Excavating
Patent
1989-12-06
1994-05-10
Baker, Stephen M.
Excavating
375 80, H03M 1312, H03D 302
Patent
active
053115236
ABSTRACT:
A carrier phase synchronous type maximum likelihood decoder for estimating a maximum likelihood sequence of data sequence includes N memories for memorizing N partial series of data sequence; N carrier phase adjust loop, each provided correspondingly to N memories, each for adjusting a carrier phase of received data series on the basis of a partial series memorized in corresponding memory; N likelihood function calculate parts, each provided correspondingly to N memories and N carrier phase adjust parts, each for calculating likelihoods of partial series by utilizing partial series memorized in corresponding memory and an output of corresponding carrier phase adjust loop, a compare and modulation part for comparing N calculated likelihoods and for selecting partial series having a maximum likelihood from memory, thereby, the satisfactory operation in the low S/N ratio can be realized and the satisfactory phase tracking characteristics can be obtained.
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Murakami Junzo
Serizawa Mutsumu
Baker Stephen M.
Kabushiki Kaisha Toshiba
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