Multi-pair cognitive two-way relaying and power allocation under imperfect CSI

Ubaidulla Pandarakkottilil, Mohamed-Slim Alouini, Sonia Aïssa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


In this paper, we present a robust joint relay precoder design and transceiver power allocation for a cognitive radio network under imperfect channel state information. The secondary (or cognitive) network consists of multiple pairs of single-antenna transceiver nodes and a non-regenerative two-way relay with multiple antennas which aids the intra-pair communication process of the transceiver nodes. The secondary nodes share the spectrum with a licensed primary user (PU) while guaranteeing that the interference to the PU receiver is maintained below a specified threshold. The proposed robust design is based on the minimization of the sum mean-square error (MSE) of the transceiver nodes under constraints on the secondary users' transmit powers and interference to PU the receiver. Though the original problem is non-convex, we show that the proposed design can be solved using alternating optimization of convex subproblems which have analytic or efficient numerical solutions. We illustrate the performance of the proposed designs through some selected numerical simulations. © 2013 IEEE.
Original languageEnglish (US)
Title of host publication2013 IEEE 77th Vehicular Technology Conference (VTC Spring)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)9781467363372
StatePublished - Jun 2013

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01


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