Method and apparatus for decoding received data in a...

Details Method and apparatus for decoding received data in a... Method and apparatus for decoding received data in a...

2006-09-12

2006-09-12

Lamarre, Guy (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S796000

Reexamination Certificate

active

07107513

ABSTRACT:
A plurality of data streams, which are coded by a convolution code and where coding rates and modulation systems are set respectively, and multiplexed in time division so that multiplex data are composed. A signal-to-noise ratio monitor measures the strength of the noise included in the multiplex data. A comparator outputs a post signal when a comparison indicates that the measured noise strength is equal to greater than a preset value. A multiplex control signal generator inputs an initialization signal into a Viterbi decoder at a timing at which decoding of individual data streams is started based on the received post signal. The Viterbi decoder initializes the calculated path metric upon receipt of the initialization signal.

REFERENCES:
patent: 5363413 (1994-11-01), Vos
patent: 5771467 (1998-06-01), Sato
patent: 5949832 (1999-09-01), Liebetreu et al.
patent: 9-247003 (1997-09-01), None

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