CA2208081A1 - Dual-mode fm/cdma communication system - Google Patents

Dual-mode fm/cdma communication system

Info

Publication number
CA2208081A1
CA2208081A1 CA002208081A CA2208081A CA2208081A1 CA 2208081 A1 CA2208081 A1 CA 2208081A1 CA 002208081 A CA002208081 A CA 002208081A CA 2208081 A CA2208081 A CA 2208081A CA 2208081 A1 CA2208081 A1 CA 2208081A1
Authority
CA
Canada
Prior art keywords
mode
dual
access
signal during
communication system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002208081A
Other languages
French (fr)
Other versions
CA2208081C (en
Inventor
Peter J. Black
Nathaniel B. Wilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2208081A1 publication Critical patent/CA2208081A1/en
Application granted granted Critical
Publication of CA2208081C publication Critical patent/CA2208081C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/142—Compensating direct current components occurring during the demodulation and which are caused by mistuning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2335—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal
    • H04L27/2337—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal using digital techniques to measure the time between zero-crossings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70707—Efficiency-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A dual-mode digital communication system for communicating an information signal during operation in frequency-modulated (FM) and multiple-access modes is disclosed herein. The digital communication system includes a dual-mode transmitter (14) for transmitting the information signal using an FM communication signal during FM mode operation, and for transmitting the information signal using a multiple-access communication signal during multiple-access mode operation.
The communication system further includes a dual-mode receiver (16) for receiving the FM communication signal during FM mode operation, and for receiving the multiple-access communication signal during multiple-access mode operation. Incorporated within the dual-mode receiver (16) is a digital demodulator (96) for recovering the information signal from the received FM signal during operation in the FM
mode, and for recovering the information signal from the received multiple-access signal during multiple-access mode operation.
CA002208081A 1994-12-23 1995-12-19 Dual-mode fm/cdma communication system Expired - Fee Related CA2208081C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37312294A 1994-12-23 1994-12-23
US373,122 1994-12-23
PCT/US1995/016363 WO1996020540A2 (en) 1994-12-23 1995-12-19 Dual-mode fm/cdma communication system

Publications (2)

Publication Number Publication Date
CA2208081A1 true CA2208081A1 (en) 1996-07-04
CA2208081C CA2208081C (en) 2004-05-25

Family

ID=23471060

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002208081A Expired - Fee Related CA2208081C (en) 1994-12-23 1995-12-19 Dual-mode fm/cdma communication system

Country Status (21)

Country Link
US (1) US5757858A (en)
EP (1) EP0799530B1 (en)
JP (1) JP3436372B2 (en)
KR (1) KR100427836B1 (en)
CN (1) CN1098569C (en)
AR (1) AR000415A1 (en)
AT (1) ATE264025T1 (en)
AU (1) AU700691B2 (en)
BR (1) BR9510534A (en)
CA (1) CA2208081C (en)
DE (1) DE69532863T2 (en)
ES (1) ES2222469T3 (en)
FI (1) FI972590A (en)
HK (1) HK1003689A1 (en)
IL (1) IL116475A (en)
MX (1) MX9704695A (en)
MY (1) MY114286A (en)
RU (1) RU2142205C1 (en)
TW (1) TW294867B (en)
WO (1) WO1996020540A2 (en)
ZA (1) ZA9510509B (en)

