WO1997039550A3 - Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system - Google Patents

Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system Download PDF

Info

Publication number
WO1997039550A3
WO1997039550A3 PCT/IB1997/000361 IB9700361W WO9739550A3 WO 1997039550 A3 WO1997039550 A3 WO 1997039550A3 IB 9700361 W IB9700361 W IB 9700361W WO 9739550 A3 WO9739550 A3 WO 9739550A3
Authority
WO
WIPO (PCT)
Prior art keywords
sequence
estimation
receiver
estimation method
sample values
Prior art date
Application number
PCT/IB1997/000361
Other languages
French (fr)
Other versions
WO1997039550A2 (en
Inventor
Raimund Meyer
Robert Fischer
Wolfgang Gerstacker
Johannes Huber
Peter Schramm
Original Assignee
Philips Electronics Nv
Philips Patentverwaltung
Philips Norden Ab
Raimund Meyer
Robert Fischer
Wolfgang Gerstacker
Johannes Huber
Peter Schramm
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 Philips Electronics Nv, Philips Patentverwaltung, Philips Norden Ab, Raimund Meyer, Robert Fischer, Wolfgang Gerstacker, Johannes Huber, Peter Schramm filed Critical Philips Electronics Nv
Priority to EP97908460A priority Critical patent/EP0843924B1/en
Priority to US08/973,023 priority patent/US6044111A/en
Priority to JP53690297A priority patent/JP4555403B2/en
Priority to DE69729709T priority patent/DE69729709T2/en
Publication of WO1997039550A2 publication Critical patent/WO1997039550A2/en
Publication of WO1997039550A3 publication Critical patent/WO1997039550A3/en

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
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • 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
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • H04L25/03248—Arrangements for operating in conjunction with other apparatus
    • H04L25/03254—Operation with other circuitry for removing intersymbol interference
    • H04L25/03261—Operation with other circuitry for removing intersymbol interference with impulse-response shortening filters

Abstract

The invention relates to a digital transmission system comprising a receiver, which receiver includes an equalizer for estimating transmitted binary symbols from a sequence of sample values (6) of a received signal distorted by a transmission channel, by means of a reduced-state sequence estimation method or reduced-state single symbol estimation method (11). To provide a receiver featuring a high reliability combined with a clear state reduction of the estimation method, a minimum-phase substitute system (14) distorts the sample values received after a known training sequence (27) in the sequence of sample values (6) in the received order, and a maximum-phase substitute system (14) distorts the sample values (6) received before a known training sequence (27) and to be processed in reverse order for forming an estimate (11) for a received signal. The number of coefficients of the impulse response which are reduced by the state reduction and used for the estimation, render the estimation inaccurate. In a minimum-phase system the first coefficients of the impulse response of the substitute system have maximum energy with an unchanged frequency response. When these coefficients transformed in this manner are used for the state reduction, nearly all the information is used for the estimation. This achieves a high reliability of the sequence estimation as is achieved when all the states are used.
PCT/IB1997/000361 1996-04-12 1997-04-07 Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system WO1997039550A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP97908460A EP0843924B1 (en) 1996-04-12 1997-04-07 Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system
US08/973,023 US6044111A (en) 1996-04-12 1997-04-07 Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system
JP53690297A JP4555403B2 (en) 1996-04-12 1997-04-07 Equalizer with State Reduction Sequence Estimation Method for Digital Transmission Equipment Receiver
DE69729709T DE69729709T2 (en) 1996-04-12 1997-04-07 DECOER WITH A FOLLOWING METHOD OF STATE REDUCTION FOR A RECEIVER IN A DIGITAL TRANSMISSION SYSTEM

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614544.9 1996-04-12
DE19614544A DE19614544C1 (en) 1996-04-12 1996-04-12 Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system

Publications (2)

Publication Number Publication Date
WO1997039550A2 WO1997039550A2 (en) 1997-10-23
WO1997039550A3 true WO1997039550A3 (en) 1997-11-20

Family

ID=7791125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1997/000361 WO1997039550A2 (en) 1996-04-12 1997-04-07 Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system

Country Status (5)

