Parallel architecture digital filter and spread spectrum...

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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C375S140000, C375S152000, C375S343000

Reexamination Certificate

active

07058119

ABSTRACT:
This invention relates to parallel architecture digital filter and signal receiver with spectrum spreading using such a filter, the filter may have p shift registers (Rp, Ri) with means for calculating a weighted sum of stored samples in the registers, p weighted sums (Skp, Ski) may be obtained and recombined with number p being, for example, equal to 2.

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patent: 5381357 (1995-01-01), Wedgwood et al.
patent: 5781076 (1998-07-01), Iwamatsu et al.
patent: 5809074 (1998-09-01), Werner et al.
patent: 19627305 (1997-07-01), None
patent: WO93/23924 (1993-11-01), None
Couturier, et al., “Experimental Results for Four Phase Digital Matched Filtering of Spread Spectrum Waveforms”, vol. 34, No. 8, 5 pages.

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