Families Citing this family (109)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2705538B2 (en) * 1993-09-22 1998-01-28 日本電気株式会社 Shared receiver for CDMA mode and FM mode
JP2822975B2 (en) * 1996-04-09 1998-11-11 日本電気株式会社 Receiving machine
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
US6055231A (en) * 1997-03-12 2000-04-25 Interdigital Technology Corporation Continuously adjusted-bandwidth discrete-time phase-locked loop
EP1538799A3 (en) * 1997-03-12 2007-12-26 Interdigital Technology Corporation Phase-locked loop with continuously adjustable bandwidth
BR9814200A (en) * 1997-11-17 2000-09-26 Ericson Inc Dual mode radio phone, dual mode modulation process for a first digital input signal and a second digital input signal, and, modulation system for a digital input signal
KR100626960B1 (en) * 1997-11-17 2006-09-26 에릭슨 인크. Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation
US6100827A (en) * 1998-09-11 2000-08-08 Ericsson Inc. Modulation systems and methods that compensate for DC offset introduced by the digital-to-analog converter and/or the low pass filter thereof
US6137826A (en) 1997-11-17 2000-10-24 Ericsson Inc. Dual-mode modulation systems and methods including oversampling of narrow bandwidth signals
US6002726A (en) * 1997-11-21 1999-12-14 Lucent Technologies Inc. FM discriminator with automatic gain control for digital signal processors
US7548787B2 (en) * 2005-08-03 2009-06-16 Kamilo Feher Medical diagnostic and communication system
US8050345B1 (en) 1999-08-09 2011-11-01 Kamilo Feher QAM and GMSK systems
US6470055B1 (en) * 1998-08-10 2002-10-22 Kamilo Feher Spectrally efficient FQPSK, FGMSK, and FQAM for enhanced performance CDMA, TDMA, GSM, OFDN, and other systems
US7415066B2 (en) * 1998-08-10 2008-08-19 Kamilo Feher Mis-matched modulation-demodulation format selectable filters
US7079584B2 (en) 1998-08-10 2006-07-18 Kamilo Feher OFDM, CDMA, spread spectrum, TDMA, cross-correlated and filtered modulation
US7593481B2 (en) * 1998-08-31 2009-09-22 Kamilo Feher CDMA, W-CDMA, 3rd generation interoperable modem format selectable (MFS) systems with GMSK modulated systems
US7515896B1 (en) 1998-10-21 2009-04-07 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6317765B1 (en) * 1998-09-16 2001-11-13 Cirrus Logic, Inc. Sinc filter with selective decimation ratios
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
FI112741B (en) 1998-11-26 2003-12-31 Nokia Corp Method and arrangement for transmitting and receiving RF signals at various radio interfaces of communication systems
US7209725B1 (en) 1999-01-22 2007-04-24 Parkervision, Inc Analog zero if FM decoder and embodiments thereof, such as the family radio service
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6853690B1 (en) 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US6141389A (en) * 1999-07-09 2000-10-31 Sicom, Inc. Digital tuner
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US7260369B2 (en) 2005-08-03 2007-08-21 Kamilo Feher Location finder, tracker, communication and remote control system
US9307407B1 (en) 1999-08-09 2016-04-05 Kamilo Feher DNA and fingerprint authentication of mobile devices
US9813270B2 (en) 1999-08-09 2017-11-07 Kamilo Feher Heart rate sensor and medical diagnostics wireless devices
US9373251B2 (en) 1999-08-09 2016-06-21 Kamilo Feher Base station devices and automobile wireless communication systems
US6963734B2 (en) * 1999-12-22 2005-11-08 Parkervision, Inc. Differential frequency down-conversion using techniques of universal frequency translation technology
US6721548B1 (en) * 1999-12-22 2004-04-13 Koninklijke Philips Electronics N.V. High dynamic range low ripple RSSI for zero-IF or low-IF receivers
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US6993105B1 (en) * 2000-05-09 2006-01-31 Cypress Semiconductor Corp. Linearized digital phase-locked loop
KR100403724B1 (en) * 2000-06-28 2003-10-30 삼성전자주식회사 Digital fm receiver for recovering fm digital data frame in mobile communication system
FI114261B (en) * 2000-09-12 2004-09-15 Nokia Corp Transmitter and wireless communication device
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US7003024B2 (en) * 2000-12-01 2006-02-21 Hitachi, Ltd. Semiconductor device
JP3703083B2 (en) * 2001-01-10 2005-10-05 松下電器産業株式会社 Waveform generator
US7076225B2 (en) * 2001-02-16 2006-07-11 Qualcomm Incorporated Variable gain selection in direct conversion receiver
CN1909366B (en) * 2001-02-16 2012-08-15 高通股份有限公司 Direct conversion receiver architecture
US20020126770A1 (en) * 2001-03-09 2002-09-12 Behrouz Pourseyed Method and system for acquiring narrowband channel information over a wideband channel receiver
US6674999B2 (en) * 2001-03-16 2004-01-06 Skyworks Solutions, Inc Dynamically varying linearity system for an RF front-end of a communication device
GB2374219B (en) * 2001-04-06 2004-10-13 Nokia Corp A receiver
US6724247B2 (en) 2001-09-13 2004-04-20 Telefonaktiebolaget Lm Ericsson (Publ) FM demodulator having DC offset compensation
US7085335B2 (en) * 2001-11-09 2006-08-01 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7024169B2 (en) * 2002-01-25 2006-04-04 Qualcomm Incorporated AMPS receiver using a zero-IF architecture
GB0204108D0 (en) * 2002-02-21 2002-04-10 Analog Devices Inc 3G radio
CN1640085A (en) * 2002-02-21 2005-07-13 模拟设备公司 3G radio device
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7151913B2 (en) * 2003-06-30 2006-12-19 M/A-Com, Inc. Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
US7221915B2 (en) * 2003-06-25 2007-05-22 M/A-Com, Inc. Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
US7751496B2 (en) * 2003-06-25 2010-07-06 Pine Valley Investments, Inc. Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
