GSVD-Based Precoding in MIMO Systems With Integrated Services

GSVD-Based Precoding in MIMO Systems With Integrated Services
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具有集成服务的 MIMO 系统中基于 GSVD 的预编码

DOI:
10.1109/lsp.2016.2606349
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发表时间:
2016-09
影响因子:
3.9
通讯作者:
Fang Jun
Fang Jun
中科院分区:
工程技术2区
文献类型:
--
作者:
Mei Weidong;Chen Zhi;Fang Jun

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这封信考虑一个两个接收机多输入多输出高斯广播信道模型与综合服务。具体地说,我们将联合收割机两种服务消息组合起来,并同时为它们服务:一种是针对两个接收者的组播消息,另一种是只针对一个接收者的机密消息。机密信息对未经授权的接收者来说是绝对安全的。由于服务消息的耦合,寻求实现容量的发送协方差矩阵是困难的。因此,我们提出了一种基于广义奇异值分解(GSVD)的次优预编码方案。GSVD在发射机和接收机之间产生几个虚拟正交子信道。在满足组播服务质量约束的前提下,以保密率最大为目标,对组播消息和保密消息的子信道分配和功率分配进行联合优化。由于这个问题本身是复杂的,一个凹的差异算法,连同一个穷举搜索,被利用来处理功率分配和子信道分配,分别。数值结果来说明我们所提出的策略的有效性。
This letter considers a two-receiver multiple-input multiple-output Gaussian broadcast channel model with integrated services. Specifically, we combine two sorts of service messages, and serve them simultaneously: One multicast message intended for both receivers and one confidential message intended for only one receiver. The confidential message is kept perfectly secure from the unauthorized receiver. DueAN54-B6010-A001 to the coupling of service messages, it is intractable to seek capacity-achieving transmit covariance matrices. Accordingly, we propose a suboptimal precoding scheme based on the generalized singular value decomposition (GSVD). The GSVD produces several virtual orthogonal subchannels between the transmitter and the receivers. Subchannel allocation and power allocation between multicast message and confidential message are jointly optimized to maximize the secrecy rate in this letter, subject to the quality of multicast service constraints. Since this problem is inherently complex, a difference-of-concave algorithm, together with an exhaustive search, is exploited to handle the power allocation and subchannel allocation, respectively. Numerical results are presented to illustrate the efficacy of our proposed strategies.
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