Country Link
US (1) US6044111A (en)
EP (1) EP0843924B1 (en)
JP (1) JP4555403B2 (en)
DE (2) DE19614544C1 (en)
WO (1) WO1997039550A2 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2776873B1 (en) * 1998-03-25 2000-06-02 Matra Communication METHOD OF DETECTING A SEQUENCE OF DISCRETE SYMBOLS FROM AN OBSERVATION SIGNAL, AND VITERBI PROCESSOR IMPLEMENTING SUCH A METHOD
EP0977384A1 (en) * 1998-07-31 2000-02-02 Hewlett-Packard Company Method and apparatus for measuring spectral energy of mobile handset
US6128765A (en) * 1998-08-20 2000-10-03 General Electric Company Maximum A posterior estimator with fast sigma calculator
US6263467B1 (en) * 1998-08-20 2001-07-17 General Electric Company Turbo code decoder with modified systematic symbol transition probabilities
JP2002525917A (en) * 1998-09-15 2002-08-13 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Transmission system with improved signal conditioning means
US6765894B1 (en) 1999-07-05 2004-07-20 Matsushita Electric Industrial Co, Ltd. Communication terminal apparatus and base station apparatus
US7372825B1 (en) * 1999-07-13 2008-05-13 Texas Instruments Incorporated Wireless communications system with cycling of unique cell bit sequences in station communications
US6608862B1 (en) * 1999-08-20 2003-08-19 Ericsson, Inc. Method and apparatus for computing prefilter coefficients
DE60040934D1 (en) * 2000-04-04 2009-01-08 Mitsubishi Electric Inf Tech A base station for transmitting a word representative of the number of spreading codes allocated to the mobile stations in communication with the base station
GB2362073B (en) * 2000-05-03 2003-12-17 Siemens Ag Equaliser and method of state reduction therefor
US7006581B2 (en) * 2000-05-25 2006-02-28 Vigil Armando J Method for demodulating a digital signal subjected to multipath propagation impairment and an associated receiver
US6636174B2 (en) * 2000-06-06 2003-10-21 Altratek Inc. System and method for detection and tracking of targets
EP1162802B1 (en) * 2000-06-08 2005-08-17 STMicroelectronics N.V. Equaliser using a transformed channel.
US6862326B1 (en) 2001-02-20 2005-03-01 Comsys Communication & Signal Processing Ltd. Whitening matched filter for use in a communications receiver
US7079601B2 (en) 2001-06-19 2006-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Efficient channel estimation in a digital communications system
EP1284562A1 (en) 2001-08-16 2003-02-19 Alcatel Method, receiver and receiver station for compensating a received signal
US7221701B2 (en) * 2002-08-28 2007-05-22 Altratek, Inc. System and method for CDMA communications
US7187736B2 (en) * 2003-02-13 2007-03-06 Motorola Inc. Reducing interference in a GSM communication system
US7502426B2 (en) 2003-09-09 2009-03-10 Interdigital Technology Corporation Method for estimating signal magnitude, noise power, and signal-to-noise ratio of received signals
US6944245B2 (en) * 2003-10-17 2005-09-13 Motorola, Inc. Multi-pass interference reduction in a GSM communication system
KR101759456B1 (en) 2003-12-01 2017-07-18 인터디지탈 테크날러지 코포레이션 Session initiation protocol(sip) based user initiated handoff
KR100896684B1 (en) 2004-01-27 2009-05-14 삼성전자주식회사 Digital broadcasting transmission/reception capable of improving receiving performance and signal processing method thereof
KR100692596B1 (en) * 2004-05-06 2007-03-13 삼성전자주식회사 Digital broadcasting transmission/reception capable of improving receiving performance and signal processing method thereof
WO2006104408A1 (en) * 2005-03-31 2006-10-05 Intel Corporation System and method for compensation of non-linear transmitter distortion
US7831892B2 (en) * 2007-01-20 2010-11-09 Harris Corporation Generic, reduced state, maximum likelihood decoder
US7831893B2 (en) * 2007-01-20 2010-11-09 Harris Corporation Reduced state trellis decoder using programmable trellis parameters
US20080238762A1 (en) * 2007-01-31 2008-10-02 Donald Spyro Gumas System and methods for multistep target detection and parameter estimation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031195A (en) * 1989-06-05 1991-07-09 International Business Machines Corporation Fully adaptive modem receiver using whitening matched filtering
EP0488456A2 (en) * 1990-11-30 1992-06-03 Philips Patentverwaltung GmbH Maximum likelihood receiver
US5313495A (en) * 1992-05-12 1994-05-17 Hughes Aircraft Company Demodulator for symbols transmitted over a cellular channel
US5513215A (en) * 1993-09-20 1996-04-30 Glenayre Electronics, Inc. High speed simulcast data system using adaptive compensation
US5533063A (en) * 1994-01-31 1996-07-02 The Regents Of The University Of California Method and apparatus for multipath channel shaping

