CN100334826C - Method for determining different carrier gains, radio transmitter and radio transmitter module - Google Patents
Method for determining different carrier gains, radio transmitter and radio transmitter module Download PDFInfo
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- CN100334826C CN100334826C CNB2004100881566A CN200410088156A CN100334826C CN 100334826 C CN100334826 C CN 100334826C CN B2004100881566 A CNB2004100881566 A CN B2004100881566A CN 200410088156 A CN200410088156 A CN 200410088156A CN 100334826 C CN100334826 C CN 100334826C
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Abstract
The present invention relates to a method for determining single radio-frequency gain of carriers, which is used in a multi-carrier transmitter of a wireless transmitting device of a wireless communication system. In order to simply and accurately estimate gain, the gain (G1-GN) of each of different carriers is determined in an arithmetic mode at a plurality of points in each single channel carrier unit from different groups of power REF1-REFN, and the corresponding total output power of the transmitter is also determined, or power relation among the different carriers is determined just before the carriers are combined to form a single multi-carrier signal. The relation is used for determining the contribution of the different carriers to the transmission power of the multi-carrier signals and then determining the radio-frequency gain for the different carriers. The present invention also relates to a corresponding wireless transmitting device and a module of the wireless transmitting device.
Description
The application is that application number is 01811311.7, and the applying date is April 17 calendar year 2001, and " denomination of invention " is the dividing an application of application for a patent for invention of " method, wireless launcher and the wireless launcher module of determining different carrier gains ".
Technical field
The present invention relates in the multicarrier transmitter of the wireless launcher of wireless communication system, be identified for the method for the independent rf gain of different carrier, multicarrier transmitter comprises with the device of the signal summation of the device of two different carriers of modulation signal modulation, the output of calculating modulating device and the Multi-Carrier Power Amplifier of the resultant signal that amplification is used to launch at least.The invention still further relates to the module of wireless launcher, this wireless launcher and comprise the wireless communication system of this wireless launcher.
Background technology
In wireless communication system, can utilize the output of cellular basestation transmitter to have the signal of different carrier frequencies as everyone knows.In this transmitter, have a bit very important, be accurate to predetermined level thereby promptly can control rf gain with the power output of controlling each carrier wave.
Comprising the traditional base station transmitter of the independent transmitter that is used for each carrier wave, can be identified for the rf gain of each carrier wave independently from the gain of other carrier waves.
In order to illustrate, Fig. 1 shows the block diagram based on this traditional base station transmitter of RF (radio frequency) IQ (homophase and quadrature) modulator.Base station transmitter comprises N single carrier transmitter, there is shown first and last.Mark with the transmitter numerical value of index 1 or N or parts represents that they are assigned to first or N single carrier transmitter.
Each of N single carrier transmitter comprises baseband modulator 1, and its input is connected to provides the communication network of data symbol element (not shown) and its output to be connected to two digital to analog converters 3,4.Digital to analog converter 3,4 is connected to the input of radio frequency modulator 5.Another input of radio frequency modulator is connected to local oscillator (LO) 6, and the output of radio frequency modulator 5 is connected to the input of variable gain RF amplifier 7 simultaneously.The output that the output of RF amplifier 7 is connected to the SCPA8 of single carrier power amplifier (SCPA) (SCPA) 8 and each single carrier transmitter is connected to transmitting antenna 11 by public summing unit 10.The output of SCPA8 is also connected to the power detection that belongs to each single carrier transmitter and the input of control device 9.
Similarly, baseband modulator 1 is connected to the input of power detection and control device 9 by base band power checkout gear 2.The output of power detection and control device 9 has formed the gain control input of RF amplifier 7.In fact, also comprise more up-conversion level and amplifier, and also may comprise filter.
The baseband modulator 1 of N single carrier transmitter receives by the symbol of transmitting antenna 11 through air interface transmission from network.The baseband modulator 1 of each transmitter produces compound simple numerical signal trajectory (trajectory) and signal is transferred to two digital to analog converters (DAC) 3,4 with the IQ form.Each digital IQ signal converts analog signal I, Q to by one of two digital to analog converters 3,4, offers radio frequency modulator 5 then.In radio frequency modulator 5, signal I and Q are modulated on one of N carrier wave that the local oscillator relevant with each single carrier transmitter 6 determine.Then, RF amplifier 7 is according to being used for the gain control signal GC of RF amplifier 7 separately
1, GC
NThe output signal of radio frequency modulator 5 is amplified in the gain that is provided with, and offers SCPA8.The power combination that summing unit 10 is exported N single carrier transmitter at the output of SCPA8 is used for by transmitting antenna 11 emissions.
In relevant base band power detection device 2, calculate the power REF of each baseband modulator 1 output signal
1, REF
NAnd deliver to each power detection and control device 9.Similarly, the output of each SCPA8 is also offered each power detection and control device 9, the power output comparison of in power detection and control device 9, measuring outgoing carrier power and the base band power checkout gear 2 of outgoing carrier power and corresponding single carrier transmitter being provided.The merchant of these power has constituted the gain G in each RF path
1, G
NIf the measurement gain G on N single carrier transmitter RF path
1, G
NDeparted from desired value, then in order to handle gain G
1, G
NTo the direction of expectation gain, responsible power detection and control device 9 offer change the gain control signal GC of each RF amplifier 7 that is used for this paths
1, GC
N
Similarly, the individual power control of different carrier can realize in traditional base station transmitter another one embodiment shown in Figure 2.Except each baseband modulator 1 is connected to each RF amplifier 7 via digital up converter 12 and single digital to analog converter 14, base station transmitter shown in Figure 2 is all corresponding to the base station transmitter among Fig. 1.The input of digital up converter 12 is also connected to digital controlled oscillator (NCO) 13.Corresponding to the single carrier transmitter components of Fig. 1, same reference numerals is distributed to the single carrier transmitter components among Fig. 2.
The example of contrast Fig. 1, at this, carried out in numeric field by the conversion to modulated RF signal of the digital IQ signal of one of baseband modulator 1 output by respective digital upconverter 12, the frequency of modulated RF signal is definite by the NCO13 relevant with digital up converter 12.Convert the output of digital up converter 12 to analog signal by single digital to analog converter 14 then.At present, digital to analog converter 14 can not produce high-quality signal in the GHz frequency.Therefore, in practice, the structure of Fig. 2 has at least one extra simulation up-conversion level.But in order not illustrate in the reduced graph.
