CA2239681A1 - In-phase and quadrature signal regeneration - Google Patents

In-phase and quadrature signal regeneration

Info

Publication number
CA2239681A1
CA2239681A1 CA002239681A CA2239681A CA2239681A1 CA 2239681 A1 CA2239681 A1 CA 2239681A1 CA 002239681 A CA002239681 A CA 002239681A CA 2239681 A CA2239681 A CA 2239681A CA 2239681 A1 CA2239681 A1 CA 2239681A1
Authority
CA
Canada
Prior art keywords
signal
signals
phase
subspace
regeneration
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
CA002239681A
Other languages
French (fr)
Other versions
CA2239681C (en
Inventor
Xinping Huang
Mario Caron
Daniel J. Hindson
Michel De Leseleuc
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.)
Canada, AS REPRESENTED BY MINISTE
Original Assignee
Canada, AS REPRESENTED BY MINISTE
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 Canada, AS REPRESENTED BY MINISTE filed Critical Canada, AS REPRESENTED BY MINISTE
Publication of CA2239681A1 publication Critical patent/CA2239681A1/en
Application granted granted Critical
Publication of CA2239681C publication Critical patent/CA2239681C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/008—Compensating DC offsets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/288—Coherent receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/288—Coherent receivers
    • G01S7/2886—Coherent receivers using I/Q processing
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0047—Offset of DC voltage or frequency

Abstract

The present invention relates to the regeneration of in-phase (I) and quadrature (Q) signals in electronic devices commonly used in communication, radar and instrumentation electronics. The original signal of interest comprises two orthogonal components that are mathematically modelled using complex values, which are then decomposed into a real (I) and an imaginary (Q) component. These two components are orthogonal to each other and represent fully the signal of interest. The present method adaptively compensates for the gain and phase imbalances and DC offsets in I and Q signal regeneration. First, 3 phase shifted versions of the received signal, either down-converted to some intermediate frequency (IF) or at baseband, are digitised. Although the optimum phase shift between each version is 360°/3, any phase shift different than 0° and 180° is acceptable and no a priori knowledge of the phase shifts is required.
Based on these 3 digital signals representing 3 linear combinations of the I&Q
signal components, the regeneration algorithm projects these signals into a 3-dimensional space composed of the I signal subspace, the Q signal subspace, and another subspace, referred to as the noise subspace. The projection is performed using an eigen-decomposition method where the eigenvectors associated with the I and Q signal subspaces provide linear combination coefficients for regenerating the I&Q signals. Compensation for DC offsets is performed by removing an average DC offset on the phase and gain corrected I&Q signals. The regenerated digital I and Q
signals are then converted back to analog signals, when required.
CA002239681A 1997-06-10 1998-06-05 In-phase and quadrature signal regeneration Expired - Fee Related CA2239681C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4904997P 1997-06-10 1997-06-10
US60/049,049 1997-06-10

Publications (2)

Publication Number Publication Date
CA2239681A1 true CA2239681A1 (en) 1998-12-10
CA2239681C CA2239681C (en) 2007-08-21

Family

ID=21957798

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002239681A Expired - Fee Related CA2239681C (en) 1997-06-10 1998-06-05 In-phase and quadrature signal regeneration

Country Status (4)

Country Link
US (1) US6337888B1 (en)
EP (1) EP0884836B1 (en)
CA (1) CA2239681C (en)
DE (1) DE69841295D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115800287A (en) * 2022-10-27 2023-03-14 深圳市国电科技通信有限公司 Low-voltage distribution area topology identification method based on threshold segmentation clustering

