Low complexity soft-input Viterbi decoding for digital...

Details Low complexity soft-input Viterbi decoding for digital... Low complexity soft-input Viterbi decoding for digital...

2006-06-20

2009-10-06

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S261000, C375S341000

Reexamination Certificate

active

07599441

ABSTRACT:
A DVB-H bit-interleave coded modulation/demodulation system and method includes a convolutional encoder; an interleaver operatively connected to the convolutional encoder; a quadrature amplitude modulation (QAM) mapper operatively connected to the interleaver; a channel component operatively connected to the QAM mapper; a QAM demapper operatively connected to the channel component; a de-interleaver operatively connected to the QAM demapper; and a Viterbi decoder operatively connected to the de-interleaver. Preferably, the interleaver comprises a bit-wise interleaver and a symbol-wise interleaver operatively connected to the bit-wise interleaver. Preferably, the de-interleaver comprises a bit-wise de-interleaver; and a symbol-wise de-interleaver operatively connected to the bit-wise de-interleaver. The de-interleaver may be adapted to decode a soft decision metric for any of a QPSK, 16QAM, and 64QAM modulation. The de-interleaver may be adapted to decode a soft decision metric computation comprising a log-likelihood ratio soft decision metric of a binary bit stream of a signal.

REFERENCES:
patent: 7032156 (2006-04-01), Yu et al.
patent: 7075970 (2006-07-01), Maru
patent: 2004/0246888 (2004-12-01), Peron
patent: 2006/0109926 (2006-05-01), Jalali et al.
patent: 2007/0171808 (2007-07-01), Wu et al.
patent: 2418118 (2006-03-01), None

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