A transmit-power efficient MIMO-THP design

Christos Masouros*, Mathini Sellathurai, Tharm Ratnarajah

*Corresponding author for this work

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

2 Citations (Scopus)


In this paper, an improved multiple input multiple output Tomlinson-Harashima precoder (MIMO-THP) is introduced, where the transmit power loss is reduced based on optimizing the interference to be canceled. The concept behind the proposed technique builds on the fact that both the desired and interfering signals originate from the base station (BS) of the downlink system itself. Based on this observation, the proposed method influences the resulting interference, 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 replicas of the desired symbols for all users in the THP modulo-extended constellation. In this way, the power required to pre-subtract interference is decreased. Theoretical and simulation results both confirm that, by optimizing the interference to be canceled, the proposed technique offers a considerable transmit power reduction compared to conventional THP while securing an equal error rate performance.

Original languageEnglish
Title of host publication2012 IEEE International Symposium on Information Theory Proceedings
Number of pages5
ISBN (Electronic)9781467325790
ISBN (Print)9781467325806
Publication statusPublished - 27 Aug 2012
Event2012 IEEE International Symposium on Information Theory - Cambridge, MA, United States
Duration: 1 Jul 20126 Jul 2012

Publication series

NameIEEE International Symposium on Information Theory
ISSN (Print)2157-8095
ISSN (Electronic)2157-8117


Conference2012 IEEE International Symposium on Information Theory
Abbreviated titleISIT 2012
Country/TerritoryUnited States
CityCambridge, MA


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

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Modelling and Simulation
  • Applied Mathematics


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