Because the output of the power of the power of baseband modulator 1 output and SCPA8 is corresponding to the output of the baseband modulator 1 of Fig. 1 and SCPA8 and the same with Fig. 1 embodiment it is offered power detection and control device 9, so can gain by such RF that be identified for each carrier wave independently as described in Figure 1.In addition, for predetermined value is adjusted in the gain that will be used for each carrier wave, power detection and control device 9 are according to the gain G of determining
1, G
NGain control signal GC is provided
1, GC
NAnd they are offered each RF amplifier 7.
The base station need be controlled the power output that is used for each carrier wave and be accurate to predetermined value.At the peak power output place, GSM (global system for mobile communications) and each carrier wave of WCDMA (Wideband Code Division Multiple Access (WCDMA)) standard-required surpass ± accuracy of 2dB.In fact even will surpass ± 1dB in order to realize this accuracy reliably, the power measurement accuracy.
If single carrier power amplifier is used for each carrier wave, this accuracy can for example be passed through one of described structure of Fig. 1 and 2 and realize, because the visit to each carrier wave individual output power is provided.Only carrier wave is merged and have several shortcomings in output place of single carrier power amplifier.The quantity that power output is wasted and pays many effort change carrier waves in the base station.Therefore, Wei Lai base station will just merge carrier wave or even more early before power amplification.Carrier wave thereby be the power that single Multi-Carrier Power Amplifier amplifies.Yet this will cause the problem in the power control, only will be the multi-carrier signal of single Multi-Carrier Power Amplifier output because each power of the carrier wave of power amplification can not be visited once more.Therefore, the accurate estimation of each carrier wave RF gain becomes complicated more.
In a kind of known method, suppose that simply the RF gain that is used for all carrier waves all equates.Therefore, measure gross output and with the summation of baseband modulator power output except that gross output.This merchant constitutes overall gain.If the gain of measuring departs from desired value, gain to right value in order to adjust this so, be used for each RF Amplifier Gain control signal and done same change.The shortcoming of this method is under all environmental conditions and the RF gain that can't guarantee to be used for different carrier of the whole life period of base station all equates veritably and keep whole numerical value of common gain control signal all to equate.Only between the erecting stage of base station and the base station check gain relation each other by on-site visit after coming into operation.
In a kind of alternative method, advised using channelizer with each carrier wave separated from one another at the output of single Multi-Carrier Power Amplifier.Measure the power of separated carrier wave and relatively then with it and power of baseband signal.Be divided by by each logarithm value that is used for a carrier wave, obtain being used for the gain of each carrier wave.If one of gain that this obtains has departed from the predetermined gain that is used for this carrier wave, then can adjust gain individually by corresponding gain control signal.The shortcoming of this method is to need channelizer.The selectivity of this needs makes and must could realize at intermediate frequency or base band.Therefore, need one or two down-conversion stage, this has increased complexity and the uncertainty measured.In the reality, the power measurement circuit also needs some automatic gauging loop so that keep accuracy.Therefore, power control becomes quite expensive and takes up space.And, if use the frequency hopping transmitter, among for example similar GSM, the channelizer frequency hopping of also having to adapt to, this makes structure complicated more.
Summary of the invention
An object of the present invention is to provide method, the wireless launcher that can in the multicarrier transmitter of the wireless launcher of wireless communication system, be identified for the independent rf gain of different carrier simply, be used for the module of this wireless launcher and comprise the cordless communication network of this wireless launcher.
On the one hand, this purpose can utilize the method for the independent rf gain that is identified for different carrier to realize in the multicarrier transmitter of the wireless launcher of the wireless communication system of the present invention's first alternative, multicarrier transmitter comprises: use modulation signal to modulate the device of at least two different carriers, be used to calculate the device by the MCW modulated carrier wave summation of modulating device output, with the Multi-Carrier Power Amplifier of the summation carrier wave that is used for amplifying emission, wherein
Be that on different carrier, modulate and the power packages as many unlike signal of carrier number, determine the power of the summation carrier wave of Multi-Carrier Power Amplifier output; And wherein
The power of the summation carrier wave of power packages by mathematically estimating modulation signal and corresponding Multi-Carrier Power Amplifier output is for each carrier wave is determined the signal input of modulating device and the rf gain between the Multi-Carrier Power Amplifier output.
In the distortion of this method of the present invention's first scheme, multicarrier transmitter comprises the digital to analog converter that is used for each carrier wave, this digital to analog converter be used for they are offered be used to calculate the device of MCW modulated carrier wave summation before, digital MCW modulated carrier wave is transformed into the simulation MCW modulated carrier wave.This transducer also can be included in the multicarrier that is used for existing first method.But in described distortion, the power of determining total carrier wave of Multi-Carrier Power Amplifier output make the signal that is input to digital to analog converter the different capacity group at least with carrier wave as many.The corresponding power of total carrier wave of the power packages of the signal by mathematically estimating to be input to digital to analog converter and Multi-Carrier Power Amplifier output then determines that the input of digital to analog converter and the rf gain between the Multi-Carrier Power Amplifier output are for use in each carrier wave.
On the other hand, this purpose can be used for the wireless launcher that has multicarrier transmitter of cordless communication network and realize in first scheme of the present invention, this wireless launcher comprises: the device that uses at least two different carriers of modulation signal modulation, be used to calculate device by the MCW modulated carrier wave summation of modulating device output, Multi-Carrier Power Amplifier with the summation carrier wave that is used for amplifying emission, with utilize power detection and control device that the as many power packages that is used for the signal of modulated carrier of carrier wave that provides with modulating device at least as input is provided, and the corresponding power of summation carrier wave that is used for every group Multi-Carrier Power Amplifier output, power detection and control device will be suitable for mathematically determining rf gain at the multicarrier transmitter that is used for each carrier wave from the power that receives.
In distortion corresponding to the wireless launcher of the distortion of described method, the multicarrier transmitter of wireless launcher also comprise in addition be used for each digital MCW modulated carrier wave convert to the simulation MCW modulated carrier wave digital to analog converter, be used to calculate the device of the simulation MCW modulated carrier wave summation of digital to analog converter output.In the first improvement wireless launcher, also comprise this digital to analog converter.Contrast this first improvement wireless launcher, in this distortion, power detection and control device receive as input at least with the as many power packages that is input to the signal of digital to analog converter of carrier wave, and the corresponding power of total carrier wave that is used for every group Multi-Carrier Power Amplifier output.As existing first wireless launcher, power detection and control device are adapted at being used for the multicarrier transmitter of each carrier wave from the mathematically definite rf gain of the power that receives.
Purpose of the present invention can also realize in first scheme of the module with the wireless launcher that is used for wireless communication system, comprises the power detection and the control device of the wireless launcher in one of existing distortion.
