Method and apparatus for cell search for W-CDMA with...

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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C375S149000

Reexamination Certificate

active

07110438

ABSTRACT:
The invention discloses a cell search method for a CDMA system for a three-stage cell search procedure. The cell search method have the steps of matching of incoming signals by a chip matched filter; over-sampling the incoming signals N times against a chip rate by a sampling device; transmitting the N over-samplers into a serial test unit, selecting a best sample among N over-samples by the serial test unit controlled by a first stage detector; and transmitting the best sample of the N over-samples into a second stage detector and a third stage detector for a trial. The best sample of the N over-samples has a maximum sampling value of the N over-samples. The invention significantly reduces the effects of non-ideal sampling so as to accomplish fast cell search.

REFERENCES:
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patent: 6185244 (2001-02-01), Nyström et al.
patent: 6275545 (2001-08-01), Suzuki
patent: 6289007 (2001-09-01), Kim et al.
patent: 6385259 (2002-05-01), Sung et al.
patent: 6831929 (2004-12-01), Sriram et al.
patent: 7023831 (2006-04-01), Okuyama
patent: 2002/0034944 (2002-03-01), Tanno et al.

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