TW200409454A (en) * 2002-11-18 2004-06-01 Winbond Electronics Corp Automatic gain controller and its controlling method
US7394870B2 (en) * 2003-04-04 2008-07-01 Silicon Storage Technology, Inc. Low complexity synchronization for wireless transmission
US7221918B1 (en) * 2003-08-11 2007-05-22 National Semiconductor Corporation Digital DC-offset correction circuit for an RF receiver
US8050640B2 (en) * 2003-10-20 2011-11-01 Avaak, Inc. Diverse antenna system
US7356091B2 (en) * 2003-12-09 2008-04-08 M/A-Com, Inc. Apparatus, methods and articles of manufacture for signal propagation using unwrapped phase
US7057543B2 (en) * 2004-04-29 2006-06-06 Invensys Systems, Inc. Low power method and interface for generating analog waveforms
US7643249B2 (en) * 2004-10-04 2010-01-05 Tdk Corporation Supporting mechanism for magnetic head slider and testing method for the magnetic head slider
US7359449B2 (en) * 2004-10-05 2008-04-15 Kamilo Feher Data communication for wired and wireless communication
US7826581B1 (en) 2004-10-05 2010-11-02 Cypress Semiconductor Corporation Linearized digital phase-locked loop method for maintaining end of packet time linearity
US7421004B2 (en) * 2004-10-05 2008-09-02 Kamilo Feher Broadband, ultra wideband and ultra narrowband reconfigurable interoperable systems
US7298423B1 (en) * 2004-11-29 2007-11-20 Cirrus Logic, Inc. Time based digital FM demodulator
US9047860B2 (en) * 2005-01-31 2015-06-02 Skype Method for concatenating frames in communication system
TWI285568B (en) * 2005-02-02 2007-08-21 Dowa Mining Co Powder of silver particles and process
US7920658B2 (en) 2005-03-10 2011-04-05 Qualcomm Incorporated Efficient method to compute one shot frequency estimate
US8811468B2 (en) * 2005-05-26 2014-08-19 Broadcom Corporation Method and system for FM interference detection and mitigation
US7280810B2 (en) * 2005-08-03 2007-10-09 Kamilo Feher Multimode communication system
US10009956B1 (en) 2017-09-02 2018-06-26 Kamilo Feher OFDM, 3G and 4G cellular multimode systems and wireless mobile networks
US20070126552A1 (en) * 2005-12-06 2007-06-07 The Chamberlain Group, Inc. Secure spread spectrum-facilitated remote control signaling method and apparatus
US20080137715A1 (en) * 2005-12-06 2008-06-12 The Chamberlain Group, Inc. Secure spread spectrum-facilitated remote control signaling method and apparatus
US7535685B2 (en) * 2006-01-31 2009-05-19 Amperion, Inc. Radio frequency signal coupler, coupling system and method
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
US20080130607A1 (en) * 2006-11-30 2008-06-05 Junqiang Li Method and System for Multimode DC Offset Compensation
US7912437B2 (en) * 2007-01-09 2011-03-22 Freescale Semiconductor, Inc. Radio frequency receiver having dynamic bandwidth control and method of operation
US20080194288A1 (en) * 2007-02-12 2008-08-14 Broadcom Corporation Integrated circuit including packet network transceivers and fm receiver with fm antenna control
JP4874919B2 (en) * 2007-10-01 2012-02-15 株式会社東芝 Wireless device
US8331892B2 (en) * 2008-03-29 2012-12-11 Qualcomm Incorporated Method and system for DC compensation and AGC
US8625724B2 (en) * 2009-03-10 2014-01-07 Qualcomm Incorporated Adaptive tracking steps for time and frequency tracking loops
US8319673B2 (en) * 2010-05-18 2012-11-27 Linear Technology Corporation A/D converter with compressed full-scale range
GB201114079D0 (en) * 2011-06-13 2011-09-28 Neul Ltd Mobile base station
JP6037156B2 (en) * 2011-08-24 2016-11-30 ソニー株式会社 Encoding apparatus and method, and program
CN103905074A (en) * 2012-12-27 2014-07-02 深圳富泰宏精密工业有限公司 Wireless communication device
CN104104402A (en) * 2013-04-07 2014-10-15 深圳富泰宏精密工业有限公司 Electronic device
RU2552150C1 (en) * 2014-06-26 2015-06-10 федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" Method of detection of sine signal parameters
EP3260977B1 (en) * 2016-06-21 2019-02-20 Stichting IMEC Nederland A circuit and a method for processing data
RU2691384C1 (en) * 2018-07-23 2019-06-13 Акционерное общество "Концерн "Созвездие" Method of transmitting information by wideband signals
US10812216B2 (en) 2018-11-05 2020-10-20 XCOM Labs, Inc. Cooperative multiple-input multiple-output downlink scheduling
US10756860B2 (en) 2018-11-05 2020-08-25 XCOM Labs, Inc. Distributed multiple-input multiple-output downlink configuration
US10432272B1 (en) 2018-11-05 2019-10-01 XCOM Labs, Inc. Variable multiple-input multiple-output downlink user equipment
US10659112B1 (en) 2018-11-05 2020-05-19 XCOM Labs, Inc. User equipment assisted multiple-input multiple-output downlink configuration
CN113169764A (en) 2018-11-27 2021-07-23 艾斯康实验室公司 Non-coherent cooperative multiple-input multiple-output communication
US10756795B2 (en) 2018-12-18 2020-08-25 XCOM Labs, Inc. User equipment with cellular link and peer-to-peer link
US11063645B2 (en) 2018-12-18 2021-07-13 XCOM Labs, Inc. Methods of wirelessly communicating with a group of devices
US11330649B2 (en) 2019-01-25 2022-05-10 XCOM Labs, Inc. Methods and systems of multi-link peer-to-peer communications
US10756767B1 (en) 2019-02-05 2020-08-25 XCOM Labs, Inc. User equipment for wirelessly communicating cellular signal with another user equipment
US10686502B1 (en) 2019-04-29 2020-06-16 XCOM Labs, Inc. Downlink user equipment selection
US10735057B1 (en) 2019-04-29 2020-08-04 XCOM Labs, Inc. Uplink user equipment selection
US11411778B2 (en) 2019-07-12 2022-08-09 XCOM Labs, Inc. Time-division duplex multiple input multiple output calibration
US11381430B2 (en) 2020-03-19 2022-07-05 Cypress Semiconductor Corporation Phase/frequency tracking transceiver
US11411779B2 (en) 2020-03-31 2022-08-09 XCOM Labs, Inc. Reference signal channel estimation