Method, wireless launcher and the module of the present invention's first scheme be from such thought, i.e. the summation power of total carrier wave of Multi-Carrier Power Amplifier output can with in the single carrier equipment as variable but mathematically describe for the power of the prearranged signals of known coefficient with as the total RF gain that is used for each carrier wave of unknown quantity.Prearranged signals can be the signal that is input to the device that is used to modulate different carrier, or is input to the signal that is included in the digital to analog converter in the single carrier equipment.The power of the signal in the single carrier equipment can easily determine and these power in each variation caused the respective change in the gross output.Many groups different capacity of signal is input to modulating device or digital to analog converter respectively and corresponding gross output is offered a plurality of equations that can mathematically find the solution, suppose the group that provides at least with existing carrier wave as many.Therefore, the improving one's methods of first aspect, wireless launcher and module can not used channelizer and determine the gain of each carrier wave according to the present invention, but still accurately.Avoid using channelizer to make and implement seldom to go wrong than simple and frequency hopping.
Purpose of the present invention equally can be in alternative plan of the present invention realizes by being used for the method that multicarrier transmitter at the wireless launcher of wireless communication system is identified for the independent rf gain of different carrier, multicarrier transmitter comprises: the device that uses at least two different carriers of modulation signal modulation, be used to calculate device by the MCW modulated carrier wave summation of modulating device output, Multi-Carrier Power Amplifier with the summation carrier wave that is used for amplifying emission, wherein be respectively each carrier wave and determine to be input to the power of the MCW modulated carrier wave of summing unit, and, estimate to be input to the power division of the MCW modulated carrier wave of summing unit wherein in order to determine the contribution of different carrier to total carrier power of the Multi-Carrier Power Amplifier output of the rf gain that is used to be identified for different carrier.
In alternative plan of the present invention, purpose of the present invention can also realize by the respective wireless emitter that has multicarrier transmitter that is used for cordless communication network, this wireless launcher comprises: the device that uses at least two different carriers of modulation signal modulation, be used to calculate device by the MCW modulated carrier wave summation of modulating device output, Multi-Carrier Power Amplifier with the summation carrier wave that is used for amplifying emission, and utilize gain calculating and control device to receive the gross power of total carrier wave of exporting as the Multi-Carrier Power Amplifier of input value, offer the power of the MCW modulated carrier wave of summing unit by modulating device, power with the signal that is used for modulated carrier, described gain calculating and control device estimation are input to the power division of the MCW modulated carrier wave of summing unit, so that determine the contribution of different carrier to the gross power of total carrier wave of Multi-Carrier Power Amplifier output, be identified for the rf gain of different carrier.
In the distortion of the wireless launcher that is used for alternative plan of the present invention, the multicarrier transmitter of wireless launcher comprise in addition be used for each digital MCW modulated carrier wave convert to the simulation MCW modulated carrier wave digital to analog converter, be used to calculate the device of the simulation MCW modulated carrier wave summation of digital to analog converter output.The wireless launcher that is used for the method for alternative plan of the present invention in existing first wireless launcher neutralization also comprises this digital to analog converter.In this distortion, gain calculating and control device receive the digital to analog converter that is used for each carrier wave as the power of total carrier wave of the Multi-Carrier Power Amplifier output of input value, respectively offer summing unit MCW modulated carrier wave power and be input to the power of the signal of digital to analog converter.Gain calculating and control device estimate to be input to the power division of the signal of summing unit then with regard to different carrier, so as to determine different carrier to the contribution of the gross power of total carrier wave of Multi-Carrier Power Amplifier output, be identified for the rf gain of different carrier.
Corresponding to these distortion of wireless launcher, can determine gain based on the power of the signal that is used for modulating each carrier wave or based on the method that illustrates at last of the signal that is input to each digital to analog converter.
At last, purpose of the present invention can realize that this module comprises this gain calculating and control device and/or is used for device each carrier wave, that be used to detect the power of the MCW modulated carrier wave that offers summing unit respectively at the alternative plan that the present invention has a corresponding module that is used for this wireless launcher.
The method of alternative plan, wireless launcher and module are based on such fact according to the present invention, and promptly the multicarrier amplifier gains in having very accurately by the deisgn approach.
The input power of Multi-Carrier Power Amplifier is quite little, typically less than 10dBm rms (root mean square).If transmitter can not be launched in maximal power level, power even can be littler, for example 0 to-10dBm.RF detector in this low incoming level operation is not especially accurately with thermally-stabilised.Therefore carry out relatively difficulty of carrier power measurement accurately at the input of Multi-Carrier Power Amplifier.In principle, can produce higher input signal for Multi-Carrier Power Amplifier, if but for example be WCDMA, this requires the maximum linear degree from exciting amplifier.This means that only using the input power of measuring is worthless to Multi-Carrier Power Amplifier, the input power of measurement multiplies each other with each gain that is used for the Multi-Carrier Power Amplifier of each carrier wave and is used to calculate the gross output of each carrier wave.
On the contrary, second improvement project according to the present invention was defined as multi-carrier signal with single-channel carrier power before the summation of MCW modulated carrier wave, but only relative to each other used.Although can not determine to be input to the power of the MCW modulated carrier wave of Multi-Carrier Power Amplifier exactly, can reciprocally accurately follow the tracks of power.The relative intensity that can compare each carrier power like this at the output of multicarrier transmitter partial low-power.Gross power or overall gain that the relative intensity of determining can be used for being identified for total carrier wave then are assigned to each carrier wave.The gain that is used for different carrier in the Multi-Carrier Power Amplifier can consider to be used for this distribution.Therefore, can obtain to be used for accurate each yield value of each carrier wave.
The present invention's second improvement project comparison first improvement project has several advantages.Do not need to solve an equation group and can directly obtain gain information in the simple back of measuring is not so need to wait for a series of measurements.Possibly, only need less accuracy even in the measurement of multi-carrier signal.At last, alternative plan of the present invention also is applicable to fixed carrier power.On the contrary, the advantage of first improvement project is only to need less RF power detector.And in alternative plan, except constant, the frequency response of MCPA reasoning reliably obtains.
Simply and accurately determine that two schemes according to the present invention have all been used the mathematical computations of definite power for what each RF that considers the different carrier in the multi-carrier-wave wireless emitter gained.
It should be noted that the definite gain of the power that is based on the signal that is input to digital to analog converter in two each modification of scheme, wording " is input to digital to analog converter " and not necessarily must represents to be directly inputted to these transducers.On the contrary, any element that is input to different single-channel carriers unit has all constituted this and has been input to digital to analog converter, though incoming carrier offers that digital to analog converter has been modulated at numeric field.
Wireless launcher of the present invention can be the base station especially, but similarly can be the emitter of any other use multi-carrier signal of being used to launch.
