Pulse or digital communications – Repeaters – Testing
Patent
1989-09-18
1990-08-28
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
H04K 100
Patent
active
049531786
ABSTRACT:
There is disclosed a spread spectrum communication system comprising a modulation unit provided in the transmission side for transmitting a composite spread spectrum signal after modulating an information signal by the first and second carrier, and a demodulation unit in the reception side having an automatic gain control (AGC) function and for demodulating a primary-modulated signal by spread code generated therein or despreading. The demodulating unit comprises an input circuit for receiving the composite spread spectrum signal, a control circuit for controlling a level of the composite spread spectrum signal, a separating circuit for separating a spread code signal and a spread spectrum signal from the composite signal, a circuit for generating the primary-modulated signal based on the spread code, a detecting circuit for detecting an envelope signal of the demodulated primary-modulated signal from the generating circuit, a converting circuit for converting the envelope signal into a control signal, and a supplying circuit for supplying the control signal to the control circuit.
REFERENCES:
patent: 4163944 (1979-08-01), Chambers et al.
patent: 4164628 (1979-08-01), Ward et al.
patent: 4809296 (1989-02-01), Braun et al.
patent: 4879726 (1989-11-01), Kobayashi et al.
Cangialosi Salvatore
Victor Company of Japan Ltd.
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