Transmit Antenna Selection in Cognitive MIMO Relaying with Multiple Primary Transceivers

Phee Lep Yeoh, Maged Elkashlan, Kyeong Jin Kim, Trung Q. Duong, George K. Karagiannidis

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


We consider transmit antenna selection (TAS) in cognitive multiple-input multiple-output (MIMO) relay networks, as an interference-aware design for secondary users (SUs) to ensure power and interference constraints of multiple primary users (PUs). In doing so, we derive new exact and asymptotic expressions for the outage probability of TAS with maximal ratio combining (TAS/MRC) and with selection combining (TAS/SC) over Rayleigh fading. The proposed analysis and simulations highlight that TAS/MRC and TAS/SC with decode-and-forward relaying achieve the same diversity order in cognitive MIMO networks, which scales with the minimum number of antennas at the SUs. Furthermore, we accurately characterize the outage gap between TAS/MRC and TAS/SC relaying as a concise ratio of their array gains.
Original languageEnglish
Pages (from-to)483-489
Number of pages7
JournalIEEE Transactions on Vehicular Technology
Issue number1
Early online date15 Jan 2015
Publication statusPublished - Jan 2016


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