Multiple-Input Multiple-Output Gaussian Broadcast Channels With Confidential Messages

被引：146
作者：
Liu, Ruoheng [1 ]
Liu, Tie [2 ]
Poor, H. Vincent [3 ]
Shamai , Shlomo [4 ]
机构：
[1] Alcatel Lucent, Murray Hill, NJ 07974 USA
[2] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA
[3] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
[4] Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel
来源：
IEEE TRANSACTIONS ON INFORMATION THEORY | 2010年 / 56卷 / 09期
基金：
美国国家科学基金会; 以色列科学基金会;
关键词：
Artificial noise; broadcast channel; channel enhancement; information-theoretic security; multiple-input multiple-output (MIMO) communications; wiretap channel; SECRECY CAPACITY; REGION;
D O I：
10.1109/TIT.2010.2054593
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper considers the problem of secret communication over a two-receiver multiple-input multiple-output (MIMO) Gaussian broadcast channel. The transmitter has two independent messages, each of which is intended for one of the receivers but needs to be kept asymptotically perfectly secret from the other. It is shown that, surprisingly, under a matrix power constraint, both messages can be simultaneously transmitted at their respective maximal secrecy rates. To prove this result, the MIMO Gaussian wiretap channel is revisited and a new characterization of its secrecy capacity is provided via a new coding scheme that uses artificial noise (an additive prefix channel) and random binning.
引用
收藏
页码：4215 / 4227
页数：13
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