Pulse or digital communications – Repeaters – Testing
Patent
1988-09-01
1990-06-12
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
H04K 100
Patent
active
049339532
ABSTRACT:
An initial synchronization system for spread spectrum communication including a despreader-demodulator circuit for despreading and demodulating an input signal according to a despread control signal, a decoder circuit for decoding a data signal demodulated by the despreader-demodulator circuit and outputting a code synchronization signal when code synchronization is taken, a correlation detector circuit in response to the input signal for detecting the correlation of the input signal and generating the despread control signal and a correlation detection signal, and a control circuit for outputting an initial synchronization start signal to the correlation detector circuit so as to cause the correlation detector circuit to start the initial synchronization if the code synchronization signal is not generated within a predetermined period after the correlation detection signal was generated.
REFERENCES:
patent: 4121159 (1978-10-01), Lampert
patent: 4351064 (1982-09-01), Ewanus
patent: 4752939 (1988-06-01), Amoroso et al.
Cangialosi Salvatore
Kabushiki Kaisha Kenwood
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