Purpose of the present invention can also utilize the cordless communication network that comprises the wireless launcher in any one scheme of the present invention to realize.The preferred embodiments of the present invention can become clear from following claims.
In most of wireless launcher, for can being adapted to, emitted power moves needs, can in time slot, change the power of the signal that is provided for the RF modulation.More specifically, in tdma system, in time slot, can change the power of each carrier wave.On the contrary,, in the concrete time slot of user, can change the power of personal code work at cdma system, the time slot of different user differ from one another the step and each carrier service in a plurality of users.Therefore, in the carrier power of CDMA signal, time slot can not be discerned once more.The possibility that changes transmitting power reduced network internal and with the interference of other networks.
The present invention's first scheme is used in suggestion in tdma system, the power of signal that is input to modulating device or is input to digital to analog converter is corresponding to the power, the particularly power average value of a carrier wave time slot of a carrier wave time slot.That measurement time slot that means use easily with the carrier wave slot synchronization.But at tdma system, the time slot that is used to measure not necessarily must be consistent with the time slot that is used for power control.The unique requirement that is used to measure time slot be they must long enough in case provide the signal that enough power measurements accurately and mitigation be used to be input to modulating device power the gap and be used for the influence of misalignment possible, small between the gap of power of RF output signal of Multi-Carrier Power Amplifier.
Because in cdma system, can change power with mode at random, so in this system, there are not synchronous needs, carry out although measure also to be preferably in the time slot.
In having first scheme of two kinds of systems, the performance number of several measurement time slots can be stored in the register and conduct inputs to arithmetic algorithm.
On the one hand, the distortion that utilizes during power regular traffic amount can be used and be used to form continuously power packages and be used for definite rf gain based on those continuous power groups in first improvement project.On the other hand, particularly during the low traffice hours, can change the power of signal wittingly.Under the situation of back, the RF gain should be stablized so that they do not change in the time range of several hrs significantly.During the dead time, carrier power can be operated in the mode for example: promptly can be by increase the power that pseudo-Traffic Channel increases carrier wave temporarily in cdma system.Can arrange traffic carrying capacity in such a way in tdma system, promptly all carrier wave has empty slot successively.So just produced the variation between zero (or minimum) power and the typical operation power.In gsm system, because its whole time slots must be at the power that equates, so bcch carrier has been caused problem.Yet,, bcch carrier can be changed direction and arrive other RF path if transmitter has the frequency hopping ability.In the transmitter of normally launching BCCH, also can arrange zero or minimum emissive power like this.
In principle, in order to determine the gain of N different carrier, N linear equation enough satisfied the demand in the present invention's first scheme, wherein has N gain in each equation as N unknown number.But in fact,, can not guarantee that then equation group can easily find the solution if when particularly carrier power can at random change according to the needs of wireless network.These mistakes also have the power output of measuring to comprise some mistakes, although can not cause bigger mistake in calculating the RF gain.Therefore, in the preferred embodiment of the present invention's first scheme, determined more than the power packages of N group and use maximum likelihood method to obtain the gain of suitable equation.
In alternative plan of the present invention, the measurement of the power of single-channel carrier before the summation active element of handy one or more special uses carried out.If handle each carrier wave with its oneself active element, the element that then is used for different carrier should be complementary.For this reason, in order in the power relation of determining, to guarantee good accuracy, respective element can be for example from identical attenuation (die) thus same area produce them and have identical electrical characteristics, and they have thermo-contact closely.The special-purpose active element of at least one can especially single RF integrated circuit.In addition, other active elements, for example diode also is used to realize detector.In other preferred embodiment, in the single radio frequency integrated circuit, realize being used to detecting the device of the power of whole carrier waves.
In alternative plan of the present invention, the gain that is used for different carrier can be by determining to different carrier the power division of total carrier wave of Multi-Carrier Power Amplifier output according to the power relation that is input to Multi-Carrier Power Amplifier different carrier each other.Each gain can be determined by the determining section of removing the power output of distributing to a carrier wave with the power that is input to each signal that is used to the digital to analog converter modulating the device of this carrier wave or be input to this carrier equipment respectively then.Should know that the gain in MCPA can be different because being used for different carrier.
In two schemes of the present invention, be used for determining that the algorithm of the RF gain of different carrier can further improve in several ways.For example, the output signal of RF power detector that is used to detect the power of Multi-Carrier Power Amplifier output can be the nonlinear function of the true power output of Multi-Carrier Power Amplifier, and this nonlinear function has constituted detector characteristic.In order to make equation group sublinear again, can be with this detector characteristic around the linearisation of certain operations point.Although this linearisation can take place in detector self, be preferably in the numerical algorithm and carry out.
In the preferred embodiment of two schemes of the present invention, determine the rf gain of different carrier based on being used for the signal of modulated carrier, the baseband signal that baseband modulator is provided offer be used for modulated carrier device as this signal that is used to modulate.In this case, can be in baseband modulator inner or by digital baseband output in baseband modulator on the separate processor numerical value ground calculating base band power operated.
When in any one of two schemes of the present invention, when determining the rf gain of different carrier based on the power of the signal that is input to digital to analog converter, not necessarily must be at each power of input end measuring of each digital to analog converter.In the NCO modulator structure, as shown in Figure 2, digital up converter that can be before digital to analog converter is inner or be input to the power of the signal of digital to analog converter at the measurement of output end of this digital up converter.Thereby the power that is input to the signal of digital to analog converter can also multiply by a multiplication factor as the power of multiplex modulated signal at the output of this digital up converter and calculate.
Can in two schemes of the present invention, carry out the measurement of Multi-Carrier Power Amplifier power output by the RF integrated circuit, but can not get measurement result very accurately like this.Replace, preferably the radiofrequency signal of down-conversion Multi-Carrier Power Amplifier output at first.Down signals is changed into numeric field then, has determined power therein.In order to monitor and control linearization performance, most of MCPA inside has had low-converter and ADC piece.This piece can be easily increases the basis that digital rms detects as the MCPA to the power of the signal that is used for detecting Multi-Carrier Power Amplifier output.
In the other preferred embodiment of two schemes of the present invention, in software, realize RF gain estimation.In addition, in first scheme, the storage of gain controlling and measured value can realize in software.
In two schemes of the present invention, preferably relatively with RF gain of determining and the predetermined gain value that is used for each carrier wave, so that can correspondingly regulate the gain that is used for each carrier wave.
The wireless launcher of two schemes can use in the mode of various architecture of base station.For example, modulating device can be used for the independent RF IQ modulation of each carrier wave or the mode of NCO modulation path realizes so that Fig. 1 and 2 is described, respectively the output from the output of baseband modulator to the RF amplifier, be used to modulate the signal of the carrier wave that provides as baseband modulator as described in Fig. 1 and 2.In two schemes, additional element can be arranged between modulating device, summing unit and power detection and control device or gain calculating and the control device.
