Probabilistic Constrained Power Allocation for MISO Wiretap Channel Based on Statistical CSI-E

Xiaojun SUN  Xiaojian LIU  Ming JIANG  Pengcheng ZHU  Chunming ZHAO  

IEICE TRANSACTIONS on Communications   Vol.E94-B    No.11    pp.3175-3178
Publication Date: 2011/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.3175
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
multiple-input single-output,  wiretap channels,  false secrecy probability,  power allocation scheme,  ergodic secrecy rate,  

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In this letter, we propose a power allocation scheme to optimize the ergodic secrecy rate of multiple-input single-output (MISO) fading wiretap channels with a probabilistic constraint, using the statistical channel state information (CSI) of the eavesdropper (CSI-E). The analytical expressions of the false secrecy probability are derived and used as constraints in the rate maximization problem. Moreover, we obtain a suboptimal solution by formulating the power allocation problem as a Rayleigh quotient problem.