Generalized Selection Combining in Cognitive MIMO Relay Networks

Yansha Deng, Maged Elkashlan, Phee Lep Yeoh, Trung Q. Duong, Ranjan K. Mallik

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

3 Citations (Scopus)


We propose transmit antenna selection with receive generalized selection combining (TAS/GSC) in dual-hop cognitive decode-and-forward (DF) relay networks for reliability enhancement and interference relaxation. In this paradigm, a single antenna which maximizes the receive signal-to-noise ratio (SNR) is selected at the secondary transmitter and a subset of receive antennas with the highest SNRs are combined at the secondary receiver. To demonstrate the impact of multiple primary users on the cognitive relay network, we derive new closed-form expressions for the exact and asymptotic outage probability with TAS/GSC in the secondary network. Several important design insights are reached. We corroborate that the full diversity gain is achieved, which is entirely determined by the total number of antennas in the secondary network. The negative impact of the primary network on the secondary network is reflected in the SNR gain.
Original languageEnglish
Title of host publicationCommunications (ICC), 2014 IEEE International Conference on
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Print)9781479920037
Publication statusPublished - 2014

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