Modem for use in multipath communication system

Details Modem for use in multipath communication system Modem for use in multipath communication system

H - Electricity

04

B

325/3

H04B 7/015 (2006.01) H04B 1/707 (2006.01) H04L 1/00 (2006.01) H04L 27/18 (2006.01)

Patent

CA 1256503

ABSTRACT A modem in which the transmitter uses spectrum spreading techniques applied to sequentially supplied input bits, a first group thereof having one spread spectrum sequence characteristic and a second group thereof having a different spread spectrum sequence characteristic, the spread spectrum bits being modulated and transmitted. The receiver generates complex samples of the received modulated signal at a baseband frequency and uses a detector for providing signal samples of the complex samples which are time delayed relative to each other. A selected number of the time delayed samples are de-spread and demodulated and the de-spread and demodulated samples are then combined to form a demodulated receiver output signal.

541144

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