Secrecy for MISO broadcast channels via alternating CSIT
Secrecy for MISO broadcast channels via alternating CSIT
复制标题
通过交替 CSIT 对 MISO 广播频道保密
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
S. Ulukus
中科院分区：
文献类型：
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作者：
P. Mukherjee;R. Tandon;S. Ulukus
研究了具有保密消息的两用户多输入单输出（MISO）广播信道（BCCM），其中来自每个用户的发送端信道状态信息（CSIT）的性质可以是<sub>I1</sub>，i = 1，2，其中<sub>I1</sub>;<sub>I2</sub> ∈ {P;D;N}，P，D和N分别对应于理想瞬时、完全延迟和无CSIT.因此，整个CSIT可以随时间在对应于I<sub>1</sub> I<sub>2</sub>的所有可能值的9个可能状态之间交替，每个状态发生的时间为总持续时间的λ<sub>I 1 I 2</sub>部分。本文的主要贡献是建立了安全自由度（s.d.o.f.）具有交替CSIT的MISO BCCM区域，对称性假设λ<sub>I1 I2</sub> = λ<sub>I2 I1</sub>。结果突出了跨CSIT状态编码的协同效益的保密性和渠道知识及其对s.d.o.f.的影响的各个方面之间的相互作用。
The two-user multiple-input single-output (MISO) broadcast channel with confidential messages (BCCM) is studied in which the nature of channel state information at the transmitter (CSIT) from each user can be of the form I<sub>i</sub>, i = 1, 2 where I<sub>1</sub>; I<sub>2</sub> ∈ {P;D;N}, and the forms P, D and N correspond to perfect and instantaneous, completely delayed, and no CSIT, respectively. Thus, the overall CSIT can alternate over time between 9 possible states corresponding to all possible values of I<sub>1</sub>I<sub>2</sub>, with each state occurring for λ<sub>I1I2</sub> fraction of the total duration. The main contribution of this paper is to establish the secure degrees of freedom (s.d.o.f.) region of the MISO BCCM with alternating CSIT with the symmetry assumption λ<sub>I1I2</sub> = λ<sub>I2I1</sub> . The results highlight the synergistic benefits of coding across CSIT states for secrecy and the interplay between various aspects of channel knowledge and its impact on s.d.o.f.