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5718145A (en) * 1980-07-09 1982-01-29 Toshiba Corp Signal separation system
US4577157A (en) * 1983-12-12 1986-03-18 International Telephone And Telegraph Corporation Zero IF receiver AM/FM/PM demodulator using sampling techniques
US4603300A (en) * 1984-09-21 1986-07-29 General Electric Company Frequency modulation detector using digital signal vector processing
JPS61171207A (en) * 1985-01-25 1986-08-01 Nec Corp Receiver
US4680749A (en) * 1985-05-15 1987-07-14 General Electric Company Duplex radio transceiver having improved data/tone and audio modulation architecture
US4675882A (en) * 1985-09-10 1987-06-23 Motorola, Inc. FM demodulator
US4878035A (en) * 1988-05-27 1989-10-31 Wavetek Rf Products, Inc. Hybrid frequency shift keying modulator and method
CA1335612C (en) * 1988-06-28 1995-05-16 Genichi Fujiwara Voice frequency communication apparatus
US4944025A (en) * 1988-08-09 1990-07-24 At&E Corporation Direct conversion FM receiver with offset
US4985684A (en) * 1989-08-31 1991-01-15 Motorola, Inc. Fully integrated digital FM discriminator
US5003621A (en) * 1989-11-02 1991-03-26 Motorola, Inc. Direct conversion FM receiver
JP2912664B2 (en) * 1990-03-02 1999-06-28 正雄 中川 Mobile communication method
US5010585A (en) * 1990-06-01 1991-04-23 Garcia Rafael A Digital data and analog radio frequency transmitter
US5163159A (en) * 1990-07-30 1992-11-10 Motorola, Inc. Dual mode automatic frequency control
US5107225A (en) * 1990-11-30 1992-04-21 Qualcomm Incorporated High dynamic range closed loop automatic gain control circuit
US5212826A (en) * 1990-12-20 1993-05-18 Motorola, Inc. Apparatus and method of dc offset correction for a receiver
GB9107147D0 (en) * 1991-04-05 1991-05-22 Philips Electronic Associated Frequency tracking arrangement,corresponding method of frequency tracking and a radio receiver embodying such a method
JPH04310037A (en) * 1991-04-09 1992-11-02 Nec Corp Fsk receiver
US5309479A (en) * 1991-04-29 1994-05-03 Hughes Aircraft Company Low Cost Ku band transmitter
US5111163A (en) * 1991-05-06 1992-05-05 Hughes Aircraft Company Digital FM modulator
AU2140092A (en) * 1991-05-13 1992-12-30 Omnipoint Corporation Dual mode transmitter and receiver
US5414736A (en) * 1991-08-12 1995-05-09 Matsushita Electric Industrial Co., Ltd. FSK data receiving system
GB9209027D0 (en) * 1992-04-25 1992-06-17 British Aerospace Multi purpose digital signal regenerative processing apparatus
US5289464A (en) * 1992-09-21 1994-02-22 At&T Bell Laboratories Frequency-multiplexed cellular telephone cell site base station and method of operating the same
US5299228A (en) * 1992-12-28 1994-03-29 Motorola, Inc. Method and apparatus of reducing power consumption in a CDMA communication unit
US5475705A (en) * 1993-04-29 1995-12-12 Ericsson Ge Mobile Communications Inc. Demodulator for Manchester-coded FM signals
US5436955A (en) * 1993-07-30 1995-07-25 Hughes Aircraft Company Compatible analog channel unit for a digital cellular telephone system
US5422931A (en) * 1993-09-22 1995-06-06 Hughes Aircraft Company Dual mode portable cellular telephone having switch control of the rf signal path to effectuate power savings
US5539770A (en) * 1993-11-19 1996-07-23 Victor Company Of Japan, Ltd. Spread spectrum modulating apparatus using either PSK or FSK primary modulation
US5640385A (en) * 1994-01-04 1997-06-17 Motorola, Inc. Method and apparatus for simultaneous wideband and narrowband wireless communication
US5451948A (en) * 1994-02-28 1995-09-19 Cubic Communications, Inc. Apparatus and method for combining analog and digital automatic gain control in receivers with digital signal processing
ZA95605B (en) * 1994-04-28 1995-12-20 Qualcomm Inc Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver
US5436590A (en) * 1994-08-25 1995-07-25 Northern Telecom Limited Digital FSK demodulator with automatic offset cancellation

