Spread-spectrum demodulator

Details Spread-spectrum demodulator Spread-spectrum demodulator

2003-12-02

2008-09-30

Ghayour, Mohammad (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000, C375S144000, C375S147000, C375S150000, C375S152000

Reexamination Certificate

active

07430233

ABSTRACT:
A spread-spectrum demodulator includes a spreading code generating section, correlation value computing section, data signal demodulating section, peak signal detecting section, and spreading code generation control section. The spreading code generating section generates a spreading code for correlating with a received spread signal. The correlation value computing section computes a correlation value between the spread signal and the spreading code output from the spreading code generating section. The data signal demodulating section detects the peak of an output from the correlation value computing section and demodulates a data signal on the basis of the detected peak. The peak signal detecting section detects the peak of the output from the correlation value computing section. The spreading code generation control section changes the shifting direction of the spreading code relative to the spread signal every time a peak is detected by the peak signal detecting section.

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Marubayashi et al., “Spread Spectrum Communication and Its Applications”, IEICE, 1998, pp. 94-145, ISBN4-88562-163X, Abstract.

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