A sphere decoder with approximate QR decomposition for frequency-selective channels

Luis G. Barbero, Pei Xiao, T. Ratnarajah, Mathini Sellathurai, C. F. N. Cowan

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

1 Citation (Scopus)

Abstract

This paper presents a method to significantly reduce the preprocessing complexity of the sphere decoder (SD) in frequency-selective channels. The method consists of calculating an approximate QR Decomposition (AQRD) of the channel matrix, making use of its special Toeptliz and block-Topelitz structure in single and multiple-antenna frequency-selective channels, respectively. The AQRD obtains the QR decomposition of a small submatrix of the channel matrix and extends that result to the rest of the matrix, resulting in a considerable complexity reduction compared to the original full QR Decomposition (FQRD). Simulation results show that, despite the lower complexity of the AQRD, it causes only a small bit error rate (BER) performance degradation in the SD.

Original languageEnglish
Title of host publication2010 IEEE International Conference on Communications
PublisherIEEE
ISBN (Electronic)9781424464043
ISBN (Print)9781424464029
DOIs
Publication statusPublished - 10 Jul 2010
Event2010 IEEE International Conference on Communications - Cape Town, South Africa
Duration: 23 May 201027 May 2010

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607
ISSN (Electronic)1938-1883

Conference

Conference2010 IEEE International Conference on Communications
Abbreviated titleICC 2010
CountrySouth Africa
CityCape Town
Period23/05/1027/05/10

Keywords

  • Approximate QR decomposition
  • Frequency-selective MIMO channel
  • Sphere decoder

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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  • Cite this

    Barbero, L. G., Xiao, P., Ratnarajah, T., Sellathurai, M., & Cowan, C. F. N. (2010). A sphere decoder with approximate QR decomposition for frequency-selective channels. In 2010 IEEE International Conference on Communications [5502539] (IEEE International Conference on Communications). IEEE. https://doi.org/10.1109/ICC.2010.5502539