CA2184393A1 - Receiver based methods and devices for combating co-channel ntsc inference in digital transmission - Google Patents

Receiver based methods and devices for combating co-channel ntsc inference in digital transmission

Info

Publication number
CA2184393A1
CA2184393A1 CA002184393A CA2184393A CA2184393A1 CA 2184393 A1 CA2184393 A1 CA 2184393A1 CA 002184393 A CA002184393 A CA 002184393A CA 2184393 A CA2184393 A CA 2184393A CA 2184393 A1 CA2184393 A1 CA 2184393A1
Authority
CA
Canada
Prior art keywords
combating
inference
devices
based methods
digital transmission
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
CA002184393A
Other languages
French (fr)
Other versions
CA2184393C (en
Inventor
Monisha Ghosh Ghosh
Johannes Ijzebrand Tichelaar
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.)
Koninklijke Philips NV
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 CA2184393A1 publication Critical patent/CA2184393A1/en
Application granted granted Critical
Publication of CA2184393C publication Critical patent/CA2184393C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • 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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof

Abstract

A device and method for removing signal interference from a digital signal by using an adaptive filter which tunes to the periodic components of the interfering signal. The output of the adaptive filter is then subtracted from the received signal to produce an error signal. This error signal is then used to recursively update the taps of the adaptive filter. The invention also relates to the use of the adaptive filter in conjunction with a DFE.
CA002184393A 1994-12-29 1995-12-15 Receiver based methods and devices for combating co-channel ntsc inference in digital transmission Expired - Fee Related CA2184393C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/366,138 US5572262A (en) 1994-12-29 1994-12-29 Receiver based methods and devices for combating co-channel NTSC interference in digital transmission
US08/366,138 1994-12-29
PCT/IB1995/001133 WO1996021304A2 (en) 1994-12-29 1995-12-15 Combating signal interference in digital transmission

Publications (2)

Publication Number Publication Date
CA2184393A1 true CA2184393A1 (en) 1996-07-11
CA2184393C CA2184393C (en) 2006-07-04

Family

ID=23441813

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002184393A Expired - Fee Related CA2184393C (en) 1994-12-29 1995-12-15 Receiver based methods and devices for combating co-channel ntsc inference in digital transmission

Country Status (6)

Country Link
US (2) US5572262A (en)
EP (1) EP0748551B1 (en)
JP (1) JP3658409B2 (en)
CA (1) CA2184393C (en)
DE (1) DE69530837T2 (en)
WO (1) WO1996021304A2 (en)

