Complexity reduction for vector precoding using QoS requirements

Christos Masouros, Tharm Ratnarajah, Mathini Sellathurai

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

Abstract

We propose a low-complexity vector precoding (VP) scheme for the downlink of multi-user multiple input multiple output (MU-MIMO) systems. Instead of performing a full sphere search to maximize the receive signal to noise ratio (SNR), the search for the perturbation vectors finishes once a threshold SNR value is reached, thus saving significant computational burden at the transmitter. This threshold is determined by the quality of service (QoS) requirements of the mobile users. To evaluate the advantages of the proposed technique compared to VP, we analytically calculate its computational complexity in terms of the volume of the associated search space. The results show that the proposed thresholded VP (TVP) offers a significantly reduced complexity compared to VP.

Original languageEnglish
Title of host publication2013 IEEE International Conference on Acoustics, Speech, and Signal Processing
PublisherIEEE
Pages5094-5098
Number of pages5
ISBN (Electronic)9781479903566
DOIs
Publication statusPublished - 21 Oct 2013
Event38th IEEE International Conference on Acoustics, Speech and Signal Processing 2013 - Vancouver, BC, Canada
Duration: 26 May 201331 May 2013

Publication series

NameIEEE International Conference on Acoustics, Speech and Signal Processing
ISSN (Print)1520-6149
ISSN (Electronic)2379-190X

Conference

Conference38th IEEE International Conference on Acoustics, Speech and Signal Processing 2013
Abbreviated titleICASSP 2013
CountryCanada
CityVancouver, BC
Period26/05/1331/05/13

Keywords

  • complexity reduction
  • multi-user MIMO
  • non-linear precoding
  • sphere encoding
  • Vector precoding

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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  • Cite this

    Masouros, C., Ratnarajah, T., & Sellathurai, M. (2013). Complexity reduction for vector precoding using QoS requirements. In 2013 IEEE International Conference on Acoustics, Speech, and Signal Processing (pp. 5094-5098). (IEEE International Conference on Acoustics, Speech and Signal Processing). IEEE. https://doi.org/10.1109/ICASSP.2013.6638632