Decoding method and device and systems implementing them

Details Decoding method and device and systems implementing them Decoding method and device and systems implementing them

2005-06-21

2005-06-21

Young, W. R. (Department: 2655)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S201000, C714S780000, C714S794000

Reexamination Certificate

active

06910006

ABSTRACT:
In order to decode a sequence α=(α1, . . . , αi, . . . , αn) where αiis the received electrical signal corresponding to a transmitted signal airepresenting the ithbinary element viof a word v=(v1, . . . , vn) chosen in a code C of words satisfying v·hT=0, where h is a row n-tuplet on the set {0,1 }, whose number of 1 is denoted w, an item of extrinsic information ρext[A(i,h)]=P[ai=−1|A(i,h)]/P[ai=+1|A(i,h)] is determined on each of the elements vicovered by h, A(i,h) being the set of the received values αjcovered by h, with the exception of αi, and P[ai|A(i,h)] being the probability that the ithsignal transmitted was ai. This gives ρext[A(i,h)]=[S1(i)+S3(i)+ . . . ]/[1+S2(i)+S4(i)+ . . . ] where the numbers Sr(i) are calculated by applying the recurrencer-1⁢∑i=1w⁢zαi⁢Sr-1⁢(i)-zαj⁢Sr-1⁢(j)=Sr⁢(j)to the numbers S0(i) initialised to 1, with z=exp(−4 E/N), where E is the energy of the transmitted signals aiand N is the spectral power density of the noise on the transmission channel.

REFERENCES:
patent: 6484283 (2002-11-01), Stephen et al.
patent: 6499128 (2002-12-01), Gerlach et al.
patent: 6510536 (2003-01-01), Crozier et al.
patent: 6578170 (2003-06-01), Piret et al.
patent: 6594792 (2003-07-01), Hladik et al.
patent: 6606725 (2003-08-01), Wang et al.
patent: 2003/0101407 (2003-05-01), Ariel et al.
patent: WO-000169789 (2001-09-01), None
Ghrayeb, Ali; Ryan, W., “Performance of High Rate Turbo Codes Employing the Soft-Output Viterbi Algorithm”, Signals, Systems, and Computers, Oct. 1999. vol.: 2, 24-27.
Papke, L.; Robertson, P.; Villebrun, E., “Improved Decoding with the SOVA in a Parallel Concatenated (Turbo-code) Scheme” Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on , vol.: 1 , 23-27, Jun. 1996.
R.E. Blahut, “Theory and Practice of Error Control Codes,” ADDISON-WESLEY, U.S. pp. 176-191 (May 1984), XP002163579.
C. Barel, “Etude d'un code correctuer d'errors pour un système de télémesure,” (public presentation and corresponding paper), Bruz, pp. 40-48 (Jun. 1994), XP002163578.
R.M. Pyndiah, “Near-Optimum Decoding of Product Codes: Block Turbo Codes,” IEEE Translations On Communications, IEEE Inc., New York, U.S., vol. 46, No. 8, pp. 1003-1010 (Aug. 1, 1998), XP000782280, ISBN: 0090-6778.

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