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

doi:10.1109/WCL.2013.102613.130604

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 journal › Article › peer-review

32 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 language	English (US)
Pages (from-to)	30-33
Number of pages	4
Journal	IEEE Wireless Communications Letters
Volume	3
Issue number	1
DOIs	https://doi.org/10.1109/WCL.2013.102613.130604
State	Published - Feb 2014

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01

ASJC Scopus subject areas

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

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AB - 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.

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

Abstract

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