Also Published As

Publication number Publication date
WO1996020540A3 (en) 1996-09-06
CN1098569C (en) 2003-01-08
IL116475A0 (en) 1996-03-31
IL116475A (en) 1999-10-28
CN1176715A (en) 1998-03-18
MX9704695A (en) 1997-10-31
JP3436372B2 (en) 2003-08-11
CA2208081C (en) 2004-05-25
EP0799530B1 (en) 2004-04-07
RU2142205C1 (en) 1999-11-27
MY114286A (en) 2002-09-30
AR000415A1 (en) 1997-06-18
EP0799530A2 (en) 1997-10-08
ES2222469T3 (en) 2005-02-01
HK1003689A1 (en) 1998-11-06
ATE264025T1 (en) 2004-04-15
FI972590A (en) 1997-08-25
KR100427836B1 (en) 2004-10-14
DE69532863T2 (en) 2005-03-31
WO1996020540A2 (en) 1996-07-04
DE69532863D1 (en) 2004-05-13
BR9510534A (en) 1998-07-14
ZA9510509B (en) 1996-05-30
TW294867B (en) 1997-01-01
AU700691B2 (en) 1999-01-14
JPH10511525A (en) 1998-11-04
FI972590A0 (en) 1997-06-17
US5757858A (en) 1998-05-26
AU4599896A (en) 1996-07-19

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