Can combine with the method mentioned in the background of the present invention one of improving one's methods, wherein always equally regulate gain to be used for whole carrier waves.During normal running, power is controlled with above-mentioned described conventional method work.As already mentioned, this power control has such shortcoming, and promptly it relies on equating of unwarrantable each RF gain.Therefore,, be preferably in during the low traffice hours, use one of method of the present invention not determine carrier gains with makeing mistakes in certain time.Equate that still then these gains are used for checking if be used for the RF gain of each carrier wave.If not this situation, then the gain of carrier wave is done some and regulate automatically and individually.
The method according to this invention, wireless launcher and module especially can be used for GSM and WCDMA, although be not special-purpose.
In another aspect of this invention, provide a kind of cordless communication network, it comprises according to wireless launcher of the present invention.
Description of drawings
The present invention is described below with reference to accompanying drawings in further detail, wherein:
Fig. 1 shows the block diagram based on the traditional base station transmitter of RF IQ modulation;
Fig. 2 shows the block diagram based on the traditional base station transmitter of NCO modulation;
Fig. 3 shows the block diagram of the multi-carrier base station transmitter of the RF IQ modulation of using based on the present invention's first scheme;
Fig. 4 shows the block diagram of the multi-carrier base station transmitter of the NCO modulation of using based on the present invention's first scheme;
Fig. 5 illustrated in the base station transmitter of Fig. 4 or 5, use according to first method of the present invention;
Fig. 6 shows the block diagram based on the part of the alternative multi-carrier base station transmitter of the NCO modulation of the present invention's first scheme use;
Fig. 7 shows the block diagram based on the multi-carrier base station transmitter of the NCO modulation of the alternative plan according to the present invention; With
Fig. 8 schematically shows the detection of base station transmitter of Fig. 7 and the details of summing unit.
Embodiment
Fig. 1 and 2 has been described at background of the present invention.
Fig. 3 and 4 shows the block diagram of the different embodiment of the multi-carrier base station transmitter that can implement the present invention's first scheme easily respectively.
Fig. 3 is based on the multi-carrier base station transmitter of the RF IQ modulation of the traditional base station transmitter that is similar to shown in Fig. 1.It equally also comprise be used for N carrier wave each pass through the baseband modulator 1 that two digital to analog converters 3,4 and radio frequency modulator 5 are connected to variable gain radio frequency amplifier 7.Each baseband modulator 1 is also connected to base band power checkout gear 2 and each radio frequency modulator 5 is connected to local oscillator (LO) 6.Yet contrast Fig. 1, the output of each RF amplifier 7 are not connected to special-purpose SCPA but are connected to unique Multi-Carrier Power Amplifier (MCPA) 15 by summing unit 10.The output of MCPA15 is connected to transmitting antenna 11 and public power detection and control device 16.Power detection and control device 16 are connected to the output of base band power checkout gear 2 and the gain control input that its output is connected to RF amplifier 7 at its other input.
Fig. 4 is based on the multi-carrier base station transmitter of the NCO modulation of the traditional base station transmitter that is similar to shown in Fig. 2.It comprises equally be used for N carrier wave each pass through the baseband modulator 1 that digital up converter 12 and digital to analog converter 14 are connected to RF amplifier 7.Each baseband modulator 1 is also connected to base band power checkout gear 2 and each digital up converter 12 is connected to NCO13.Contrast Fig. 2 and the same with Fig. 3, the output of each RF amplifier 7 is connected to public MCPA15 by summing unit 10.The output of MCPA15 is connected to transmitting antenna 11 and public power detection and control device 16.Power detection is connected to base band power checkout gear 2 and RF amplifier 7 with control device 16 other inputs respectively with output as the base station transmitter of Fig. 3.
In the multi-carrier base station transmitter of Fig. 3 and 4, the symbol that offers baseband modulator 1 is handled as Fig. 1 and 2 is described respectively, leaves RF amplifier 7 up to them.In two embodiment, in summing unit 10, offer MCPA15 as multi-carrier signal then with the output signal summation of RF amplifier 7 and with it, MCPA15 amplifies the signal that receives.
Be arranged on the power detection of MCPA15 output and control device 16 and receive the power output of the gross power of MCPA15 output and the digital baseband modulator 1 by base band power checkout gear 2 as input.For this reason, for the digital rms that can realize power output detects, power amplification after, total RF signal is transferred to the transmitting antenna 11 that is used to launch on the one hand and on the other hand with total RF signal down-conversion be transformed into the numeric field inside of MCPA15.Alternately, in the MCPA15 outside RF detector or down-conversion path and digitlization can be arranged.For the performance number of each baseband modulator 1 output being provided can for power detection and control device 16, each base band power checkout gear 2 has formed the processor of operating and has numerically calculated base band power on the digital baseband output of the baseband modulator 1 of its connection.According to first method of the present invention, power detection and control device 16 can be provided for the gain control signal GC of each carrier wave respectively according to this power information
1To GC
N, this point will describe in detail with reference to Fig. 5 below.
Fig. 5 has illustrated the basic principle in power detection and control device 16 processing according to the present invention's first method that is used for multi-carrier base station transmitter as described in Fig. 3 or 4.
Base station transmitter is offered baseband modulator 1 through the symbol of air interface transmission.Each rms performance number REF of each sampler 23 of power detection and control device 16 is promptly determined and be transferred to the power output of baseband modulator 1 in base band power checkout gear 2
1And REF
N, in several measurement time slots, be changed.Each sampler 23 by one measure time slot ask reception base band power mean value and the average power content that each measures time slot is transferred to the base band register 24 of connection, all store up to the numerical value that is used for N measurement time slot and be used for each carrier wave.Therefore, be used for one group of base band power value REF that each measures time slot
1And REF
NBe respectively stored on N the base band register 24.
In addition, as mentioned above, under two kinds of situations, the base station transmitter that relies on RF amplifier 7, summing unit 10 and MCPA15 to use, the signal of baseband modulator 1 output are further handled by digital to analog converter 3,4 and radio frequency modulator 5 or by digital up converter 12 and digital to analog converter 14.
Detect by power detector 20 MCPA15 output signal power the rms value and the rms value is transferred to relevant sampler 21.Sampler 21 by one measure time slot find the solution reception power mean value and will be used for each average MCPA15 output power value of measuring time slot and be stored in the register 22, wherein one group of average base band power value is stored in the base band power register 24.When N group base band power value and corresponding M CPA15 output power value are stored in the register 24,22 at least, the content of register 22,24 is offered the device 25 of the equation group that can handle N the equation composition that has N unknown number.If use base station transmitter in tdma system, measuring time slot can be easily and the carrier wave slot synchronization.
