Complex interference optimization for power loss reduction in MIMO-THP transmission

C. Masouros, M. Sellathurai, T. Ratnarajah, Y. C. Liang

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

1 Citation (Scopus)

Abstract

Power loss is one of the major drawbacks in multiple input multiple output Tomlinson Harashima precoding (MIMO-THP) schemes. In this work we explore the potential of alleviating this by optimizing the interference to be canceled. Since both the desired and interfering signals originate from the base station (BS) of the downlink system, the resulting interference can be influenced to reduce the transmission power required to cancel it, without altering the information content of the downlink message. The aim is to bring the interference closer to the replica of the desired symbol in the modulo-extended constellation. By doing so, the quantized distance between the useful signal and interference is reduced and therefore the power required to pre-subtract interference is decreased. The presented analysis and results show a considerable transmit power reduction with the proposed technique compared to conventional MIMO-THP for both zero forcing (ZF) and minimum mean squared error (MMSE) approaches.

Original languageEnglish
Title of host publication2011 Conference Record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers (ASILOMAR)
PublisherIEEE
Pages1278-1282
Number of pages5
ISBN (Electronic)9781467303231
ISBN (Print)9781467303217
DOIs
Publication statusPublished - 26 Apr 2012
Event45th Asilomar Conference on Signals, Systems and Computers 2011 - Pacific Grove, CA, United States
Duration: 6 Nov 20119 Nov 2011

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Conference

Conference45th Asilomar Conference on Signals, Systems and Computers 2011
Abbreviated titleASILOMAR 2011
CountryUnited States
CityPacific Grove, CA
Period6/11/119/11/11

Keywords

  • known interference
  • multi-user MIMO
  • non-linear precoding
  • Tomlinson-Harashima precoding

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

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