Soft demodulation method and apparatus

Details Soft demodulation method and apparatus Soft demodulation method and apparatus

2008-05-06

2008-05-06

Ha, Dac V. (Department: 2611)

Pulse or digital communications

Pulse code modulation

Differential

C375S253000, C375S262000, C375S341000, C714S774000, C714S794000

Reexamination Certificate

active

10763381

ABSTRACT:
A soft demodulation method and apparatus including calculating partial sums for a unit of each predetermined number of bits of a codeword received from a channel; calculating a value of each entry of the decoding table by referring to the partial sums; and detecting a maximum among values of all entries of the decoding table and calculating a log-likelihood ratio (LLR) using the detected maximum. Accordingly, it is possible to reduce the amount of computation required to perform a soft demodulation process using run-length limited (RLL) codes and to simplify the soft demodulation process.

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