An iterative hyperplane projection based affine projection algorithm for fast converging space-time adaptive decision-directed equalizer

Won Cheol Lee, Chul Ryu, Jin Ho Park

Research output: Contribution to journalArticlepeer-review

Abstract

This paper introduces an efficient affine projection algorithm (APA) using iterative hyperplane projection. The inherent effectiveness against the rank deficient problem has led APA to be the preferred algorithm to be employed for various applications over other variety of fast converging adaptation algorithms. However, the amount of complexity of the conventional APA could not be negligible because of the accomplishment of sample matrix inversion (SMI). Another issue is that the "shifting invariance property," which is typically exploited for single channel case, does not hold ground for space-time decision-directed equalizer (STDE) application deployed in single-input-multi- output (SIMO) systems. Therefore, fast adaptation schemes, such as fast traversal filter based APA (FTF-APA), becomes impossible to utilize. The motivation of this paper deliberates on finding an effective algorithm on the basis of APA, which yields low complexity while sustaining fast convergence as well as excellent tracking ability. The performance of the proposed method is evaluated under wireless SIMO channel in respect to bit error rate (BER) behavior and computational complexity, and upon completion, the validity is confirmed. The performance of the proposed method is evaluated under wireless SIMO channel in respect to bit error rate (BER) behavior and computational complexity, and upon completion, the validity is confirmed.

Original languageEnglish
Pages (from-to)3673-3681
Number of pages9
JournalIEICE Transactions on Communications
VolumeE87-B
Issue number12
StatePublished - Dec 2004

Keywords

  • Affine projection algorithm
  • Hyperplane projection
  • Multiple antennas
  • Single-output-multiple-output (SIMO) systems
  • Space-time equalizer

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