A Systolic Array Implementation of the One-Shot Decorrelating Detector Used for Mobile CDMA Communications

  • Authors:

  • Timothy F. Myers;Mario E. Magaña

  • Affiliations:

  • Department of Electrical and Computer Engineering, Oregon State University, Corvallis, Oregon 97331, U.S.A.;Department of Electrical and Computer Engineering, Oregon State University, Corvallis, Oregon 97331, U.S.A.

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 1999

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Abstract

A systolic array implementation of the one-shot decorrelating detector algorithm designed for Code-Division Multiple-Access (CDMA) spread spectrum communication systems used in mobile communications environments is developed. This detector has the advantage that it is near-far resistant, that is, it minimizes the interference effects that near-end users have on far-end users. However, its implementation requires the on-line inversion of the correlation matrix between the desired and interfering users. For this reason, a systolic computation approach is chosen to help solve the problem of fast on-the-fly matrix inversion. Performance of the proposed implementation is assessed via digital computer simulation. The implementation methodology presented here leads to a VLSI implementation structure.