Acquisition matched filter for W-CDMA systems providing...

Details Acquisition matched filter for W-CDMA systems providing... Acquisition matched filter for W-CDMA systems providing...

2006-09-12

2006-09-12

Tse, Young T. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

Reexamination Certificate

active

07106787

ABSTRACT:
A system and method for acquiring a transmitted spread-spectrum signal uses a matched filter configuration that is preferably employed as a Stage 2 filter in the second phase of an initial signal acquisition procedure performed in the receiver. In operation, a Stage 1 filter matches a sequence which is repeated a number of times according to a second sequence within a secondary synchronization sub-channel of the spread-spectrum signal. The Stage 2 filter of the invention then filters the output of the Stage 1 filter in order to recover a secondary synchronization code. The Stage 2 filters the output of the Stage 1 filter using three matched filters of its own. The first and second filters sample different taps of a sequence output from the Stage 1 filter. The third filter samples a predetermined number of taps overlapping taps for the first and second filters in a way that resolves ambiguities with respect to the identification of the sequence. The ambiguity resolution performed by the third filter improves the frequency offset robustness and thus the overall performance of the receiver.

REFERENCES:
patent: 5293398 (1994-03-01), Hamao et al.
patent: 5428647 (1995-06-01), Rasky et al.
patent: 5796787 (1998-08-01), Chen et al.
patent: 5950131 (1999-09-01), Vilmur
patent: 6208683 (2001-03-01), Mizuguchi et al.
patent: 6266361 (2001-07-01), Huang et al.
patent: 6269088 (2001-07-01), Masui et al.
patent: 6665277 (2003-12-01), Sriram
patent: 6717930 (2004-04-01), Sezgin et al.
patent: 6801567 (2004-10-01), Schmidl et al.
patent: 6831929 (2004-12-01), Sriram et al.
patent: 6920123 (2005-07-01), Shin et al.
patent: 2002/0027898 (2002-03-01), Tanno et al.
patent: 2002/0057664 (2002-05-01), Sarkar
patent: 2002/0064146 (2002-05-01), Okuyama
patent: 2002/0064211 (2002-05-01), Chen et al.
patent: 2003/0095516 (2003-05-01), Ok et al.
patent: 2003/0099223 (2003-05-01), Chang et al.
Sophia Antipolis, 3rd Generation Partnership Project; Tehcnical Specification Gruop Radio Access Network; Physical layer—General description, Released 1999, 14 pages, Valbonne, France.
Sophia Antipolis, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical channels and mapping of transport channels onto physical channels (FDD), Released 1999, 45 pages, Valbonne, France.
Sophia Antipolis, 3rd Generation Partnership Product; Technical Specification Group Radio Access Network; Spreading and modulation (FDD), Released 1999, 26 pages, Valbonne, France.
Spread Spectrum Communications, 4pages.
Randy Roberts, The ABCs of Spread Spectrum—A Tutorial, 9 pages.
Jack P.F. Glas, On the Multiple Access Interference in a DS/FFH Spread Spectrum Communication System, last modified on Aug. 29, 1996 by Jack Glas, 9 pages, The Netherlands.
Introduction to CDMA, 15 pages.

Affiliated with

Also associated with

Rating

Acquisition matched filter for W-CDMA systems providing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acquisition matched filter for W-CDMA systems providing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acquisition matched filter for W-CDMA systems providing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3576800