An adaptive multiuser interference rejection algorithm for direct-sequence code division multiple access

Narayan B. Mandayam, Behnaam Aazhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper we consider a direct sequence code division multiple access (DS-CDMA) system from the framework of a discrete event dynamic system (DEDS) and develop infinitesimal perturbation analysis (IPA) for estimating the sensitivity of the average probability of bit-error in such systems. The above estimates are shown to be unbiased, and this technique is then further incorporated into a stochastic gradient algorithm for achieving adaptive multiuser interference rejection. Specifically, we develop an algorithm for an adaptive linear detector with the average probability of error being the minimization criterion. This algorithm is shown to converge, and the resulting detector performs better than both the matched filter detector as well as the minimum mean squared error (MMSE) detector.

Original languageEnglish (US)
Title of host publicationProceedings - 1994 IEEE International Symposium on Information Theory, ISIT 1994
Pages135
Number of pages1
DOIs
StatePublished - 1994
Externally publishedYes
Event1994 IEEE International Symposium on Information Theory, ISIT 1994 - Trondheim, Norway
Duration: Jun 27 1994Jul 1 1994

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8095

Other

Other1994 IEEE International Symposium on Information Theory, ISIT 1994
Country/TerritoryNorway
CityTrondheim
Period6/27/947/1/94

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Information Systems
  • Modeling and Simulation
  • Applied Mathematics

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