TTCM decoder design

Details TTCM decoder design TTCM decoder design

2006-09-12

2006-09-12

Torres, Joseph (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S795000

Reexamination Certificate

active

07107512

ABSTRACT:
TTCM (Turbo Trellis Coded Modulation) decoder design. The design also adapts to any number of devices that perform decoding of Trellis Code Modulation (TCM) signals. After performing initial symbol processing within a data block to generate a number of check point values, the design selectively re-calculates some forward metrics (alphas) and backward metrics (betas), and the design is able to calculate extrinsic (ext) information for each symbol within the data block successively. The data block is subdivided into a number of sub-blocks that are intelligently processed to enable extremely fast processing. Generally speaking, the design performs initial processing starting from both block ends, and upon approaching the block middle, the design begins to process the block using skip backs to previous sub-blocks. The design employs a great deal of parallel and simultaneously processing to provide for very fast computation of the various values required to decode the block.

REFERENCES:
patent: 5406570 (1995-04-01), Berrou et al.
patent: 5446747 (1995-08-01), Berrou
patent: 5563897 (1996-10-01), Pyndiah et al.
patent: 6028899 (2000-02-01), Petersen
patent: 6065147 (2000-05-01), Pyndiah et al.
patent: 6119264 (2000-09-01), Berrou et al.
patent: 6122763 (2000-09-01), Pyndiah et al.
patent: 6343368 (2002-01-01), Lerzer
patent: 6484283 (2002-11-01), Stephen et al.
patent: 6530059 (2003-03-01), Crozier et al.
patent: 6598204 (2003-07-01), Giese et al.
patent: 6857101 (2005-02-01), Levy
patent: 2002/0021770 (2002-02-01), Beerel et al.
patent: 0 735 696 (1996-10-01), None
patent: 0 735 696 (1999-01-01), None
patent: 1 156 588 (1999-01-01), None
patent: 91 05278 (1992-10-01), None
patent: WO 02 23739 (2002-03-01), None
Raouafi et al: “Saving memory in turbo-decoders using the Max-Log-MAP algorithm” IEE Colloquium, Turbo Codes in Digital Broadcasting-Could it be Double Capacity, XX, XX, Nov. 22, 1999, pp. 14/1-14/4, XP002185687 pp. 14-2; figure 2.
Schurgers C et al: “Optimized map turbo decoder” Proc. of IEEE Workshop on Signal Processing Systems SIPS 2000, Oct. 11, 2000, pp. 245-254, XP010525234 p. 248-249; figures 3, 4.
Akella R et al: “On the parallel map algorithm” Proc. of IEEE Workshop on Multimedia Signal Processing, Oct. 3, 2001, pp. 371-376, XP010565802 Cannes, France, the whole document.

Affiliated with

No affiliations

Also associated with

Rating

TTCM decoder design does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with TTCM decoder design, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TTCM decoder design will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3609149