Initial synchronization method and receiver for DS-CDMA inter ba

Details Initial synchronization method and receiver for DS-CDMA inter ba Initial synchronization method and receiver for DS-CDMA inter ba

1998-01-06

2000-03-14

Tse, Young T.

Pulse or digital communications

Repeaters

Testing

375207, 370335, 370342, H04B 7216, H04B 1707

Patent

active

060382503

ABSTRACT:
Cells are searched at a high speed using an initial synchronization method and a receiver for a DS-CDMA inter base station asynchronous cellular system. A base band received signal is input to a matched filter and is correlated with a spread code supplied from a spread code generator. A signal electric power calculator calculates the electric power of the correlation output of the matched filter, and outputs the result to a long code synchronization timing determiner, a threshold value calculator, and a long code identifier. During the initial cell search, the spread code generator outputs a short code #0 that is common to the control channel of each of the base stations. After the long code synchronization timing has been determined, each of the segments of the N chips which constitutes a portion of the synthesized spread code sequence synthesized from a long code #i that is unique to each of the base stations and the short code #0 is sequentially replaced and output.

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Kenichi Higuchi, Mamoru Sawahashi and Fumiyuki Adachi, "Two-Stage Rapid Long Code Acquisition Scheme in DS-CDMA Asynchronous Cellular System", Technical Report if IEICE, CS96-19, RCS96-12 (May 1996), pp. 27-32.

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