Digital receiver device for DSSS-encoded signals

Details Digital receiver device for DSSS-encoded signals Digital receiver device for DSSS-encoded signals

2011-06-14

2011-06-14

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S140000, C375S142000, C375S143000, C375S145000, C375S149000, C375S150000, C375S343000, C708S314000

Reexamination Certificate

active

07961776

ABSTRACT:
A device for decoding a direct sequence spread spectrum-encoded binary message includes a sampler that captures at least one sequence of binary samples corresponding to one bit of the transmitted message. The captured sequence of samples are applied to a filter matched to the spreading code used, thus making it possible to delete the spreading applied to the original message. The device further includes, at the output of the sampler, an error correction block including a memory storing a plurality of binary sequences corresponding to all of the possible values for a captured sequence of samples. A replacement circuit replaces the captured sequence of samples with the stored sequence, thereby minimizing the number of samples different from the captured sequence of samples, and allowing the stored sequence to be applied to the matched filter.

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Preliminary French Search Report and Written Opinion, FR 05 12094, dated Sep. 1, 2006.

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