Spread spectrum transmitter and spread spectrum receiver
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United States of America Patent
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-
Aug 22, 2006
Grant Date -
Jul 24, 2003
app pub date -
Jan 2, 2003
filing date -
Jan 18, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A spread spectrum transmitter provides delays having different magnitudes to spread spectrum (SS) signals for a plurality of channels, and multiplexes the SS signals to generate transmission multiplex SS signal. A spread spectrum receiver calculates a partial correlation value between the transmission multiplex SS signal and spreading codes multiplied to the SS signals, multiplies the partial correlation values by a prescribed matrix prepared based on each orthogonal code sequence to calculate a plurality of orthogonal correlation values. The receiver identifies for a respective channel each parallel data sequence related in advance to an orthogonal code sequence whose orthogonal correlation value is a maximum, corrects delay differences of the parallel data sequences, and then performs sampling and parallel-serial conversion to obtain a serial demodulated data sequence.
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