Quasi-ML detectors with soft output and low complexity for PSK modulated MIMO channels

Baldur Steingrimsson, Zhi Quan Luo, Kon Max Wong

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

4 Scopus citations

Abstract

We propose a quasi-mjiximum-likelihood (quasi-ML) detection scheme with soft output and low decoding complexity for multiple antenna wireless channels modulated with phase-shift keying (PSK). These detectors, which we refer to as quasi-ML PSK decoders, deploy a nonlinear programming relaxation and are able to achieve the performance of exact ML detection in a wide variety of coded or uncoded and PSK modulated multiple-antenna channels. Yet, the decoding complexity of the soft quasi-ML PSK decoders is much less than of ML detectors using exhaustive search. We also demonstrate that the quasi-ML PSK decoders possess favorable complexity properties compared to the existing sphere decoders.

Original languageEnglish (US)
Title of host publication2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages427-431
Number of pages5
ISBN (Electronic)078037858X
DOIs
StatePublished - 2004
Event4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003 - Rome, Italy
Duration: Jun 15 2003Jun 18 2003

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Volume2004-January

Other

Other4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003
CountryItaly
CityRome
Period6/15/036/18/03

Keywords

  • Low-rank relaxation
  • Nonlinear programming relaxation
  • Quasi-ML detection
  • Soft channel decoding

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