On the Secrecy Throughput Maximization for MISO Cognitive Radio Network in Slow Fading Channels

被引:102
|
作者
Wang, Chao
Wang, Hui-Ming [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China
基金
中国国家自然科学基金;
关键词
Cognitive radio; physical layer security; artificial noise; secrecy throughput; secrecy outage; power allocation; PHYSICAL-LAYER SECURITY; MIMO;
D O I
10.1109/TIFS.2014.2356339
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
This paper studies the secure multiple-antenna transmission in slow fading channels for the cognitive radio network, where a multiple-input, single-output, multieavesdropper (MISOME) primary network coexisting with a multiple-input single-output secondary user (SU) pair. The SU can get the transmission opportunity to achieve its own data traffic by providing the secrecy guarantee for the PU with artificial noise. Different from the existing works, which adopt the instantaneous secrecy rate as the performance metric, with only the statistical channel state information (CSI) of the eavesdroppers, we maximize the secrecy throughput of the PU by designing and optimizing the beamforming, rate parameters of the wiretap code adopted by the PU, and power allocation between the information signal and the artificial noise of the SU, subjected to the secrecy outage constraint at the PU and a throughput constraint at the SU. We propose two design strategies: 1) non-adaptive secure transmission strategy (NASTS) and 2) adaptive secure transmission strategy, which are based on the statistical and instantaneous CSIs of the primary and secondary links, respectively. For both strategies, the exact rate parameters can be optimized through numerical methods. Moreover, we derive an explicit approximation for the optimal rate parameters of the NASTS at high SNR regime. Numerical results are illustrated to show the efficiency of the proposed schemes.
引用
收藏
页码:1814 / 1827
页数:14
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