A nonlinear programming approach to CDMA multiuser detection

A. Yener, R. D. Yates, S. Ulukus

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

18 Scopus citations

Abstract

The optimum bit detector for multiuser CDMA systems has an exponential complexity in the number of users. Many suboptimum receivers have been developed to achieve good performance with less complexity. We approximate the solution of the optimum multiuser detection problem using nonlinear programming relaxations. We observe that some popular suboptimum receivers correspond to relaxations of the optimal detection problem. In particular, one approximation method yields to iterative solutions which correspond to previously proposed heuristic nonlinear detectors. We identify the convergence properties of these iterative detectors. We also propose a relaxation that yields a receiver which we call the generalized MMSE detector. We give a simple iterative implementation of the detector. Its performance is evaluated and comparisons to other suboptimum detection schemes are given.

Original languageEnglish (US)
Title of host publicationConference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers
EditorsMichael B. Matthews
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1579-1583
Number of pages5
ISBN (Electronic)0780357000, 9780780357006
DOIs
StatePublished - Jan 1 1999
Event33rd Asilomar Conference on Signals, Systems, and Computers, ACSSC 1999 - Pacific Grove, United States
Duration: Oct 24 1999Oct 27 1999

Publication series

NameConference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers
Volume2

Other

Other33rd Asilomar Conference on Signals, Systems, and Computers, ACSSC 1999
CountryUnited States
CityPacific Grove
Period10/24/9910/27/99

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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    Yener, A., Yates, R. D., & Ulukus, S. (1999). A nonlinear programming approach to CDMA multiuser detection. In M. B. Matthews (Ed.), Conference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers (pp. 1579-1583). [832014] (Conference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers; Vol. 2). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ACSSC.1999.832014