Joint Cooperative Beamforming and Artificial Noise Design for Secrecy Sum Rate Maximization in Two-Way AF Relay Networks
Joint Cooperative Beamforming and Artificial Noise Design for Secrecy Sum Rate Maximization in Two-Way AF Relay Networks
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DOI：
10.1109/lcomm.2013.121713.132262
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发表时间：
2014-01
期刊：
影响因子：
--
通讯作者：
Meilu Lin;J. Ge;Ye Yang;Yan-cheng Ji
中科院分区：
文献类型：
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作者：
Meilu Lin;J. Ge;Ye Yang;Yan-cheng Ji
针对双向放大转发中继网络，提出了一种协同波束形成（CB）和人工噪声（AN）的联合设计方案，以提高数据交换的安全性。基于保密和速率最大化（SSRM）准则，由于目标函数的非凸性，在单个中继功率约束下的联合设计问题在数学上是困难的。利用半定松弛（SDR）技术和逐次凸逼近（SCA）算法，我们有效地开发了一个稳定点的原始SSRM设计问题。证明SDR总是紧的，并产生一个秩1的解决方案。仿真结果验证了我们提出的联合CB和AN设计在提高保密率方面的效率和优点。
In this letter, a joint design of cooperative beamforming (CB) and artificial noise (AN) is proposed for two-way amplify-and-forward (AF) relay networks to improve the security of the date exchange. Based on secrecy sum rate maximization (SSRM) criterion, such joint design problem under individual relay power constraints is mathematically hard due to the non-convex objective function. By utilizing the semidefinite relaxation (SDR) technique and successive convex approximation (SCA) algorithm, we efficiently develop a stationary point for the original SSRM design problem. Proof is also given to show that SDR is always tight and yields a rank-one solution. Simulations are presented to validate the efficiency and merits of our proposed joint CB and AN design in enhancing the secrecy sum rate.