SE464902B - Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet - Google Patents

Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet

Info

Publication number
SE464902B
SE464902B SE8903526A SE8903526A SE464902B SE 464902 B SE464902 B SE 464902B SE 8903526 A SE8903526 A SE 8903526A SE 8903526 A SE8903526 A SE 8903526A SE 464902 B SE464902 B SE 464902B
Authority
SE
Sweden
Prior art keywords
transition
channel
state
impulse response
algorithm
Prior art date
Application number
SE8903526A
Other languages
English (en)
Swedish (sv)
Other versions
SE8903526L (sv
SE8903526D0 (sv
Inventor
B P O Gudmundson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE8903526A priority Critical patent/SE464902B/sv
Publication of SE8903526D0 publication Critical patent/SE8903526D0/xx
Priority to JP2514469A priority patent/JPH04502695A/ja
Priority to PCT/SE1990/000575 priority patent/WO1991007035A1/fr
Priority to KR1019910700644A priority patent/KR970007615B1/ko
Priority to AT90850301T priority patent/ATE107102T1/de
Priority to FI912862A priority patent/FI912862A7/fi
Priority to ES90850301T priority patent/ES2054326T3/es
Priority to AU65492/90A priority patent/AU626471B2/en
Priority to CA002044261A priority patent/CA2044261C/fr
Priority to EP90850301A priority patent/EP0425458B1/fr
Priority to DK90850301.4T priority patent/DK0425458T3/da
Priority to DE69009674T priority patent/DE69009674T2/de
Priority to NZ235350A priority patent/NZ235350A/en
Priority to US07/599,896 priority patent/US5164961A/en
Publication of SE8903526L publication Critical patent/SE8903526L/
Priority to IE352290A priority patent/IE65267B1/en
Priority to NO912432A priority patent/NO302730B1/no
Publication of SE464902B publication Critical patent/SE464902B/sv
Priority to HK123194A priority patent/HK123194A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0236—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols using estimation of the other symbols
    • 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
    • H04L25/03292—Arrangements for operating in conjunction with other apparatus with channel estimation circuitry

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Error Detection And Correction (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
  • Dc Digital Transmission (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Saccharide Compounds (AREA)
SE8903526A 1989-10-24 1989-10-24 Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet SE464902B (sv)

Priority Applications (17)

Application Number Priority Date Filing Date Title
SE8903526A SE464902B (sv) 1989-10-24 1989-10-24 Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet
DE69009674T DE69009674T2 (de) 1989-10-24 1990-09-10 Methode zur Adaption eines Viterbi-Algorithmus in einen Kanal mit variierenden Transmissionseigenschaften und Apparat zur Realisierung der Methode.
CA002044261A CA2044261C (fr) 1989-10-24 1990-09-10 Methode et appareil d'adaptation d'un algorithme de viterbi a un canal a caracteristiques de transmission variables
DK90850301.4T DK0425458T3 (da) 1989-10-24 1990-09-10 Fremgangsmåde til tilpasning af en viterbialgoritme til en kanal med varierende transmissionsegenskaber og apparatur til udøvelse af fremgangsmåden
KR1019910700644A KR970007615B1 (ko) 1989-10-24 1990-09-10 변동하는 전송특성을 가진 채널 비터비 · 알고리즘을 적용하는 방법 및 그 방법을 실행하는 장치
AT90850301T ATE107102T1 (de) 1989-10-24 1990-09-10 Methode zur adaption eines viterbi-algorithmus in einen kanal mit variierenden transmissionseigenschaften und apparat zur realisierung der methode.
FI912862A FI912862A7 (fi) 1989-10-24 1990-09-10 Menetelmä viterbialgoritmin sovittamiseksi vaihtelevat siirto-ominaisu udet omaavaan kanavaan sekä laite menetelmän toteuttamiseksi
ES90850301T ES2054326T3 (es) 1989-10-24 1990-09-10 Un metodo para adaptar un algoritmo de viterbi a un canal que tiene propiedades de transmision variables, y aparato para llevar a cabo el metodo.
AU65492/90A AU626471B2 (en) 1989-10-24 1990-09-10 A method of adapting a viterbi algorithm to a channel having varying transmission properties, and apparatus for carrying out the method
JP2514469A JPH04502695A (ja) 1989-10-24 1990-09-10 変動する伝送特性を有するチャネルにビタビ・アルゴリズムを適用する方法及びその方法を実行する装置
EP90850301A EP0425458B1 (fr) 1989-10-24 1990-09-10 Méthode d'adaption d'un algorithm "Viterbi" dans un canal, ayant des propriétés de transmission variables et appareil pour mise en oeuvre de cette méthode
PCT/SE1990/000575 WO1991007035A1 (fr) 1989-10-24 1990-09-10 Procede d'adaptation d'un algorithme viterbi a un canal ayant des proprietes de transmission variables et appareil de realisation de ce procede
NZ235350A NZ235350A (en) 1989-10-24 1990-09-17 Adaptive viterbi analyser
US07/599,896 US5164961A (en) 1989-10-24 1990-10-19 Method and apparatus for adapting a viterbi algorithm to a channel having varying transmission properties
IE352290A IE65267B1 (en) 1989-10-24 1991-06-18 A method of adapting a viterbi algorithm to a channel having varying transmission properties and apparatus for carrying out the method
NO912432A NO302730B1 (no) 1989-10-24 1991-06-21 Fremgangsmåte for å adaptere en viterbialgoritme til en kanal med skiftende overföringsegenskaper samt en anordning for gjennomföring av fremgangsmåten
HK123194A HK123194A (en) 1989-10-24 1994-11-10 A method of adapting a viterbi algorithm to a channel having varying transmission properties, and apparatus for carrying out the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8903526A SE464902B (sv) 1989-10-24 1989-10-24 Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet

