Pulse or digital communications – Synchronizers
Patent
1996-10-08
1998-09-08
Ghebretinsae, Temesghen
Pulse or digital communications
Synchronizers
375365, 370503, H04L 700
Patent
active
058056467
ABSTRACT:
A synchronization method and apparatus for synchronizing a receiver, such as a radiotelephone operable in a cellular communication system with a transmitter. A synchronization signal is transmitted within a multiframe of a control signal to the receiver, which upon powering up detects an undifferentiated digital bit stream and divides the bits into a succession of discrete portions or bins. Energy accumulations within each such portion are calculated, and a space-profile metric of those portions falling within a synchronization burst pattern computed. Space-profile metrics of adjacent portions are also computed. Taking the differences between a given portion and portions prior to and after the given portion, a difference metric is utilized to better predict the occurrence of a multiframe boundary, facilitating synchronization, despite the presence of other high-power bursts within the transmission.
REFERENCES:
patent: 5436935 (1995-07-01), Berbhard et al.
patent: 5574754 (1996-11-01), Kurihara et al.
patent: 5646947 (1997-07-01), Cooper et al.
Ericsson Inc.
Ghebretinsae Temesghen
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