Optimal transmit power allocation for MIMO two-way cognitive relay networks with multiple relays using AF strategy

Ahmad M. Alsharoa, Hakim Ghazzai, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

In this letter, we consider a multiple-input multiple-output two-way cognitive radio system under a spectrum sharing scenario, where primary and secondary users operate on the same frequency band. The secondary terminals aims to exchange different messages with each other using multiple relays where each relay employs an amplify-and-forward strategy. The main objective of our work is to maximize the secondary sum rate allowed to share the spectrum with the primary users by respecting a primary user tolerated interference threshold. In this context, we derive an analytical expression of the optimal power allocated to each antenna of the terminals. We then discuss the impact of some system parameters on the performance in the numerical result section. © 2012 IEEE.
Original languageEnglish (US)
Pages (from-to)30-33
Number of pages4
JournalIEEE Wireless Communications Letters
Volume3
Issue number1
DOIs
StatePublished - Feb 2014

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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