Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2006-06-07
2009-08-18
Baker, Stephen M (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
Reexamination Certificate
active
07577893
ABSTRACT:
The present invention relates to an improved decoding scheme for use in a concatenated channel decoder. In the present invention, the decoding of the concatenated code is done iteratively to increase the confidence for any corrected symbols. As a result, the overall performance of the decoder is improved. This iterative process comprises using a Maximal a posteriori (MAP) decoder which generates decoded information, to include Erasure Information. The output of the MAP decoder is then supplied to a Reed Solomon (RS) decoder, which attains better error correction performance by using this Erasure Information. This improved output of the RS decoder is then supplied back to the MAP decoder, thereby improving the performance of the system.
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Aitsab et al, “Performance of Concatenated Reed-Solomon/Convolutional Codes with Iterative Decoding”, Globecom '97, Sep. 1997, pp. 934-938.
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Malkemes Robert Conrad
Song Jie
Agere Systems Inc.
Baker Stephen M
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