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999033166A1 (en) * 1997-12-18 1999-07-01 Sony International (Europe) Gmbh N-port direct receiver
DE69829757T2 (en) 1998-12-18 2006-01-12 Sony International (Europe) Gmbh Three-gate circuit receiver
DE69924978T2 (en) * 1999-05-27 2006-02-02 Sony International (Europe) Gmbh Down-converter and demodulator with a three-port circuit arrangement
EP1061660B1 (en) * 1999-06-16 2006-08-09 Sony Deutschland GmbH N-port receiver with RF/LO isolation
EP1067675B1 (en) * 1999-07-08 2005-04-27 Sony International (Europe) GmbH Calibration of a N-port receiver
EP1168742B1 (en) * 2000-06-28 2008-03-19 Sony Deutschland GmbH Modulation identification device
JP2004503172A (en) 2000-07-07 2004-01-29 ソニー株式会社 Universal platform for software defined radio
DE60027284T2 (en) * 2000-07-11 2006-08-31 Sony Deutschland Gmbh Quadrature demodulator using power sensors
EP1189338A1 (en) * 2000-09-06 2002-03-20 Sony International (Europe) GmbH I/Q demodulator device with three power detectors and two A/D converters
EP1326326A4 (en) * 2000-10-12 2005-02-09 Sony Corp Demodulator and receiver
US6711219B2 (en) * 2000-12-04 2004-03-23 Tensorcomm, Incorporated Interference cancellation in a signal
US6977977B1 (en) * 2001-02-20 2005-12-20 Comsys Communication & Signal Processing Ltd. Compensation of I/Q gain mismatch in a communications receiver
US20050111587A1 (en) * 2001-11-30 2005-05-26 Masayoshi Abe Demodulator and receiver using same
US6680691B2 (en) 2002-05-13 2004-01-20 Honeywell International Inc. Methods and apparatus for accurate phase detection
US6674397B2 (en) 2002-05-13 2004-01-06 Honeywell International Inc. Methods and apparatus for minimum computation phase demodulation
US6856279B2 (en) * 2002-05-13 2005-02-15 Honeywell International Inc. Methods and apparatus for determining an interferometric angle to a target in body coordinates
US6734820B2 (en) 2002-05-13 2004-05-11 Honeywell International Inc. Methods and apparatus for conversion of radar return data
US6803878B2 (en) 2002-05-13 2004-10-12 Honeywell International Inc. Methods and apparatus for terrain correlation
US6768469B2 (en) 2002-05-13 2004-07-27 Honeywell International Inc. Methods and apparatus for radar signal reception
US6950056B2 (en) * 2002-05-13 2005-09-27 Honeywell International Inc. Methods and apparatus for determination of a filter center frequency
US6744401B2 (en) 2002-05-13 2004-06-01 Honeywell International Inc. Methods and apparatus for radar data processing
US6639545B1 (en) 2002-05-13 2003-10-28 Honeywell International Inc. Methods and apparatus to determine a target location in body coordinates
DE60215923T2 (en) * 2002-06-20 2007-05-10 Sony Deutschland Gmbh I / Q demodulator using a six-gate circuit
DE60224929T2 (en) * 2002-09-16 2009-01-29 Sony Deutschland Gmbh Adaptive self-calibration procedure for a quadrature demodulator of a five-port receiver
KR100457924B1 (en) * 2002-10-07 2004-11-18 한국전자통신연구원 Quadrature demodulating apparatus for compensating gain and phase imbalances between in-phase and quadrature-phase components
US7369813B2 (en) * 2003-05-14 2008-05-06 Telefonaktiebolaget L M Ericsson (Publ) Fast calibration of electronic components
US7310504B2 (en) * 2004-03-26 2007-12-18 Agilent Technologies, Inc. IF frequency response characterization employing overlapping frequency bands
US7463866B1 (en) 2005-04-13 2008-12-09 Rf Micro Devices, Inc. I/Q mismatch calibration of direct conversion transceivers using the OFDM short training sequence
US7395202B2 (en) * 2005-06-09 2008-07-01 Motorola, Inc. Method and apparatus to facilitate vocoder erasure processing
KR100843421B1 (en) * 2007-02-27 2008-07-03 삼성전기주식회사 I/q regeneration of five-port direct receiver
US7848450B2 (en) * 2007-03-22 2010-12-07 Texas Instruments Incorporated Methods and apparatus to pre-compensate for I/Q distortion in quadrature transmitters
KR100946124B1 (en) * 2008-12-08 2010-03-10 삼성전기주식회사 In-phase signal and quadrature signal generator of multi-port network and method thereof
US8750441B2 (en) * 2010-12-20 2014-06-10 Texas Instruments Incorporated Signal cancellation to reduce phase noise, period jitter, and other contamination in local oscillator, frequency timing, or other timing generators or signal sources
US9484968B2 (en) 2012-10-12 2016-11-01 Innoventure L.P. Post conversion mixing
US9490944B2 (en) 2012-10-12 2016-11-08 Innoventure L.P. Phase sector based RF signal acquisition
US9225368B2 (en) 2012-10-12 2015-12-29 Innoventure L.P. Periodic time segment sequence based signal generation
US9484969B2 (en) 2012-10-12 2016-11-01 Innoventure L.P. Delta-pi signal acquisition
US9264268B2 (en) 2012-10-12 2016-02-16 Innoventure L.P. Periodic time segment sequence based decimation
WO2014172294A1 (en) * 2013-04-15 2014-10-23 Aoptix Technologies, Inc. Carrier frequency and phase recovery in quadrature encoded e-band communications
US11054499B2 (en) * 2016-01-22 2021-07-06 Texas Instruments Incorporated Digital compensation for mismatches in a radar system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5095536A (en) 1990-03-23 1992-03-10 Rockwell International Corporation Direct conversion receiver with tri-phase architecture
US5263196A (en) 1990-11-19 1993-11-16 Motorola, Inc. Method and apparatus for compensation of imbalance in zero-if downconverters
US5461646A (en) * 1993-12-29 1995-10-24 Tcsi Corporation Synchronization apparatus for a diversity receiver
JP2850942B2 (en) 1994-07-13 1999-01-27 日本電気株式会社 Demodulator
US5822368A (en) * 1996-04-04 1998-10-13 Lucent Technologies Inc. Developing a channel impulse response by using distortion
FI102702B (en) 1996-05-03 1999-01-29 Nokia Mobile Phones Ltd A method for implementing a direct conversion receiver on a 6-port circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115800287A (en) * 2022-10-27 2023-03-14 深圳市国电科技通信有限公司 Low-voltage distribution area topology identification method based on threshold segmentation clustering
CN115800287B (en) * 2022-10-27 2023-10-27 深圳市国电科技通信有限公司 Low-voltage area topology identification method based on threshold segmentation clustering

