Soft-bit de-mapping device and method of generating soft...

Details Soft-bit de-mapping device and method of generating soft... Soft-bit de-mapping device and method of generating soft...

2008-05-24

2011-11-01

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S341000, C375S316000, C375S260000, C375S231000, C375S262000, C375S265000

Reexamination Certificate

active

08050362

ABSTRACT:
A soft-bit de-mapping device and method of generating soft bits for decoding quantizes a log-likelihood ratio (LLR) value for a received value using functions bits and channel parameter bits to generate the soft bits. The function bits are generated by quantizing an LLR function for the received value, which includes modifying an original curve of the LLR function to a modified curve such that a segment of the original curve with the lowest slope is protected in the modified curve for a fixed equal quantization step-size. The channel parameter bits are generated by quantizing a channel parameter for the received value to generate channel.

REFERENCES:
patent: 6473449 (2002-10-01), Cafarella et al.
patent: 2003/0231714 (2003-12-01), Kjeldsen et al.
patent: 2007/0071140 (2007-03-01), Sontowski
patent: 2007/0086541 (2007-04-01), Moon et al.
patent: 2007/0260959 (2007-11-01), Sidi et al.
patent: 2007/0297538 (2007-12-01), Kim

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