During given measurement time slot m, each power P of the RF signal of MCPA15 output
0 ＜m 〉Be the amplification during that time slot the base band reference power and, shown in following equation:
REF
i ＜m 〉Be according to measuring i (i=1 in N the average carrier wave of time slot m at the baseband modulator output ... N) individual power, and G
i(i=1 ... N) be the RF power gain that will estimate that is used for i carrier wave.Suppose that N group base band power and N corresponding M CPA power output are stored in the register, then obtain having the equation group of N equation composition of N unknown number, therefrom can calculate the unknown RF gain G that is used for each carrier wave
iUtilization can the dematrix equation device 25 separate this equation group, the gain of estimation that the radio-frequency path that is used for each carrier wave is provided is as solution of equations.
Special-purpose summator 26 is with the gain G of estimating
iCompare with the predetermined gain that is used for each carrier wave, in the summator 26 of special use, deduct the gain G of estimation from predetermined gain
iTherefore the controller 27 that is connected to each summator 26 offers the gain control signal GC of the gain control input of each RF amplifier 7 by adjusting
i(i=1-N), utilize this difference control as a result to be used for the gain of each carrier wave.
In a preferred embodiment, in order to be provided for the gain of each carrier wave exactly, above-mentioned program is also used regularly.In the centre, determine overall gain divided by total power output by summation only with input power.With the overall gain comparison of this overall gain and expectation and utilize their difference equally to change the gain of whole RF amplifiers 7, as a kind of possibility of description of the Prior Art.During low traffic constantly, systematically carry out the setting of the gain of first method according to the present invention by changing carrier power.If during increasing the false code channel, change carrier power in one way so that matrix equation is found the solution easily, then can under the situation of seldom makeing mistakes, solve each RF gain, data transmission is unaffected simultaneously.
In the distortion of the embodiment of Fig. 4, what offer power detection and control device 16 is not power of baseband signal, but is provided to the power of signal of the input of digital to analog converter 14.Frequency converter 12 outputs interior or frequency converter 12 in number are definite in number for the power of these signals.Determining corresponding to Figure 4 and 5 of the RF gain of different carrier is described definite.Yet in this case, the gain of determining does not comprise the gain in the digital up converter 12.
Fig. 6 shows another distortion of this multi-carrier base station transmitter that can use as the GSM multi-carrier base station transmitter, and previous embodiment can be used for WCDMA especially simultaneously.Except the change of base band power checkout gear 2 in each single carrier equipment and the various piece between the digital to analog converter 14, multi-carrier base station transmitter is corresponding to the transmitter of Fig. 4.Therefore, only show this part, and only be first carrier this part.
In the single carrier equipment of describing, be provided with two multipliers 40,41 in number between frequency converter 12 and the digital to analog converter 14, wherein digital up converter 12 and digital to analog converter 14 also exist in Fig. 4.The output of base band power checkout gear 2 is also connected to the input of the 3rd multiplier 42.In addition, the common source of power control level signal is connected to the input of second multiplier 41 and the input of the 3rd multiplier 42, represents with the double-head arrow between the second and the 3rd multiplier 41,42 in Fig. 6.
In operation, first multiplier 40 multiplies each other the output and ramp profile (ramping profile) signal 43 of digital up converter 12.This ramp profile signal is used for the time slot of separate modulated carrier signal.Then consequential signal is offered the input of second multiplier 41.The power control level signal in time slot be constant and in each each time slot corresponding to the output power of transmitter of needs, this power control level signal offers second multiplier 41 as second input signal.Therefore, second multiplier 41 will multiply each other from the power control level of slope (tamped) that first multiplier 41 receives and modulated carrier signal and reception and the result will be transferred to digital to analog converter 14.On the other hand, the 3rd multiplier 42 receives as the power output of the digital baseband modulator 1 of first input signal with as the power control level signal of second input signal by base band power checkout gear 2.The 3rd multiplier 42 is also as a result of exported reference power REF with the signal multiplication of two receptions
1
If the product of the gain of digital up converter and the peak value of ramp profile is whole, just by the gain of peak value compensating digits upconverter during multiplying each other of ramp profile, the power REF that exports of the 3rd multiplier 42 then
1Equate with the power that is input to digital to analog converter 14.Then with power REF
1Offer power detection and control device 16 with the corresponding power that is used for other carrier waves, thereby as Fig. 3-5 is described, utilize them to be identified for the RF gain of different carrier in power detection and control device 16.
Fig. 7 shows the block diagram based on the multi-carrier base station transmitter embodiment of the operable NCO modulation of alternative plan according to the present invention.Base station transmitter comprise with Fig. 4 in the same each the independent transmitter section of N carrier wave that is used for.Each of these independent transmitter sections comprises baseband modulator 1, digital up converter 12, digital to analog converter 14 and RF amplifier 7.In fact, structure also will comprise more up-conversion level, amplifier, filter etc.The output of RF amplifier 7 is by detecting and summing unit 17 and MCPA15 are connected to transmitting antenna 11.Detection and summing unit 17 other outputs are connected to the input of gain calculating and control device 18.In addition, the output of MCPA15 is connected to the input of gain calculating and control device 18 by rms power detector 19.At last, the digital output end of each baseband modulator 1 is connected to the input of gain calculating and control device 18 by base band power checkout gear 2.Each of the N of gain calculating and control device 18 output is connected to the gain control input of one of RF amplifier 7 of N independent transmitter section.
Fig. 8 illustrates in greater detail detection and the summing unit 17 of Fig. 7.Detection and summing unit 17 comprise one group of detector 30 in the single integrated circuit.Yet the use that is used for the single integrated circuit of detector 30 only is preferred enforcement.As an alternative, also may use the independent circuit that is used for each detector.The input of each detector 30 is connected to the output of one of RF amplifier 7.The output of detector 30 is connected to the input of gain calculating and control device 18.In addition, detection and summing unit 17 comprise the summator 31 that is connected to the input of MCPA15 by the output of its each RF amplifier 7.The detector of detection and summing unit 17 can be positioned at Anywhere for 30 groups, but for the cable in the transmitter is reduced to minimum, in any case detector is positioned at the place that the single-channel carrier signal can be gathered, just near the summator 31 of the input of MCPA15.
The processing of the signal that base station transmitter will be launched in baseband modulator 1, digital up converter 12, digital to analog converter 14 and RF amplifier 7 is corresponding to the processing described in Fig. 4.
