Cognitive MIMO Relaying with Multiple Primary Transceivers

    •  Yeoh, P.L.; Elkashlan, M.; Kim, K.J.; Duong, T.Q.; Karagiannidis, G.K., "Cognitive MIMO Relaying with Multiple Primary Transceivers", IEEE Global Communications Conference (GLOBECOM), December 2013.
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      • @inproceedings{Yeoh2013dec,
      • author = {Yeoh, P.L. and Elkashlan, M. and Kim, K.J. and Duong, T.Q. and Karagiannidis, G.K.},
      • title = {Cognitive MIMO Relaying with Multiple Primary Transceivers},
      • booktitle = {IEEE Global Communications Conference (GLOBECOM)},
      • year = 2013,
      • month = dec,
      • url = {}
      • }
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We examine the impact of clusters of primary transceivers in cognitive multiple-input multiple-output (MIMO) relay networks with underlay spectrum sharing. In such a network, we propose antenna selection as an interference-aware design to satisfy the power constraints in the primary and secondary networks. To demonstrate this, we consider transmit antenna selection with maximal ratio combining (TAS/MRC) in the primary and secondary networks. With this in mind, we derive new closed-form asymptotic expressions for the outage probability and the symbol error rate (SER) over independent Nakagami-m fading channels. Our results lead to several new fundamental insights. In particular, we highlight that TAS/MRC achieves a full diversity gain when the maximum transmit power in the secondary network is proportional to the peak interference temperature in the primary network.