Stochastic precoding for MISO interference channels with channel mean feedback

Minhua Ding*, Q. T. Zhang

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

This work considers linear precoding strategies for multiple-input single-out (MISO) interference channels with channel mean feedback at transmitters, where the interference at each receiver is treated as additive noise. The challenge here is that previous precoder designs with perfect channel state information (CSI) at transmitters do not apply and new approaches are required. Based on the Laplace transform order, an altruistic non-equilibrium strategy, i.e., the stochastic zero forcing, is first proposed under practical assumptions, generalizing the traditional zero forcing which requires perfect CSI. Interestingly, the precoding matrices here are all rank-one beamformers as in the traditional zero forcing. The competitive use of the common physical media in MISO interference channels is also formulated as a strategic noncooperative game. In contrast to the perfect CSI case with a unique rank-one Nash equilibrium, with channel mean feedback, the Nash equilibria here are not necessarily rank-one in general. Nevertheless, when achieved by the rank-one beamforming, the equilibrium is unique and convenient for implementation. Accordingly, the condition for beamforming to achieve the equilibrium is derived. Comparisons of the above two strategies reveal no overall dominance of one over the other, thereby establishing stochastic zero forcing as an alternative to the Nash equilibrium designs.

Original languageEnglish
Article number6164085
Pages (from-to)1082-1090
Number of pages9
JournalIEEE Transactions on Communications
Volume60
Issue number4
DOIs
Publication statusPublished - Apr 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • Interference channels
  • Laplace transform order
  • multiple-input single-output (MISO)
  • Nash equilibrium
  • stochastic orders
  • stochastic zero forcing

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