Apparatus and method for fine synchronization of a communication

Details Apparatus and method for fine synchronization of a communication Apparatus and method for fine synchronization of a communication

1987-04-30

1989-02-07

Envall, Jr., Roy N.

Pulse or digital communications

Spread spectrum

Direct sequence

375111, 375114, 370106, H04C 700

Patent

active

048037036

ABSTRACT:
A system and method is described for synchronizing a paging receiver decoder to receive information in the form of digitally encoded signals. The digital signals include a synchronization signal followed by message data. The synchronization signal includes a first and second portion of the synchronization signal. The decoding means is synchronized to the first portion for generating a timing signal. The decoder then measures a phase relationship between the timing signal and the second portion of the synchronization signal. The timing signal generated by the decoder is adjusted according to the phase relationship to improve the decoding of the incoming information. In a second embodiment, a second synchronization signal is transmitted for statistically improving the accuracy of the timing signal.

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patent: 4663623 (1987-05-01), Lax et al.
patent: 4680621 (1987-07-01), Baker et al.
patent: 4688218 (1987-08-01), Blineau et al.

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