Publications (3)

Publication Number Publication Date
SE8903526D0 SE8903526D0 (sv) 1989-10-24
SE8903526L SE8903526L (sv) 1991-04-25
SE464902B true SE464902B (sv) 1991-06-24

Family

ID=20377260

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8903526A SE464902B (sv) 1989-10-24 1989-10-24 Foerfarande att adaptera en viterbialgoritm till en kanal med skiftande oeverfoeringsegenskaper samt en anordning foer genomfoerande av foerfarandet

Country Status (17)

Country Link
US (1) US5164961A (fr)
EP (1) EP0425458B1 (fr)
JP (1) JPH04502695A (fr)
KR (1) KR970007615B1 (fr)
AT (1) ATE107102T1 (fr)
AU (1) AU626471B2 (fr)
CA (1) CA2044261C (fr)
DE (1) DE69009674T2 (fr)
DK (1) DK0425458T3 (fr)
ES (1) ES2054326T3 (fr)
FI (1) FI912862A7 (fr)
HK (1) HK123194A (fr)
IE (1) IE65267B1 (fr)
NO (1) NO302730B1 (fr)
NZ (1) NZ235350A (fr)
SE (1) SE464902B (fr)
WO (1) WO1991007035A1 (fr)

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US5465276A (en) * 1991-09-10 1995-11-07 Telefonaktiebolaget Lm Ericsson Method of forming a channel estimate for a time-varying radio channel