Families Citing this family (101)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5857998A (en) * 1994-06-30 1999-01-12 Boston Scientific Corporation Stent and therapeutic delivery system
US5572262A (en) * 1994-12-29 1996-11-05 Philips Electronics North America Corporation Receiver based methods and devices for combating co-channel NTSC interference in digital transmission
KR0172885B1 (en) * 1995-08-25 1999-03-20 구자홍 Integrated trellis decoder for hdtv
US5838729A (en) * 1996-04-09 1998-11-17 Thomson Multimedia, S.A. Multiple mode trellis decoder for a digital signal processing system
KR100366698B1 (en) * 1996-06-07 2003-03-10 삼성전자 주식회사 Method and device for detecting signal of data storing device
US6952444B1 (en) * 1996-07-19 2005-10-04 Texas Instruments Incorporated Blind DFE and phase correction
US5878086A (en) * 1996-09-19 1999-03-02 Philips Electronics North America Corporation Method and apparatus for producing a deterministic sequence from an IIR filter
US6023306A (en) * 1996-10-02 2000-02-08 Samsung Electronics Co. Ltd. NTSC interference detectors using comb filters that suppress digital TV pilot carrier for NTSC extraction
US5742642A (en) * 1996-10-29 1998-04-21 Telefonaktiebolaget Lm Ericsson Signal processing method and apparatus for reducing equalizer error
US6177951B1 (en) * 1996-12-18 2001-01-23 Philips Electronics North America Corporation Digital receiver which utilizes a rejection filter for cancellation of known co-channel interference and an equalizer for equalizing multipath channels without attempting to equalize the co-channel interference
US5923378A (en) * 1997-03-21 1999-07-13 Samsung Electronics Co., Ltd. Using intercarrier signals for detecting NTSC interference in digital TV receivers
US6011813A (en) * 1997-06-23 2000-01-04 Philips Electronics North America Corporation Blind equalization method and apparatus having reduced complexity
US6330275B1 (en) 1997-06-23 2001-12-11 Paradyne Corporation Method and apparatus for overcoming periodic disturbances in digital subscriber loops
KR100247967B1 (en) * 1997-07-09 2000-03-15 윤종용 Co-channel interference detector and method terefor
KR100238301B1 (en) * 1997-07-10 2000-01-15 윤종용 Co-channel interference detector and method therefor
US6011814A (en) * 1997-09-30 2000-01-04 Paradyne Corporation Adaptive comb filter and decision feedback equalizer for noise suppression
US6285709B1 (en) * 1997-10-31 2001-09-04 3 Com Corporation Error filtering in a hybrid equalizer system
ES2241107T3 (en) * 1997-11-03 2005-10-16 Alcatel METHOD FOR THE DIGITAL TRANSMISSION OF INFORMATION.
DE19803235A1 (en) * 1998-01-28 1999-07-29 Siemens Ag Noise reduction device for receiver of data transmission system
WO1999050679A2 (en) * 1998-03-30 1999-10-07 3Com Corporation Low complexity frequency estimator and interference cancellation method and device
US6141783A (en) * 1998-04-10 2000-10-31 International Business Machines Corporation Error propagation limiting encoder/decoder for multilevel decision feedback equalization
US6680971B1 (en) * 1998-05-18 2004-01-20 Sarnoff Corporation Passband equalizer for a vestigial sideband signal receiver
US6724844B1 (en) 1998-06-30 2004-04-20 Koninklijke Philips Electronics N.V. Method and device for improving DFE performance in a trellis-coded system
GB9815907D0 (en) * 1998-07-21 1998-09-16 British Broadcasting Corp Improvements in colour displays
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
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
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6327302B1 (en) * 1998-08-28 2001-12-04 Ericsson Inc. Fast adaptive equalizer for wireless communication systems
US6434233B1 (en) * 1998-09-30 2002-08-13 Conexant Systems, Inc. Method and apparatus for canceling periodic interference signals in a digital data communication system
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US6438164B2 (en) * 1998-11-03 2002-08-20 Broadcom Corporation Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter 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
US6526093B1 (en) 1999-03-04 2003-02-25 Mitsubishi Electric Research Laboratories, Inc Method and apparatus for equalizing a digital signal received via multiple transmission paths
JP3859386B2 (en) * 1999-03-31 2006-12-20 三菱電機株式会社 Waveform equalizer, waveform equalizer, and receiver
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
JP3841588B2 (en) * 1999-05-19 2006-11-01 富士通株式会社 Error propagation detection suppression method in multi-value decision feedback equalization and storage device using the same
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
GB2355629B (en) * 1999-10-18 2004-02-11 Mitel Corp Precursor decision feedback equalizer (PDFE)
WO2001030011A1 (en) * 1999-10-21 2001-04-26 Koninklijke Philips Electronics N.V. An adaptive digital beamforming receiver to improve signal reception
US6590933B1 (en) * 1999-12-27 2003-07-08 Tioga Technologies Ltd. Adaptive decision-feedback equalizer with error-predictor for improved convergence
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US6973144B1 (en) * 2000-09-12 2005-12-06 Lucent Technologies Inc. Apparatus and method for channel estimation used for link adaption with error feedback
