Precoder Design and Power Allocation for MIMO Cognitive Radio Two-Way Relaying Systems

Lokman Sboui, Hakim Ghazzai, Zouheir Rezki, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

In this paper, we study a multiple-antenna two-way relaying (TWR) cognitive radio (CR) system. A space alignment (SA) technique is adopted by the secondary users (SUs) to avoid interference with the primary users (PUs). We derive the optimal power allocation that maximizes the TWR achievable SU sum- rate while respecting the total power budget and the relay power constraints. We also analyze the case in which the relay is able to optimize its gain matrix structure to enhance the SU sum-rate. In the numerical results, we quantify the sum-rate gain of using the SA in the TWR CR and we show that the SU sum-rate is very limited when the relay power is low or the PU power and its resulting interference are high. In addition, we optimize the relay gain using an iterative algorithm and compare between different relay matrix structures.
Original languageEnglish (US)
Pages (from-to)1-1
Number of pages1
JournalIEEE Transactions on Communications
Volume64
Issue number10
DOIs
StatePublished - Aug 11 2016

Fingerprint

Dive into the research topics of 'Precoder Design and Power Allocation for MIMO Cognitive Radio Two-Way Relaying Systems'. Together they form a unique fingerprint.

Cite this