MAP detector with a single state metric engine

Details MAP detector with a single state metric engine MAP detector with a single state metric engine

2011-06-07

2011-06-07

Alphonse, Fritz (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S794000, C714S786000

Reexamination Certificate

active

07958437

ABSTRACT:
A maximum a posteriori detector includes a single state metric engine that performs forward and backward processing to produce forward and backward state metrics. The state metric engine includes a plurality of processes that each perform both the forward and the backward processing operations. The system further includes memory that stores the forward and backward state metrics that are produced by the engine in appropriate orders for the forward and backward processing. A number of multiplexers provide the appropriate branch metrics and apriori values to adder strings in each of the processors in accordance with an associate decoding trellis.

REFERENCES:
patent: 5933462 (1999-08-01), Viterbi et al.
patent: 6028899 (2000-02-01), Petersen
patent: 6901119 (2005-05-01), Cideciyan et al.
patent: 7020214 (2006-03-01), Bickerstaff
patent: 7209527 (2007-04-01), Smith et al.
patent: 7810018 (2010-10-01), Cheng

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