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US6934345B2 (en) * 2001-01-17 2005-08-23 Adtran, Inc. Apparatus, method and system for correlated noise reduction in a trellis coded environment
DE10101950C1 (en) * 2001-01-17 2003-01-23 Infineon Technologies Ag Decision feedback equalizer
US20020186764A1 (en) * 2001-04-06 2002-12-12 Sarnoff Corporation Method and apparatus for equalizing a radio frequency signal
US6734920B2 (en) 2001-04-23 2004-05-11 Koninklijke Philips Electronics N.V. System and method for reducing error propagation in a decision feedback equalizer of ATSC VSB receiver
US7349469B1 (en) * 2001-08-17 2008-03-25 Ati Research, Inc. DC offset correction for constant modulus equalization
JP3856101B2 (en) 2001-09-03 2006-12-13 日本電気株式会社 Optical receiver having reception waveform shaping function
US6956914B2 (en) 2001-09-19 2005-10-18 Gennum Corporation Transmit amplitude independent adaptive equalizer
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US20030107986A1 (en) * 2001-12-11 2003-06-12 Sarnoff Corporation Method and apparatus for demodulating orthogonal frequency division multiplexed signals
US7027538B2 (en) 2002-02-14 2006-04-11 Koninklijke Philips Electronics N.V. Method and system for joint decision feedback equalization and complementary code key decoding using a trellis
US7092036B2 (en) * 2002-04-16 2006-08-15 Thomson Licensing Equalizer system including a comb filter in an HDTV system
US7107303B2 (en) * 2002-05-23 2006-09-12 Analog Devices, Inc. Sparse echo canceller
EP1540817A4 (en) * 2002-06-12 2009-05-27 Dsp Group Inc Cck demodulation via symbol decision feedback equalizer
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
CN1685626A (en) * 2002-09-27 2005-10-19 肯奈克斯特公司 Method and system for reducing interferences due to handshake tones
US7545859B2 (en) * 2004-01-14 2009-06-09 L-3 Communications Integrated Systems L.P. Adaptive channel equalization technique and method for wideband passive digital receivers
US7327808B2 (en) * 2004-03-17 2008-02-05 Faraday Technology Corp. Pipelined adaptive decision feedback equalizer
US7680652B2 (en) * 2004-10-26 2010-03-16 Qnx Software Systems (Wavemakers), Inc. Periodic signal enhancement system
US7610196B2 (en) * 2004-10-26 2009-10-27 Qnx Software Systems (Wavemakers), Inc. Periodic signal enhancement system
US8306821B2 (en) * 2004-10-26 2012-11-06 Qnx Software Systems Limited Sub-band periodic signal enhancement system
US7716046B2 (en) 2004-10-26 2010-05-11 Qnx Software Systems (Wavemakers), Inc. Advanced periodic signal enhancement
US8543390B2 (en) 2004-10-26 2013-09-24 Qnx Software Systems Limited Multi-channel periodic signal enhancement system
US7949520B2 (en) 2004-10-26 2011-05-24 QNX Software Sytems Co. Adaptive filter pitch extraction
US8170879B2 (en) 2004-10-26 2012-05-01 Qnx Software Systems Limited Periodic signal enhancement system
US7599431B1 (en) * 2004-11-24 2009-10-06 Xilinx, Inc. Combined decision feedback equalization and linear equalization
US7369155B2 (en) * 2005-05-16 2008-05-06 Mediatek Incorporation Apparatus and method for rejecting co-channel interference signal
US8850154B2 (en) 2007-09-11 2014-09-30 2236008 Ontario Inc. Processing system having memory partitioning
US8904400B2 (en) 2007-09-11 2014-12-02 2236008 Ontario Inc. Processing system having a partitioning component for resource partitioning
US8694310B2 (en) 2007-09-17 2014-04-08 Qnx Software Systems Limited Remote control server protocol system
US8209514B2 (en) 2008-02-04 2012-06-26 Qnx Software Systems Limited Media processing system having resource partitioning
CN101662576B (en) * 2008-08-27 2011-07-20 扬智科技股份有限公司 Signal processing circuit and method suitable for eliminating co-channel interference
US8625704B1 (en) 2008-09-25 2014-01-07 Aquantia Corporation Rejecting RF interference in communication systems
US9912375B1 (en) 2008-09-25 2018-03-06 Aquantia Corp. Cancellation of alien interference in communication systems
GB2479173A (en) 2010-03-31 2011-10-05 Sony Corp Reducing interference at a television receiver by identifying channel maps
US9118469B2 (en) 2010-05-28 2015-08-25 Aquantia Corp. Reducing electromagnetic interference in a received signal
US8724678B2 (en) 2010-05-28 2014-05-13 Aquantia Corporation Electromagnetic interference reduction in wireline applications using differential signal compensation
US8891595B1 (en) 2010-05-28 2014-11-18 Aquantia Corp. Electromagnetic interference reduction in wireline applications using differential signal compensation
US8792597B2 (en) 2010-06-18 2014-07-29 Aquantia Corporation Reducing electromagnetic interference in a receive signal with an analog correction signal
US8861663B1 (en) * 2011-12-01 2014-10-14 Aquantia Corporation Correlated noise canceller for high-speed ethernet receivers
US8780277B2 (en) 2012-05-22 2014-07-15 Sony Corporation Television receiver, television controller circuitry and method
GB2502297A (en) * 2012-05-22 2013-11-27 Sony Corp Television receiver for suppressing signals on a frequency channel when TV signals are absent
US8929468B1 (en) 2012-06-14 2015-01-06 Aquantia Corp. Common-mode detection with magnetic bypass
US9602317B1 (en) * 2015-10-12 2017-03-21 Qualcomm Incorporated Apparatus and method for combining currents from passive equalizer in sense amplifier
US9843464B2 (en) 2015-10-14 2017-12-12 Maxlinear Asia Singapore Private Limited Wireless backhaul

