Physical layer security in multi-cell MISO downlinks with incomplete CSI - A unified secrecy performance analysis

Xiaoming Chen, Hsiao Hwa Chen

研究成果: Article同行評審

32 引文 斯高帕斯(Scopus)

摘要

In this paper, we consider a multi-cell MISO downlink, where a multi-antenna base station (BS) sends messages to its intended user, while a passive eavesdropper tries to intercept the information in each cell. Physical layer security is employed in order to guarantee information security. Due to incomplete channel state information (CSI) at BSs, residue inter-cell interference exists even with coordinated beamforming, which exerts a great impact on the secrecy performance. In this paper, we conduct a unified performance analysis for physical layer security with incomplete CSI, and derives closed-form expressions of ergodic secrecy rate, secrecy outage probability, and interception probability, considering CSI estimation accuracy, transmit signal to noise ratio (SNR), and channel condition. We reveal some insights on the secrecy performance through asymptotic analysis. Furthermore, based on the derived theoretical results, we propose a CSI exchange amount allocation scheme. Finally, the simulations validate our theoretical claims.

原文English
文章編號6920086
頁(從 - 到)6286-6297
頁數12
期刊IEEE Transactions on Signal Processing
62
發行號23
DOIs
出版狀態Published - 2014 十二月 1

All Science Journal Classification (ASJC) codes

  • 訊號處理
  • 電氣與電子工程

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