Syndrome-based channel quality or message structure determiner

Details Syndrome-based channel quality or message structure determiner Syndrome-based channel quality or message structure determiner

1997-06-18

1999-08-10

Tu, Trinh L.

Excavating

371 51, 371 671, 370333, G01R 3128

Patent

active

059369728

ABSTRACT:
A syndrome-based channel quality or message structure determiner (160) uses syndrome vectors to estimate the quality of a received signal in a variable message structure communication system. A digital signal from analog-to-digital converter (150) is separated into multiple branching paths, one for each potential message structure type. In a single path, a digital demodulator (221) demodulates the digital signal to produce a demodulated received signal. A deinterleaver (222) deinterleaves the demodulated received signal, and a symbol-by-symbol detector (2231) hard-decision detects the deinterleaved signal. For each hard-decision vector, at least one syndrome calculator (2241) calculates a syndrome vector. The syndrome vector is analyzed by a syndrome error estimator (2251) having an associated syndrome pattern memory (2271). A comparator (260) analyzes error counter totals from each syndrome error estimator.

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