Spread spectrum demodulator

Details Spread spectrum demodulator Spread spectrum demodulator

1992-02-18

1994-01-18

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, 375 83, 329304, 329306, 329307, H04L 2730

Patent

active

052805387

ABSTRACT:
A spread spectrum demodulator for use with a phase-shift-keying modulated spread spectrum signal used in mobile satellite communications. An objective of the spread spectrum demodulator is to perform tracking by producing from a correlation pulse signal an error signal having a time discrimination characteristic. The spread spectrum demodulator generates from the correlation pulse signal an error signal whose level varies in response to a phase difference between a pseudonoise signal contained in a received signal and a reference pseudonoise signal. A clock in synchronism with the received signal is generated from this error signal, thereby demodulating the received signal.

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R. C. Dixon, Spread Spectrum Systems; (John Wiley & Sons, 1984), pp. 254-257.
Ushiyama et al, "High Precision Baseband Delay-Lock Loop"; Proc's of the Spring 1990 Meeting of the Assoc. of Electric Info. Communications, (In Japanese), p. 2-248.
Ikegami et al, "Experiments on Spread Spectrum Mobile Satellite Communication with Coherent Matched Filter Receiver"; Proc's of IEEE Int'l Symp. on Spread Spectrum Techniques & Appl's, pp. 158-163; Sep. 1990.

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