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Outage Capacity Analysis for SIMO Cognitive Fading Channel in Spectrum Sharing Environment Jinlong WANG Yang YANG Qihui WU Xin LIU Publication IEICE TRANSACTIONS on Communications Vol.E94-B No.8 pp.2439-2442 Publication Date: 2011/08/01 Online ISSN: 1745-1345 DOI: 10.1587/transcom.E94.B.2439 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Terrestrial Wireless Communication/Broadcasting Technologies Keyword: cognitive radio, spectrum sharing, outage capacity, SIMO, power control, beamforming, Full Text: PDF(188.4KB)>>
Summary: In this letter, we focus on the spectrum sharing cognitive radio system, wherein a single-input multi-output cognitive fading channel is considered. Subject to the joint average interference constraint and peak interference constraint at the primary receiver, the outage capacity of the cognitive channel involving joint beamforming and power control is analyzed. We derive the optimal beamforming and power control strategy and deduce the closed-form expression for the outage capacity under Rayleigh fading model, the functional regions of two kinds of interference constraints are discussed as well. Furthermore, considering zero-outage transmission, we investigate the delay-limited capacity and introduce a new concept called the zero-outage average interference wall. Extensive simulations corroborate our theoretical results. | |||||
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