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889108A (en) * 1974-07-25 1975-06-10 Us Navy Adaptive low pass filter
US4524424A (en) * 1982-02-18 1985-06-18 Rockwell International Corporation Adaptive spectrum shaping filter
NL8700125A (en) * 1987-01-20 1988-08-16 Philips Nv DEVICE FOR COMBATING INTERSYMBOL INTERFERENCE AND NOISE.
US5031194A (en) * 1989-08-11 1991-07-09 Bell Communications Research, Inc. Wideband digital equalizers for subscriber loops
CA2052906A1 (en) * 1990-10-09 1992-04-10 Antoine Chouly System for modulating/demodulating digital signals transmitted with encoded modulation
US5086340A (en) * 1990-10-19 1992-02-04 Zenith Electronics Corporation Co-channel interference reduction system for digital high definition television
US5195106A (en) * 1990-11-14 1993-03-16 Motorola, Inc. Method for channel adaptive detecting/equalize
DE4038251A1 (en) * 1990-11-30 1992-06-04 Philips Patentverwaltung Max probability receiver e.g. for mobile communications
FR2674709A1 (en) * 1991-03-29 1992-10-02 Philips Electronique Lab MULTI-STAGE DECODER.
CA2076099A1 (en) * 1991-09-03 1993-03-04 Howard Leroy Lester Automatic simulcast alignment
US5307517A (en) * 1991-10-17 1994-04-26 Rich David A Adaptive notch filter for FM interference cancellation
JPH05183456A (en) * 1991-12-27 1993-07-23 Nec Corp Control signal generator
JP2762836B2 (en) * 1992-04-09 1998-06-04 日本電気株式会社 Interference wave canceller
JP2756629B2 (en) * 1992-11-19 1998-05-25 本田技研工業株式会社 Adaptive control device
US5453797A (en) * 1993-02-22 1995-09-26 Massachusetts Institute Of Technology Method and apparatus for decoding broadcast digital HDTV in the presence of quasi-cyclostationary interference
EP0629080B1 (en) * 1993-06-09 2000-02-23 STMicroelectronics S.r.l. Adaptive method to remove ghosts in video signals
US5452015A (en) * 1994-02-10 1995-09-19 Philips Electronics North America Corporation Method and apparatus for combating co-channel NTSC interference for digital TV transmission
US5539774A (en) * 1994-06-15 1996-07-23 International Business Machines Corporation Dual decision equalization method and device
US5550596A (en) * 1994-11-25 1996-08-27 Thomson Multimedia Sa Digital television signal processing system including a co-channel rejection filter
US5572262A (en) * 1994-12-29 1996-11-05 Philips Electronics North America Corporation Receiver based methods and devices for combating co-channel NTSC interference in digital transmission

Also Published As

Publication number Publication date
DE69530837D1 (en) 2003-06-26
JPH10500830A (en) 1998-01-20
JP3658409B2 (en) 2005-06-08
EP0748551A1 (en) 1996-12-18
EP0748551B1 (en) 2003-05-21
CA2184393C (en) 2006-07-04
DE69530837T2 (en) 2004-02-26
MX9603694A (en) 1997-07-31
US5572262A (en) 1996-11-05
WO1996021304A2 (en) 1996-07-11
US5777692A (en) 1998-07-07
WO1996021304A3 (en) 1996-09-06

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