Summary
|
For Full-Text PDF, please login, if you are a member of IEICE, or go to Pay Per View on menu list, if you are a nonmember of IEICE. |
|
Fast Acquisition of PN Sequences in DS/CDMA Systems Sergei BYCHENKOV Vladimir MIKHAILOV Kohichi SAKANIWA Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Vol.E85-A No.11 pp.2498-2520 Publication Date: 2002/11/01 Online ISSN: DOI: Print ISSN: 0916-8508 Type of Manuscript: PAPER Category: Communication Theory and Signals Keyword: fast acquisition, PN sequence, decomposition of sequences, component sequence, DS/CDMA, Full Text: PDF(758KB)>>
Summary: DS/CDMA systems employing long-period PN sequences are becoming a widespread standard of wireless communication systems. However, fast acquisition of long-period PN sequences at a low hardware cost is conventionally a difficult problem. This paper proposes a new fast acquisition algorithm for a class of PN sequences, which includes m- and GMW sequences as special cases, and shows that the mean (correct) acquisition time can be considerably reduced under input SNR values well below those used in modern DS/CDMA systems. Its fast acquisition capability is based on a decomposition of long PN sequences into a number of short ones and achieves a significantly reduced code phase uncertainty of acquisition at relatively small hardware cost. It can be applied as a (part of) acquisition system of a DS/CDMA system instead of a slow sliding correlator or a costly matched filter. | ||||||||||
| ||||||||||