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GB9008613D0 (en) * 1990-04-17 1990-06-13 Marconi Gec Ltd Reducing interference in r.f.signals
JP2668455B2 (ja) * 1990-12-20 1997-10-27 富士通株式会社 ビタビ復調制御方式
JPH04358364A (ja) * 1991-06-05 1992-12-11 Sony Corp 最尤復号装置
US5303263A (en) * 1991-06-25 1994-04-12 Oki Electric Industry Co., Ltd. Transmission channel characteristic equalizer
US5862192A (en) * 1991-12-31 1999-01-19 Lucent Technologies Inc. Methods and apparatus for equalization and decoding of digital communications channels using antenna diversity
US5331666A (en) * 1992-06-08 1994-07-19 Ericsson Ge Mobile Communications Inc. Adaptive maximum likelihood demodulator
US5577068A (en) * 1992-06-08 1996-11-19 Ericsson Ge Mobile Communications Inc. Generalized direct update viterbi equalizer
EP0602249B1 (fr) * 1992-06-18 2002-08-28 Oki Electric Industry Company, Limited Dispositif et procede d'estimation de sequence probabiliste maximale
SE470371B (sv) * 1992-06-23 1994-01-31 Ericsson Telefon Ab L M Sätt och anordning vid digital signalöverföring att hos en mottagare estimera överförda symboler
US5335250A (en) * 1992-10-22 1994-08-02 Ericsson Ge Mobile Communications Inc. Method and apparatus for bidirectional demodulation of digitally modulated signals
US5867537A (en) * 1992-10-27 1999-02-02 Ericsson Inc. Balanced tranversal I,Q filters for quadrature modulators
US5727023A (en) * 1992-10-27 1998-03-10 Ericsson Inc. Apparatus for and method of speech digitizing
US5745523A (en) * 1992-10-27 1998-04-28 Ericsson Inc. Multi-mode signal processing
US5530722A (en) * 1992-10-27 1996-06-25 Ericsson Ge Mobile Communications Inc. Quadrature modulator with integrated distributed RC filters
US5363412A (en) * 1992-12-28 1994-11-08 Motorola, Inc. Method and apparatus of adaptive maximum likelihood sequence estimation using filtered correlation synchronization
US5424881A (en) 1993-02-01 1995-06-13 Cirrus Logic, Inc. Synchronous read channel
SE513657C2 (sv) * 1993-06-24 2000-10-16 Ericsson Telefon Ab L M Sätt och anordning att vid digital signalöverföring estimera överförda symboler hos en mottagare
US5488635A (en) * 1993-10-29 1996-01-30 General Electric Company Low complexity adaptive equalizer radio receiver employing reduced complexity branch metric calculation
JP2669350B2 (ja) * 1994-07-07 1997-10-27 日本電気株式会社 状態数可変最尤系列推定器
US5680419A (en) * 1994-08-02 1997-10-21 Ericsson Inc. Method of and apparatus for interference rejection combining in multi-antenna digital cellular communications systems
US5481572A (en) * 1994-08-02 1996-01-02 Ericsson Inc. Method of and apparatus for reducing the complexitiy of a diversity combining and sequence estimation receiver
US6081566A (en) * 1994-08-02 2000-06-27 Ericsson, Inc. Method and apparatus for interference rejection with different beams, polarizations, and phase references
US6173014B1 (en) 1994-08-02 2001-01-09 Telefonaktiebolaget Lm Ericsson Method of and apparatus for interference rejection combining and downlink beamforming in a cellular radio communications system
FI110731B (fi) * 1994-09-12 2003-03-14 Nokia Corp Menetelmä kanavan estimoimiseksi ja vastaanotin
FI105514B (fi) * 1994-09-12 2000-08-31 Nokia Mobile Phones Ltd Vastaanottomenetelmä ja vastaanotin
US5557645A (en) * 1994-09-14 1996-09-17 Ericsson-Ge Mobile Communications Inc. Channel-independent equalizer device
SE9403109D0 (sv) * 1994-09-16 1994-09-16 Limt Technology Ab Local insertion of digital material in analogue and digital broadcasting
SE503522C2 (sv) * 1994-10-31 1996-07-01 Ericsson Telefon Ab L M Förfarande och anordning för kanalestimering
US5586128A (en) * 1994-11-17 1996-12-17 Ericsson Ge Mobile Communications Inc. System for decoding digital data using a variable decision depth
CA2147087A1 (fr) * 1995-04-13 1996-10-14 Guy Begin Methode et appareil de correction de suites de branchement representant des bits utiles codes et de transformation de ces bits en bits utiles approximatifs
JP3674111B2 (ja) * 1995-10-25 2005-07-20 三菱電機株式会社 データ伝送装置
US5742621A (en) * 1995-11-02 1998-04-21 Motorola Inc. Method for implementing an add-compare-select butterfly operation in a data processing system and instruction therefor
US5764646A (en) * 1996-04-02 1998-06-09 Ericsson Inc. Packet data transmission with clash subtraction
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US5881073A (en) * 1996-09-20 1999-03-09 Ericsson Inc. Convolutional decoding with the ending state decided by CRC bits placed inside multiple coding bursts
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Also Published As

Publication number Publication date
NO912432L (no) 1991-06-21
NO912432D0 (no) 1991-06-21
IE903522A1 (en) 1991-04-24
NO302730B1 (no) 1998-04-14
FI912862A0 (fi) 1991-06-13
IE65267B1 (en) 1995-10-18
JPH04502695A (ja) 1992-05-14
SE8903526L (sv) 1991-04-25
AU626471B2 (en) 1992-07-30
SE8903526D0 (sv) 1989-10-24
US5164961A (en) 1992-11-17
EP0425458B1 (fr) 1994-06-08
ATE107102T1 (de) 1994-06-15
HK123194A (en) 1994-11-18
CA2044261A1 (fr) 1991-04-25
DE69009674T2 (de) 1994-09-22
DK0425458T3 (da) 1994-10-03
DE69009674D1 (de) 1994-07-14
ES2054326T3 (es) 1994-08-01
KR920702125A (ko) 1992-08-12
CA2044261C (fr) 1999-04-27
EP0425458A1 (fr) 1991-05-02
NZ235350A (en) 1993-04-28
AU6549290A (en) 1991-05-31
FI912862A7 (fi) 1991-06-13
WO1991007035A1 (fr) 1991-05-16
KR970007615B1 (ko) 1997-05-13

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