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Multiplexer-related

Spread-spectrum-communication-apparatus

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Spread spectrum communication apparatus

Details

Inventors: Saito, Katsuo;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Chin; Stephen
Assistant Examiner: Roundtree; Joseph
Attorney, Agent or Firm: Fitzpatrick, Cella Harper & Scinto

A spread spectrum communication apparatus comprises a correlator for correlating a received signal and a reference signal, a synchronizing circuit for synchronizing codes for spread spectrum communication according to a correlation output of the correlator, a controller for controlling a transmission power according to the output of the correlator, and a detector for detecting the output of the correlator. The synchronizing circuit synchronizes the codes according to the output of the correlator detected by the detector. The controller controls the transmission power according to the output of the correlator detected by the detector.

DETAILED DESCRIPTION It is an object of the invention to rapidly and properly set a transmission power.
Another object of the invention is to properly set a transmission power before the synchronization is obtained at the start of the communication or when the synchronization is released by a fault during the communication.
Still another object of the invention is to reduce an influence on another communication apparatus by a transmission signal from an apparatus of the invention.
Further another object of the invention is to improve the reliability of the transmission power control.
Further another object of the invention is to provide a spread spectrum communication apparatus for controlling a transmission power by a signal for synchronization.
Other objects and features of the present invention will become apparent from the following detailed description and the appended claims with reference to the accompanying drawings.

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