Energy-Efficient Precoder Design for MIMO Wiretap Channels

Energy-Efficient Precoder Design for MIMO Wiretap Channels
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MIMO 窃听通道的节能预编码器设计

DOI:
10.1109/lcomm.2014.2331273
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发表时间:
2014-07
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
lvxi yang
lvxi yang
中科院分区:
其他
文献类型:
--
作者:
haiyang Zhang;yongming Huang;shidang li;lvxi yang

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在这封信中,我们研究了能量有效的预编码器设计在三节点MIMO窃听信道。不同于以往的工作在这方面,主要集中在保密率最大化或功率最小化的问题,在这里,我们的目标是最大限度地提高系统的能量效率(EE)的秘密率和发射功率的约束,这是一个非凸优化和难以处理。首先将其转化为等价的参数化多项式减法形式,然后利用泰勒级数展开将非凸等价问题近似为凸优化问题。在此基础上,提出了一种迭代算法,并证明了该算法的收敛性,同时将该算法推广到信道状态信息不确定的情况。数值结果表明,该算法优于传统的设计方法的EE。
In this letter, we study energy-efficient precoder design in a three-node MIMO wiretap channel. Different from previous works in this area that mainly focus on secrecy rate maximization or power minimization problems, here, we aim to maximize the energy efficiency (EE) of the system subject to the secret rate and transmit power constraints, which is a nonconvex optimization and hard to tackle. To solve it, we first transform it into an equivalent parameterized polynomial subtractive form and then approximate the nonconvex equivalent problem into a convex optimization problem by means of Taylor series expansion. Based on that, an iterative algorithm with proved convergence is proposed, and this algorithm is also extended to an imperfect-channel-state-information case. Numerical results show that the proposed algorithm outperforms traditional design methods in terms of EE.
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期刊: 2013 IEEE International Conference on Acoustics, Speech and Signal Processing
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