Modified branch metric for decoders and equalizers

Details Modified branch metric for decoders and equalizers Modified branch metric for decoders and equalizers

2011-07-26

2011-07-26

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C714S755000

Reexamination Certificate

active

07986753

ABSTRACT:
A modified branch metric for decoders and equalizers is described. In one embodiment the branch metric includes determining a set of branch metric values for symbols of a received digital signal, the branch metric values indicating a correlation between symbols obtained using a reduced calculation set, the reduced calculation set being obtained by adding a common term to all of the branch metric values before determining the correlation. The branch metric may be followed by determining path metrics for paths through a decision tree using the branch metric values, and selecting a path and a corresponding symbol sequence in the received digital signal using the path metric values.

REFERENCES:
patent: 2006/0015797 (2006-01-01), Miyaoka
patent: 2006/0143554 (2006-06-01), Sudhakar et al.
patent: 2006/0150058 (2006-07-01), Wang et al.
patent: 2007/0076826 (2007-04-01), Stockmanns et al.

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