Turbo decoder

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train

Reexamination Certificate

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Details

C375S341000, C375S262000, 74, 74, 74, 74, 74

Reexamination Certificate

active

11087372

ABSTRACT:
A turbo decoder is disclosed that receives a demodulated input signal before a hard decision, including blocks each of multiple data units, and outputs a decoded signal block by block. The turbo decoder includes a decoding part outputting a decoded output signal and extrinsic likelihood information based on the input signal and preliminary likelihood information, the extrinsic likelihood information being used as the preliminary likelihood information in creating the next output signal; a specification part specifying a data unit of the block with respect to which no error is detected in error checking performed on each data unit of the hard decision output signal; and a replacement part inputting a signal sequence, created by replacing signal data before the hard decision with those after the hard decision with respect to the data unit specified by the specification part, to the decoding part as the input signal.

REFERENCES:
patent: 2001/0025358 (2001-09-01), Eidson et al.
patent: 2002/0166095 (2002-11-01), Lavi et al.
patent: 2003/0028838 (2003-02-01), Chang et al.
patent: 2003/0106012 (2003-06-01), Hewitt
patent: 2000-201085 (2000-07-01), None
patent: 2001-230677 (2001-08-01), None
patent: 2001-358699 (2001-12-01), None
Supplementary European Search Report dated Mar. 27, 2007.
Lei Cao, et al. “Novel Product Coding and Decoding Scheme for Wireless Image Transmission” Proc. 2000 International Conference on Image Processing ICIP 2000, vol. 2 of 3, conf. 7, Sep. 10, 2000, pp. 144-147, XP002285555.
Jifeng Li, et al. “Turbo Coding for W-CDMA System” Proceedings of the European Wireless, No. 157, Oct. 6, 1999, pp. 397-401, XP008004612.
International Search Report dated Jul. 1, 2003.
A. Shibutani, et al. Reducing Average Number of Turbo Decoding Iterations. Electronics Letters, Apr. 1999, vol. 35, No. 9, pp. 701-702.

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