Spread spectrum communication apparatus

摘要

A spread spectrum communication apparatus includes a first transmitter-receiver comprising a receiver block for performing a reverse spread spectrum processing of the spectrum by receiving a transmission signal which took the spread spectrum processing by a first PN code and synchronizing the phase of the transmission signal to the first PN code, demodulating the reverse spread spectrums received signal and detecting whether the received signal synchronizes the phase to the first PN code or not so as to output the synchronization detecting signal, a control signal generator for generating a control signal to shift the phase of the first PN code for the spread spectrum processing to the other transmitter-receiver so as to establish the reception synchronization based on the synchronization detecting signal of the receiver block, and a transmitter block for multiplexing the controlled signal to an information for transmission and performing a spread spectrum processing by a second PN code, a second transmitter-receiver comprising of a receiver block for performing a reverse spread spectrum processing of the spectrum by receiving the transmission signal which took the spread spectrum processing in the transmitter-receiver and synchronizing the phase of the transmission signal to the second PN code, demodulating the received signal and separating the controlled signal from the received signal so as to output it, a phase controller for generating a phase control signal to shift the phase of the first PN code for the spread spectrum processing so as to establish the reception synchronization of the other transmitter-receiver which can not establish the reception synchronization based on the control signal separated from the receiver block, and a transmitter block for generating the first PN code by a clock pulse which synchronizes the phase to the spread spectrum demodulator of th receiver block, performing the spread spectrum processing to an information signal for the transmission by the first PN code and transmitting it, and a phase shifter connected between the receiver block and the transmitter block of the second transmitter-receiver, for shifting the phase of the first PN code based on the phase control signal of the receiver block of the second transmitter-receiver.