| 摘要: |
| 针对闭环多输入多输出(MIMO)预编码，分析了符号随机加密特性以及系统的安全容量，针对信道和预编码矩阵估计存在误差的情况，分析给出了窃听者接收信干噪比的上界。仿真分析表明，在同样信噪比下，安全容量随着收发天线数增加而增大，即使窃听者信噪比略好仍然具有无法窃听的安全容量。存在估计误差时，窃听者接收信干噪比降低，且预编码矩阵估计误差对其影响更严重。 |
| 关键词: MIMO系统 预编码矩阵估计误差 信道容量 安全容量 |
| DOI： |
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| 基金项目: |
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| Physical layer security performance of MIMO system |
| LIU Chunguo,LI Lizhong |
| () |
| Abstract: |
| For closed-loop multiple-input multiple-output(MIMO) precoding,the random symbol encryption and the secrecy capacity are analyzed. For receiver with channel and precoding matrix estimation error,an upper bound of eavesdropper signal-interference-noise ratio(SINR) is derived.Simulation results show that the secrecy capacity increases with the increase of the numbers of transmitting and receiving antennas,the eavesdropper couldn′t intercepte the information even if it has higher signal-to-noise ratio(SNR). The estimation error will lead to the decrease of eavesdropper SINR,and the influence of the precoding matrix estimation error is even worse. |
| Key words: MIMO system precoding matrix estimation error channel capacity secrecy capacity |
《电讯技术》编辑部 