SERIAL AND PARALLEL SEARCH WITH PARALLEL I-Q MATCHED-FILTER FOR PN ACQUISITION IN PCS

Authors
Citation
Cc. Fan et Zh. Tsai, SERIAL AND PARALLEL SEARCH WITH PARALLEL I-Q MATCHED-FILTER FOR PN ACQUISITION IN PCS, IEICE transactions on communications, E79B(9), 1996, pp. 1278-1286
Citations number
8
Categorie Soggetti
Engineering, Eletrical & Electronic",Telecommunications
ISSN journal
09168516
Volume
E79B
Issue
9
Year of publication
1996
Pages
1278 - 1286
Database
ISI
SICI code
0916-8516(1996)E79B:9<1278:SAPSWP>2.0.ZU;2-R
Abstract
For direct sequence spread spectrum systems, the performance of PN seq uence acquisition can be significantly affected if data modulation is present. However, the data modulation often exists during the reacquis ition of a PCS radio channel. This study proposes and analyzes two sch emes which are designed to improve acquisition process for PN sequence under data modulation. Both designs are based upon a PN acquisition r eceiver with parallel I-Q matched filters. The first scheme employs a serial search strategy with verification mode. The second scheme, whic h is still based upon the same parallel acquisition receiver, employs the parallel search strategy. We show that the second scheme is capabl e of providing faster acquisition under data modulation than the first serial search scheme using the same number of I-Q matched filter. We believe it should become a very good alternative for the acquisition o f data modulated PN sequences in personal communications.