Multirate adaptive filtering for DS/CDMA code acquisition

Hua Lung Yang, Wen-Rong Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Code acquisition in DS/CDMA systems is usually conducted using a correlator. However, in a multiuser access interference (MAl) environment, its performance is seriously degraded. The adaptive filtering scheme has been proposed to overcome this problem. Although this approach is effective, it requires high computational complexity. This paper proposes a multirate adaptive filtering scheme to alleviate this problem. The proposed scheme uses two adaptive filters operated in different rates. Due to downsampling operations, the computational complexity of the adaptive filters can be effectively reduced. We also theoretically analyze the mean acquisition time and the acquisition error probability. Simulations show that while the proposed scheme can have better performance, its computational complexity is only half of the conventional adaptive filtering method.

Original languageEnglish
Title of host publicationProceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2003
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages363-366
Number of pages4
ISBN (Electronic)0780382927, 9780780382923
DOIs
StatePublished - 1 Jan 2003
Event3rd IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2003 - Darmstadt, Germany
Duration: 14 Dec 200317 Dec 2003

Publication series

NameProceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2003

Conference

Conference3rd IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2003
CountryGermany
CityDarmstadt
Period14/12/0317/12/03

Keywords

  • Adaptive filters
  • Additive white noise
  • AWGN
  • Computational complexity
  • Correlators
  • Degradation
  • Gaussian noise
  • Multiaccess communication
  • Multiple access interference
  • Signal generators

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