SE465597B - Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner - Google Patents

Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner

Info

Publication number
SE465597B
SE465597B SE9000566A SE9000566A SE465597B SE 465597 B SE465597 B SE 465597B SE 9000566 A SE9000566 A SE 9000566A SE 9000566 A SE9000566 A SE 9000566A SE 465597 B SE465597 B SE 465597B
Authority
SE
Sweden
Prior art keywords
signals
values
state
viterbi
antennas
Prior art date
Application number
SE9000566A
Other languages
English (en)
Swedish (sv)
Other versions
SE9000566L (sv
SE9000566D0 (sv
Inventor
O T Baeckstroem
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
Publication of SE9000566D0 publication Critical patent/SE9000566D0/xx
Priority to SE9000566A priority Critical patent/SE465597B/sv
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to NZ236924A priority patent/NZ236924A/xx
Priority to ES91850015T priority patent/ES2064981T3/es
Priority to EP91850015A priority patent/EP0443997B1/en
Priority to DK91850015.8T priority patent/DK0443997T3/da
Priority to AT91850015T priority patent/ATE114906T1/de
Priority to DE69105298T priority patent/DE69105298T2/de
Priority to KR1019910001970A priority patent/KR960013962B1/ko
Priority to US07/652,419 priority patent/US5191598A/en
Priority to MYPI91000204A priority patent/MY104741A/en
Priority to CA002036423A priority patent/CA2036423C/en
Priority to JP03022282A priority patent/JP3113293B2/ja
Priority to AU71074/91A priority patent/AU634629B2/en
Priority to CN91101088A priority patent/CN1025400C/zh
Publication of SE9000566L publication Critical patent/SE9000566L/
Publication of SE465597B publication Critical patent/SE465597B/sv
Priority to HK34495A priority patent/HK34495A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • 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
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/23—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using convolutional codes, e.g. unit memory codes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04L25/03184—Details concerning the metric
    • 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
    • H04L25/03331—Arrangements for the joint estimation of multiple sequences
    • 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
    • H04L25/0204—Channel estimation of multiple channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Probability & Statistics with Applications (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Error Detection And Correction (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Details Of Aerials (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
SE9000566A 1990-02-16 1990-02-16 Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner SE465597B (sv)

Priority Applications (15)

Application Number Priority Date Filing Date Title
SE9000566A SE465597B (sv) 1990-02-16 1990-02-16 Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner
NZ236924A NZ236924A (en) 1990-02-16 1991-01-28 Viterbi receiver: estimating transmission function for each antenna signal
ES91850015T ES2064981T3 (es) 1990-02-16 1991-01-29 Un metodo de reducir la influencia del desvanecimiento de la se¦al en un receptor viterbi que tiene al menos dos antenas.
EP91850015A EP0443997B1 (en) 1990-02-16 1991-01-29 A method of reducing the influence of fading of a Viterbi-receiver having at least two antennas
DK91850015.8T DK0443997T3 (da) 1990-02-16 1991-01-29 Fremgangsmåde til reduktion af virkningen af fading i en viterbi-modtager med i det mindste to antenner
AT91850015T ATE114906T1 (de) 1990-02-16 1991-01-29 Verfahren zur fadingverminderung eines viterbi- empfängers mit zumindestens zwei antennen.
DE69105298T DE69105298T2 (de) 1990-02-16 1991-01-29 Verfahren zur Fadingverminderung eines Viterbi-Empfängers mit zumindestens zwei Antennen.
KR1019910001970A KR960013962B1 (ko) 1990-02-16 1991-02-05 두개 이상의 안테나를 갖는 비터비 수신기의 페이딩의 영향을 감소시키는 방법
US07/652,419 US5191598A (en) 1990-02-16 1991-02-07 System for reducing the affects of signal fading on received signals
MYPI91000204A MY104741A (en) 1990-02-16 1991-02-09 A method of reducing the influence of fading of a viterbi receiver having at least two antennas
CA002036423A CA2036423C (en) 1990-02-16 1991-02-15 Method of reducing the influence of fading of a viterbi receiver having at least two antennas
JP03022282A JP3113293B2 (ja) 1990-02-16 1991-02-15 少なくとも２個のアンテナを有するビタビ受信機のフェージングの影響を減少させる方法
AU71074/91A AU634629B2 (en) 1990-02-16 1991-02-15 A method of reducing the influence of fading of a viterbi- receiver having at least two antennas
CN91101088A CN1025400C (zh) 1990-02-16 1991-02-18 具有至少两个天线的维特毕收信机衰减影响的减小方法
HK34495A HK34495A (en) 1990-02-16 1995-03-09 A method of reducing the influence of fading of a viterbi-receiver having at least two antennas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9000566A SE465597B (sv) 1990-02-16 1990-02-16 Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner

Publications (3)

Publication Number Publication Date
SE9000566D0 SE9000566D0 (sv) 1990-02-16
SE9000566L SE9000566L (sv) 1991-08-17
SE465597B true SE465597B (sv) 1991-09-30

Family

ID=20378589

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9000566A SE465597B (sv) 1990-02-16 1990-02-16 Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner

Country Status (15)

Country Link
US (1) US5191598A (zh)
EP (1) EP0443997B1 (zh)
JP (1) JP3113293B2 (zh)
KR (1) KR960013962B1 (zh)
CN (1) CN1025400C (zh)
AT (1) ATE114906T1 (zh)
AU (1) AU634629B2 (zh)
CA (1) CA2036423C (zh)
DE (1) DE69105298T2 (zh)
DK (1) DK0443997T3 (zh)
ES (1) ES2064981T3 (zh)
HK (1) HK34495A (zh)
MY (1) MY104741A (zh)
NZ (1) NZ236924A (zh)
SE (1) SE465597B (zh)

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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
CA2083304C (en) * 1991-12-31 1999-01-26 Stephen R. Huszar Equalization and decoding for digital communication channel
US5319677A (en) * 1992-05-12 1994-06-07 Hughes Aircraft Company Diversity combiner with MLSE for digital cellular radio
US5621769A (en) * 1992-06-08 1997-04-15 Novatel Communications Ltd. Adaptive-sequence-estimation apparatus employing diversity combining/selection
US5577068A (en) * 1992-06-08 1996-11-19 Ericsson Ge Mobile Communications Inc. Generalized direct update viterbi equalizer
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
DE4224214C2 (de) * 1992-07-22 1995-02-09 Deutsche Forsch Luft Raumfahrt Verfahren zur quellengesteuerten Kanaldecodierung durch Erweiterung des Viterbi-Algorithmus
US5432821A (en) * 1992-12-02 1995-07-11 University Of Southern California System and method for estimating data sequences in digital transmissions
US5289499A (en) * 1992-12-29 1994-02-22 At&T Bell Laboratories Diversity for direct-sequence spread spectrum systems
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US6201801B1 (en) 1994-03-24 2001-03-13 Ericsson Inc. Polarization diversity phased array cellular base station and associated methods
US6151310A (en) * 1994-03-24 2000-11-21 Ericsson Inc. Dividable transmit antenna array for a cellular base station and associated method
US5832389A (en) * 1994-03-24 1998-11-03 Ericsson Inc. Wideband digitization systems and methods for cellular radiotelephones
US5499272A (en) * 1994-05-31 1996-03-12 Ericsson Ge Mobile Communications Inc. Diversity receiver for signals with multipath time dispersion
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
US6081566A (en) * 1994-08-02 2000-06-27 Ericsson, Inc. Method and apparatus for interference rejection with different beams, polarizations, and phase references
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
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
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US5586128A (en) * 1994-11-17 1996-12-17 Ericsson Ge Mobile Communications Inc. System for decoding digital data using a variable decision depth
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Also Published As

Publication number Publication date
AU7107491A (en) 1991-08-22
HK34495A (en) 1995-03-17
DE69105298D1 (de) 1995-01-12
KR910016163A (ko) 1991-09-30
CA2036423A1 (en) 1991-08-17
DE69105298T2 (de) 1995-04-13
JPH04215334A (ja) 1992-08-06
KR960013962B1 (ko) 1996-10-10
SE9000566L (sv) 1991-08-17
US5191598A (en) 1993-03-02
CN1054156A (zh) 1991-08-28
AU634629B2 (en) 1993-02-25
JP3113293B2 (ja) 2000-11-27
DK0443997T3 (da) 1995-05-08
EP0443997A1 (en) 1991-08-28
ES2064981T3 (es) 1995-02-01
MY104741A (en) 1994-05-31
CN1025400C (zh) 1994-07-06
NZ236924A (en) 1993-03-26
EP0443997B1 (en) 1994-11-30
SE9000566D0 (sv) 1990-02-16
ATE114906T1 (de) 1994-12-15
CA2036423C (en) 1996-12-17

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