CA2110244A1 - Extended List Output and Soft Symbol Output Viterbi Algorithms - Google Patents

Extended List Output and Soft Symbol Output Viterbi Algorithms

Info

Publication number
CA2110244A1
CA2110244A1 CA2110244A CA2110244A CA2110244A1 CA 2110244 A1 CA2110244 A1 CA 2110244A1 CA 2110244 A CA2110244 A CA 2110244A CA 2110244 A CA2110244 A CA 2110244A CA 2110244 A1 CA2110244 A1 CA 2110244A1
Authority
CA
Canada
Prior art keywords
output
gva
sova
soft symbol
extended list
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
CA2110244A
Other languages
French (fr)
Other versions
CA2110244C (en
Inventor
Christiane Gabriele Nill
Carl-Erik Wilhelm Sundberg
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2110244A1 publication Critical patent/CA2110244A1/en
Application granted granted Critical
Publication of CA2110244C publication Critical patent/CA2110244C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H03M13/4138—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors soft-output Viterbi algorithm based decoding, i.e. Viterbi decoding with weighted decisions
    • H03M13/4146—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors soft-output Viterbi algorithm based decoding, i.e. Viterbi decoding with weighted decisions soft-output Viterbi decoding according to Battail and Hagenauer in which the soft-output is determined using path metric differences along the maximum-likelihood path, i.e. "SOVA" decoding
    • 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
    • H03M13/4115—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors list output Viterbi decoding

Abstract

A family of extended Generalized Viterbi Algorithm (GVA) and Soft Output Viterbi Algorithm (SOVA) decoders is disclosed. In one embodiment structural aspects of a SOVA are used to develop a new implementation for a serial GVA. Another aspect of the invention provides a low complexity SOVA that generates a reliability measure for decoded information using a list output of the GVA. In a further aspect, reliability information from a SOVA is used to develop a low complexity GVA.
CA002110244A 1993-01-14 1993-11-29 Extended list output and soft symbol output viterbi algorithms Expired - Fee Related CA2110244C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US004,360 1993-01-14
US08/004,360 US5537444A (en) 1993-01-14 1993-01-14 Extended list output and soft symbol output viterbi algorithms

Publications (2)

Publication Number Publication Date
CA2110244A1 true CA2110244A1 (en) 1994-07-15
CA2110244C CA2110244C (en) 1998-09-22

Family

ID=21710403

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002110244A Expired - Fee Related CA2110244C (en) 1993-01-14 1993-11-29 Extended list output and soft symbol output viterbi algorithms

Country Status (7)

Country Link
US (1) US5537444A (en)
EP (1) EP0606724A1 (en)
JP (1) JPH0795099A (en)
KR (1) KR940019106A (en)
CA (1) CA2110244C (en)
FI (1) FI940175A (en)
NO (1) NO940081L (en)

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Also Published As

Publication number Publication date
CA2110244C (en) 1998-09-22
KR940019106A (en) 1994-08-19
US5537444A (en) 1996-07-16
NO940081L (en) 1994-07-15
NO940081D0 (en) 1994-01-10
JPH0795099A (en) 1995-04-07
FI940175A0 (en) 1994-01-13
EP0606724A1 (en) 1994-07-20
FI940175A (en) 1994-07-15

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