Also Published As

Publication number Publication date
EP0884836B1 (en) 2009-11-25
EP0884836A1 (en) 1998-12-16
DE69841295D1 (en) 2010-01-07
US6337888B1 (en) 2002-01-08
CA2239681C (en) 2007-08-21

Similar Documents

Publication Publication Date Title
CA2239681A1 (en) In-phase and quadrature signal regeneration
US7151917B2 (en) Apparatus and method for deriving a digital image correction factor in a receiver
US8855580B2 (en) Methods and apparatus for reducing own-transmitter interference in low-IF and zero-IF receivers
US7627302B2 (en) Apparatus and method for digital image correction in a receiver
CA2110881C (en) Adaptive equalizer capable of compensating for carrier frequency offset
US6606484B1 (en) Distortion correction circuit for direct conversion receiver
EP1339197A1 (en) I/Q Mismatch compensation in an OFDM receiver in presence of frequency offset
EP2316166A2 (en) Own transmitter interference tolerant transceiver and receiving methods
EP2449687A1 (en) Method and apparatus for compensating for transceiver impairments
US20090122918A1 (en) Methods for Compensating for I/Q Imbalance in OFDM Systems
KR20050030422A (en) Appratus and its method for i/q imbalance compensation by using variable loop gain in demodulator
KR100524326B1 (en) Apparatus for extracting the I/Q Mismatch caused by Up-conversion of direct conversion low IF scheme, and System and Method for Direct Conversion Digital Quadrature Transmission
CA2164027A1 (en) Digital Radio Receiver
JP3440095B1 (en) Data transmission device and data transmission method
EP1693954B1 (en) Demodulation circuit for use in receiver using IF sampling scheme
CN106908809B (en) Anti-interference antenna of satellite system
GB2387284A (en) Demodulating carriers in quadrature
JP2008527885A (en) Low intermediate frequency receiver and sampling method thereof
US20110051843A1 (en) Transmission circuit
JP4214635B2 (en) Digital radio equipment
US6873663B1 (en) Reception of M-ary PSK-modulated signals
CN101795252A (en) Direct variable frequency modulation method and modulation device thereof
KR100764522B1 (en) Multiplier for multiplying complex signals
US7957491B1 (en) Digital technique of compensating mismatches between in phase and quadrature channels
US7705760B2 (en) Method and device for the filtering and analogue/digital conversion of analogue signal

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed