Spread spectrum modulation and demodulation systems which accele

Details Spread spectrum modulation and demodulation systems which accele Spread spectrum modulation and demodulation systems which accele

1994-12-16

1996-12-10

Chin, Wellington

Pulse or digital communications

Repeaters

Testing

380 48, 375200, 370107, H04B 1500

Patent

active

055838847

ABSTRACT:
The present invention is an art of spread spectrum modulation systems, wherein a binary serial data is divided into a first bit data and a second bit data, the first bit data is primarily modulated, a spread code corresponding to the second bit data is selected, and the modulated data is spread by multiplying the primarily modulated first bit data by the selected spread code. In reception side, the spread code used for spreading in transmitter is detected in correlator, the second bit data is specified and the first bit data is demodulated.

REFERENCES:
patent: 4774715 (1988-09-01), Messenger
patent: 4894842 (1990-01-01), Broekhoven et al.
patent: 5144641 (1992-09-01), Akazawa et al.
patent: 5285472 (1994-02-01), Leonard et al.
patent: 5291515 (1994-03-01), Uchida et al.
patent: 5293398 (1994-03-01), Hamao et al.

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