Yet the structure of contrast Fig. 4 before the carrier wave summation of summator 31 with modulation, detects each carrier power respectively in detection and summing unit 17.In order to follow the tracks of the power of each carrier wave exactly, be used to detect the power P of one of N carrier wave according to the power of other carrier wave
1-P
NN detector 30 preferably be complementary each other.With the power P that detects
1-P
NOffer gain calculating and control device 18 and total multi-carrier signal is transferred to the MCPA15 that is used for power amplification.
On the one hand, the multi-carrier signal with MCPA15 output is transferred to the transmitting antenna 11 that is used to launch.On the other hand, determine the power P of multi-carrier signal by rms power detector 19
0The power P that detects
0Be input to gain calculating and control device 18.
And, in base band power checkout gear 2, determine the power of baseband signal REF that N baseband modulator 1 exported
1-REF
NAnd it is input to gain calculating and control device 18.
Gain calculating and control device 18 comprise the different capacity value P that is used for from receiving
0, P
1-P
N, REF
1-REF
NEstimate the arithmetic algorithm of each RF gain of different carrier.All power all is the average of obtaining according to same measurement time slot before being used by algorithm.
Because the measurement power P that detector 30 is determined
1-P
NHas only the total multiplication error of each carrier wave, so their ratio does not have error.At random with the detection power of single-carrier signal and the power P of first carrier
1Relatively, the standard output power of carrier wave obtains by following formula:
P wherein
i(i=1 ... N) be the power of i carrier wave determining of each detector 30, REF
i(i=1 ... N) be the power of signal that is used for i baseband modulator 1 output of i carrier modulation, and G
i(i=1 ... N) be the RF gain of i carrier wave before summation.Draw the RF gain G of first carrier before summation from above-mentioned equation
1Normalized gain is:
And the multicarrier power output in given measurement time slot is the summation of the base band power that amplifies and obtains from following equation:
P
0＝REF
1·G
1·G
01+REF
2·G
2·G
02+…+REF
N·G
N·G
0N
The total amplification G that in this equation, is used for i carrier wave
i* G
0i(i=1 ... N) provide, wherein G
0iIt is the RF power gain that is used for detecting with the summator 31 and i the carrier wave among the MCPA15 of summing unit 17.Except the common factor of the unknown, suppose G
0iBut the value reasoning obtain.The equation of back can be rewritten as:
As mentioned above, ratio G
i/ G
1Can be easily single carrier RF power P from measuring
iWith base band power REF
iObtain.Suppose ratio G
0i/ G
01Can learn from the frequency response reasoning of MCPA15.Therefore, can easily must constitute the gain G in a RF path of first carrier use from above-mentioned solution of equation
1* G
01Because the gain ratio is known, so can go out the gain G in i RF path from the gain calculating in first path
i* G
0iIf obtain the RF gain from predetermined gain value, then gain calculating and control device 18 are regulated the gain control signal GC that is input to RF amplifier 7
i(i=1 ... N) so as the gain that makes estimation near expected gain.
The base station transmitter of Fig. 7 is based on the NCO modulation, thereby can also its change be used for this embodiment of alternative plan of the present invention according to Fig. 6.Second method according to the present invention similarly can be used for the base station transmitter based on the IQ of RF described in Fig. 3 modulation.
Although the above embodiment of the present invention is all from based on RF IQ modulation or based on the traditional base station transmitter of NCO modulation, feature of the present invention can combine with any scrutable architecture of base station.Also have when being during, can carry out various modifications within the scope of the invention from the base station transmitter modulated based on RF IQ modulation or based on NCO.
Claims (20)
1, a kind of method of the independent rf gain that is used for different carrier of multicarrier transmitter of the wireless launcher that is used for determining wireless communication system, described method comprises:
-use modulation signal to modulate at least two different carriers,
-calculating MCW modulated carrier wave summation,
-be used to launch by Multi-Carrier Power Amplifier amplification summation carrier wave,
-be respectively the power that each carrier wave is determined the MCW modulated carrier wave before calculating summation, and
-in order to determine the contribution of different carrier to the gross power of the summation carrier wave of Multi-Carrier Power Amplifier output, the branch of estimating the power of determining of MCW modulated carrier wave is equipped with the rf gain of determining different carrier, wherein, remove of the contribution of each carrier wave by the signal power that will be used for modulating each carrier wave, be identified for the rf gain of different carrier gross power.
2, method according to claim 1, wherein, multicarrier transmitter comprises the digital to analog converter that is used for before MCW modulated carrier wave is summed they being converted to analog domain, and wherein remove of the contribution of each carrier wave, thereby be identified for the rf gain of different carrier gross power by power with the signal that is input to the digital to analog converter that is used for each carrier wave.
3, according to the described method of one of claim 1-2, wherein, the characteristic of detector of gross power of summation carrier wave that is used for determining Multi-Carrier Power Amplifier output is around the linearisation of a certain working point.
4, method according to claim 1, wherein, the radiofrequency signal by down-conversion Multi-Carrier Power Amplifier output and by it is transformed into numeric field, thus in numeric field, determine the gross power of the summation carrier wave of Multi-Carrier Power Amplifier output.
5, method according to claim 1 wherein, is integrated in being used in the Multi-Carrier Power Amplifier to monitor and control the gross power that the down-conversion device of linearization performance and analog-to-digital conversion piece are used to detect the summation carrier wave of Multi-Carrier Power Amplifier output.
6, method according to claim 1 also comprises: by the rf gain of determining is compared with the predetermined gain value that is used for each carrier wave, and by correspondingly regulating the rf gain that is used for each carrier wave, thereby control the rf gain of different carrier.
7, method according to claim 1, also comprise: the rf gain of control different carrier, wherein determine the gain of different carrier and it is used for each adjusting that difference is worn the ripple gain according to claim 1, in simultaneously during remaining time, determine overall gain by the power that removes the summation carrier wave of Multi-Carrier Power Amplifier output with the power summation of single power packages, wherein equally regulate the gain of carrier wave according to the overall gain of determining for whole carrier waves.
8, a kind of wireless launcher that is used for cordless communication network has
-multicarrier transmitter, it comprises the device that is used to use at least two different carriers of modulation signal modulation, be used to calculate modulating device output the MCW modulated carrier wave summation device and be used to amplify the Multi-Carrier Power Amplifier of summation carrier wave to launch, and
-gain calculating and control device, its receive as input value Multi-Carrier Power Amplifier output the summation carrier wave gross power and be respectively applied for each carrier wave offer the power of the MCW modulated carrier wave of summing unit by modulating device, described gain calculating and control device are configured to estimate to be input to the power division of signal on different carrier of summing unit, so that determine the contribution of different carrier to the gross power of the summation carrier wave of Multi-Carrier Power Amplifier output, thereby be identified for the rf gain of different carrier, wherein, remove of the contribution of each carrier wave by the signal power that will be used for modulating each carrier wave, be identified for the rf gain of different carrier gross power.
