GSVD-Based Precoding in MIMO Systems With Integrated Services
GSVD-Based Precoding in MIMO Systems With Integrated Services
复制标题
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
中科院分区:
文献类型:
--
作者:
Mei Weidong;Chen Zhi;Fang Jun
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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