A scalable performance-complexity tradeoff for vector precoding by partial perturbation

Christos Masouros, Tharm Ratnarajah, Mathini Sellathurai

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

1 Citation (Scopus)

Abstract

We explore a performance-complexity tradeoff for vector precoding (VP) for the downlink of multi-user multiple input multiple output (MU-MIMO) systems. We introduce this tradeoff by employing a partial perturbation in the vector precoding, where the perturbation optimization is applied to a subset of the transmitted symbols. This greatly reduces complexity compared to conventional VP where the optimization involves all transmit symbols, at the expense of a reduced performance. We show that this tradeoff is scalable by means of the number of users to be perturbed and explore how it can be optimized by changing the size of this subset of users. The presented results show that partially perturbing the data provides a favorable performance-complexity tradeoff compared to conventional VP and increases the power efficiency of VP.

Original languageEnglish
Title of host publication16th IEEE International Workshop on Signal Processing Advances in Wireless Communications 2015
PublisherIEEE
Pages575-579
Number of pages5
ISBN (Print)9781479919307
DOIs
Publication statusPublished - 28 Jun 2015
Event16th IEEE International Workshop on Signal Processing Advances in Wireless Communications 2015 - Stockholm, Sweden
Duration: 28 Jun 20151 Jul 2015

Conference

Conference16th IEEE International Workshop on Signal Processing Advances in Wireless Communications 2015
Abbreviated titleSPAWC 2015
CountrySweden
CityStockholm
Period28/06/151/07/15

Keywords

  • complexity reduction
  • multi-user MIMO
  • power efficiency
  • Vector perturbation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

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    Masouros, C., Ratnarajah, T., & Sellathurai, M. (2015). A scalable performance-complexity tradeoff for vector precoding by partial perturbation. In 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications 2015 (pp. 575-579). [7227103] IEEE. https://doi.org/10.1109/SPAWC.2015.7227103