9, wireless launcher according to claim 8, wherein, described gain calculating and control device receive the power of the signal that is used for modulated carrier as extra input value.
10, wireless launcher according to claim 9, wherein, the signal that is input to modulating device is provided by independent baseband modulator, described baseband modulator is digital homophase and the digital quadrature component of each carrier wave output corresponding to the data symbol that receives, and be connected to the base band power checkout gear, this base band power checkout gear provides the power of output signal to gain calculating and control device, wherein, modulating device comprises: be used for two digital to analog converters of each carrier wave, digital homophase and quadrature component that described digital to analog converter is used for receiving from the baseband modulator that is used for each carrier wave convert analog in-phase and quadrature component to; Be used to use the radio-frequency modulator of the component modulation of digital to analog converter output from the carrier wave of local oscillator reception; With the radio frequency amplifier that is used to amplify MCW modulated carrier wave, its gain is controlled for use at least one carrier wave by gain calculating and control device.
11, wireless launcher according to claim 9, wherein, the signal that is input to modulating device is provided by independent baseband modulator, described baseband modulator is digital homophase and the digital quadrature component of each carrier wave output corresponding to the data symbol that receives, and be connected to the base band power checkout gear, this base band power checkout gear provides the power of output signal to gain calculating and control device, wherein, the device that is used for modulated carrier comprises: be connected at least one digital up converter that is used for each carrier wave of digital oscillator, be used for will be used for the component of baseband modulator output of each carrier wave upconvert to the frequency of each carrier wave that digital oscillator provides; Be used for the output of upconverter is converted to the digital to analog converter of analog signal; With the radio frequency amplifier of the signal that is used to amplify digital to analog converter output, its gain by gain calculating and control device control for use at least one carrier wave.
12, wireless launcher according to claim 8, wherein, modulating device is arranged to use at least two different carriers of modulation signal modulation in numeric field, wherein, multicarrier transmitter also comprises the digital to analog converter that is used for each digital MCW modulated carrier wave is converted to the simulation MCW modulated carrier wave, and wherein, summing unit is arranged to calculate the simulation MCW modulated carrier wave summation of digital to analog converter output.
13, wireless launcher according to claim 12, wherein, described gain calculating and control device receive the power of the signal that is input to digital to analog converter as extra input value.
14, wireless launcher according to claim 8, the device that comprises the power that is used to detect the MCW modulated carrier wave that offers summing unit, the described device that is used to detect the power of the MCW modulated carrier wave that offers summing unit is realized as the single radio frequency integrated circuit.
15, wireless launcher according to claim 8, the device that comprises the power that is used to detect the MCW modulated carrier wave that offers summing unit, the described device that is used to detect the power of the MCW modulated carrier wave that offers summing unit comprises that at least one is used for the special-purpose radio-frequency active element of each carrier wave, and the corresponding special-purpose active element that is used for different carrier is the element of coupling.
16, wireless launcher according to claim 8, wherein, the Multi-Carrier Power Amplifier that is used for monitoring and control linearization performance integrated be used for the device and the analog-to-digital conversion piece of down-conversion, and the wherein said device that is used for down-conversion and described analog-to-digital conversion piece are used to detect the gross power of the summation carrier wave of Multi-Carrier Power Amplifier output.
17, wireless launcher according to claim 8 wherein, realizes that in software rf gain calculates.
18, a kind of module that is used for the wireless launcher of wireless communication system, wherein, described wireless launcher comprises multicarrier transmitter, this multicarrier transmitter comprises the device that is used to use at least two different carriers of modulation signal modulation, be used to calculate modulating device output the MCW modulated carrier wave summation device and be used to amplify the Multi-Carrier Power Amplifier of summation carrier wave to launch, described module comprises gain calculating and control device, this gain calculating and control device receive as input value Multi-Carrier Power Amplifier output the summation carrier wave gross power and be respectively applied for each carrier wave offer the power of the MCW modulated carrier wave of summing unit by modulating device, described gain calculating and control device are configured to estimate to be input to the power division of signal on different carrier of summing unit, so that determine the contribution of different carrier to the gross power of the summation carrier wave of Multi-Carrier Power Amplifier output, thereby be identified for the rf gain of different carrier, wherein, remove of the contribution of each carrier wave by the signal power that will be used for modulating each carrier wave, be identified for the rf gain of different carrier gross power.
19, a kind of module that is used for the wireless launcher of wireless communication system, wherein, described wireless launcher comprises multicarrier transmitter, this multicarrier transmitter comprises the device that is used to use at least two different carriers of modulation signal modulation, be used to calculate the device of the MCW modulated carrier wave summation of modulating device output, be used to amplify Multi-Carrier Power Amplifier and gain calculating and the control device of summation carrier wave to launch, this gain calculating and control device receive as input value Multi-Carrier Power Amplifier output the summation carrier wave gross power and be respectively applied for each carrier wave offer the power of the MCW modulated carrier wave of summing unit by modulating device, described gain calculating and control device are configured to estimate to be input to the power division of signal on different carrier of summing unit, so that determine the contribution of different carrier to the gross power of the summation carrier wave of Multi-Carrier Power Amplifier output, thereby be identified for the rf gain of different carrier, wherein, remove of the contribution of each carrier wave by the signal power that will be used for modulating each carrier wave to gross power, be identified for the rf gain of different carrier, described module comprises described summing unit and is used for detecting for each carrier wave respectively the device of the power of the MCW modulated carrier wave that offers described summing unit.
20, a kind of cordless communication network comprises wireless launcher according to Claim 8.
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| CN107276701B (en) * | 2016-04-06 | 2020-11-03 | 中兴通讯股份有限公司 | Method and device for detecting sub-carrier power and radio remote unit |
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| US5119042A (en) * | 1990-08-30 | 1992-06-02 | Hughes Aircraft Company | Solid state power amplifier with dynamically adjusted operating point |
| US5710990A (en) * | 1996-03-21 | 1998-01-20 | Motorola, Inc. | Transmitter which adjusts peak-to-average power of a multicarrier signal by switching between a group of channels and a phase-adjusted group of channels |
| CN1256813A (en) * | 1997-05-14 | 2000-06-14 | 夸尔柯姆股份有限公司 | Subscriber unit with plural control and data sources for CDMA wireless communication system |
| WO2000001084A1 (en) * | 1998-06-29 | 2000-01-06 | Nokia Networks Oy | Power control in a multi-carrier radio transmitter |
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