Pulse or digital communications – Repeaters – Testing
Patent
1988-09-22
1989-11-28
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
H04K 104, H04L 900
Patent
active
048842842
ABSTRACT:
A receiver in a spread spectrum communication system includes: a noise detector for detecting noises of a spread spectrum input signal; an initial synchronization circuit including a correlator for detecting a correlation of the spread spectrum input signal, a detector circuit for detecting an output of the correlator, and a comparator for receiving an output of the detector circuit and outputting a correlation detection signal; a synchronization holding circuit for receiving the correlation detection signal to perform synchronization holding and outputting a synchronization holding signal during the synchronization holding; and a control circuit for detecting if the synchronization holding signal is outputted within a predetermined period, and if not, controlling a reference voltage to be supplied to the comparator in accordance with the noise detection output of the noise detecting means.
REFERENCES:
patent: 4121159 (1978-10-01), Lampert
patent: 4538281 (1985-08-01), Rajan
patent: 4559633 (1985-12-01), Kan et al.
patent: 4587661 (1986-05-01), Schiff
patent: 4752939 (1988-06-01), Amoroso et al.
Cangialosi Salvatore
Ferguson Jr. Gerald J.
Kabushiki Kaisha Kenwood
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