Pulse or digital communications – Repeaters – Testing
Patent
1994-04-26
1998-08-11
Vo, Don N.
Pulse or digital communications
Repeaters
Testing
375367, 375206, H04B 169
Patent
active
057937940
ABSTRACT:
A spread spectrum receiving apparatus comprises: a reproducing circuit to reproduce a carrier signal from a reception signal and a diffusion code; a demodulation circuit to demodulate the reception signal into a base band signal on the basis of the carrier signal reproduced by the reproducing circuit; and a judgment circuit to judge the reception data from the base band signal from the demodulation circuit. The reproducing circuit has an operation circuit to arithmetically operate the reception signal and the diffusion code and a detection circuit to detect a difference between the phases of an output of the operation circuit and an output of an oscillator. The oscillator oscillates at a carrier frequency in accordance with a phase difference detected by the detecting circuit.
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Kanda Tetsuo
Kato Ichiro
Mochizuki Norihiro
Myojo Toshihiko
Nago Hidetada
Canon Kabushiki Kaisha
Vo Don N.
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