Power allocation for balancing the effects of channel estimation error and pilot overhead in full-duplex decode-and-forward relaying

Mikko Vehkapera, Taneli Riihonen, Risto Wichman, Baosheng Xu

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

This paper considers the transmit power balancing trade-off between the pilot and data signals in a two-hop full-duplex decode-and-forward relay link when the feedforward data channels are Rayleigh-fading and the residual feedback self-interference channel follows Rician-fading. The study concentrates on time-multiplexed orthogonal pilot sequences since simultaneously transmitted orthogonal pilots are disadvantageous for full-duplex relaying with self-interference. Average end-to-end achievable rate bounds are formulated first. Then the power allocation problem that can be solved only numerically in the general case is characterized. Finally, a simple suboptimal algorithm for power allocation is proposed. The numerical results illustrate that the proposed simple algorithm provides near optimal performance over a wide range of scenarios. The benefit of optimizing the power allocation is apparent across the range of values considered and it improves the achievable rate up to one bit per channel use compared to naive allocation schemes.

Original languageEnglish
Title of host publicationSPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications
PublisherIEEE
Number of pages5
Volume2016-August
ISBN (Electronic)9781509017492
DOIs
Publication statusPublished - 9 Aug 2016
MoE publication typeA4 Article in a conference publication
EventIEEE International Workshop on Signal Processing Advances in Wireless Communications - Edinburgh, United Kingdom
Duration: 3 Jul 20166 Jul 2016
Conference number: 17

Publication series

NameIEEE International Workshop on Signal Processing Advances in Wireless Communications
ISSN (Electronic)2325-3789

Workshop

WorkshopIEEE International Workshop on Signal Processing Advances in Wireless Communications
Abbreviated titleSPAWC
Country/TerritoryUnited Kingdom
CityEdinburgh
Period03/07/201606/07/2016

Keywords

  • Achievable rates
  • channel estimation
  • in-band full-duplex wireless
  • performance analysis
  • regenerative relaying
  • self-interference
  • transmit power optimization

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