On the Secrecy Throughput Maximization for MISO Cognitive Radio Network in Slow Fading Channels
On the Secrecy Throughput Maximization for MISO Cognitive Radio Network in Slow Fading Channels
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DOI：
10.1109/tifs.2014.2356339
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发表时间：
2014-11-01
影响因子：
6.8
通讯作者：
Wang, Hui-Ming
中科院分区：
文献类型：
--
作者：
Wang, Chao;Wang, Hui-Ming
本文研究了认知无线电网络中慢褪色通道中的安全多 - 安特纳传输，其中多输入，单输出，多动螺旋体（Misome）主要网络与多输入单输出次要用户（SU）对共存。 SU可以通过为PU提供人造噪声提供保密保证，从而获得传输机会来实现自己的数据流量。与现有的作品不同，现有作品采用瞬时保密率作为性能指标，只有窃听者的统计渠道状态信息（CSI），我们通过设计和优化波束成形的速率参数来最大化PU的保密吞吐量PU采用的窃听代码以及SU的信息信号和人造噪声之间的功率分配，在PU处受到秘密中断约束的限制，并在SU处受到吞吐量的约束。我们提出了两种设计策略：1）非自适应安全传输策略（NASTS）和2）自适应安全传输策略，这些策略分别基于主要和次要链接的统计和瞬时CSIS。对于这两种策略，可以通过数值方法优化确切的速率参数。此外，我们在高SNR策略下的最佳速率参数得出了明确的近似。说明了数值结果以显示所提出的方案的效率。
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.