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03205926A (en) * 1988-12-12 1991-09-09 Nippon Telegr & Teleph Corp <Ntt> Equalizer
US5263026A (en) * 1991-06-27 1993-11-16 Hughes Aircraft Company Maximum likelihood sequence estimation based equalization within a mobile digital cellular receiver
FR2696301B1 (en) * 1992-09-25 1994-11-04 Alcatel Radiotelephone Filtering device for sequence estimation equalizer.
FR2696297B1 (en) * 1992-09-25 1994-11-04 Alcatel Radiotelephone Method for determining the transmittance of a filtering circuit provided for transforming the impulse response of a filter into a minimum phase response and filter using this method.
JP3560991B2 (en) * 1993-09-20 2004-09-02 株式会社東芝 Adaptive maximum likelihood sequence estimator
JPH0837479A (en) * 1994-07-22 1996-02-06 Fujitsu Ltd Sequential digital adaptive equalizer
US5867538A (en) * 1995-08-15 1999-02-02 Hughes Electronics Corporation Computational simplified detection of digitally modulated radio signals providing a detection of probability for each symbol
US5887035A (en) * 1997-10-31 1999-03-23 Ericsson, Inc. Method for joint equalization and detection of multiple user signals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031195A (en) * 1989-06-05 1991-07-09 International Business Machines Corporation Fully adaptive modem receiver using whitening matched filtering
EP0488456A2 (en) * 1990-11-30 1992-06-03 Philips Patentverwaltung GmbH Maximum likelihood receiver
US5313495A (en) * 1992-05-12 1994-05-17 Hughes Aircraft Company Demodulator for symbols transmitted over a cellular channel
US5513215A (en) * 1993-09-20 1996-04-30 Glenayre Electronics, Inc. High speed simulcast data system using adaptive compensation
US5533063A (en) * 1994-01-31 1996-07-02 The Regents Of The University Of California Method and apparatus for multipath channel shaping

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON COMMUNICATIONS, Volume 37, No. 5, May 1989, ALAXANDRA DUEL-HALLEN, CHRIS HEEGARD, "Delayed Decision-Feedback Sequence Estimation", page 429. *

Also Published As

Publication number Publication date
EP0843924B1 (en) 2004-06-30
DE69729709T2 (en) 2005-07-07
US6044111A (en) 2000-03-28
WO1997039550A2 (en) 1997-10-23
DE19614544C1 (en) 1997-08-28
DE69729709D1 (en) 2004-08-05
EP0843924A2 (en) 1998-05-27
JP4555403B2 (en) 2010-09-29
JPH11508114A (en) 1999-07-13

Similar Documents

Publication Publication Date Title
WO1997039550A3 (en) Equalizer with a sequence estimation method with state reduction for a receiver in a digital transmission system
US6021161A (en) Adaptive equalizer for controlling a step size in proportion to an estimated delay of received signals
JP3044899B2 (en) Apparatus for coherent demodulation of digital data multiplexed in the time-frequency domain with evaluation and limit decision of the frequency response of the channel
US5185764A (en) Receiver for time-varying distorted signals
EP0998785B1 (en) Adaptively equalized burst receiver and method for upstream broadband data
CA2343153A1 (en) Receiver and an adaptive equalizer method
WO2002015502A3 (en) Adaptive linear equalisation for walsh-modulated
IE80438B1 (en) Soft decision decoding with channel equalization
CA2019659A1 (en) Receiver for data transmission system with nonlinearities
EP1190542A1 (en) Power efficient equalization
CN102017555B (en) Receiving device and channel estimation method
AU722245B2 (en) Method for estimating impulse response, and receiver
US5299235A (en) Time synchronization of a receiver in a digital radio telephone system
JPH0556693B2 (en)
AU727493C (en) Method for calculating impulse response, and receiver
CA2039373A1 (en) Digital data communication system with adaptive channel response estimation
US5267264A (en) Synchronization and matching method for a binary baseband transmission system
EP0739117A4 (en) Digital radio communication equipment
EP0304081A2 (en) Digital communication system using partial response and bipolar coding techniques
CA2074277A1 (en) Adaptative equalization method reducing intersymbol interference and related receiver device and application
US6804293B1 (en) Method for equalising a receive signal
JP3844951B2 (en) Receiver and adaptive equalization processing method
KR20050040615A (en) Apparatus for estimating channel using training sequence data for digital receiver and method thereof
AU775780B2 (en) Estimating interference in a communication system
AU5154900A (en) Method for symbol-spaced estimation and/or tracking of a fractionally-spaced fading radio channel

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

AK Designated states

Kind code of ref document: A3

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 1997908460

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 08973023

Country of ref document: US

ENP Entry into the national phase

Ref country code: JP

Ref document number: 1997 536902

Kind code of ref document: A

Format of ref document f/p: F

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1997908460

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1997908460

Country of ref document: EP