| 摘要: |
| 当MISO(Multi Input Single Output)系统存在的加性人工噪声服从一般分布时，系统保密容量讨论难度较大。为推导一般意义多天线系统下的保密容量，引入了信道等效特征的概念。利用信道特征阐明了人工噪声方法的物理概念，并推导出了具有普适性的人工噪声方法保密容量上下限，进一步结合熵功率，推导出AWGN信道下的保密容量解析式。理论分析和仿真得出，通过人工噪声可使平均保密容量增大，从而提高MISO系统的安全性。 |
| 关键词: MISO系统 保密容量 物理层安全 人工噪声 |
| DOI： |
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| 基金项目:河南省科技厅科技攻关项目(122102210142) |
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| Secrecy capacity analysis of general MISO system with artificial noise |
| DUAN Ming-yi,HUANG Ji-hai,JI Jiang |
| () |
| Abstract: |
| When the artificial noise in multi-input single-output(MISO) follows general distribution, the security capacity is hard to be calculated. To deduce the secrecy capacity of general multi-antenna system, this paper presents an equivalent channel characteristic model. This model is used to describe intrinsically how the artificial noise method makes the wireless communication more safe. And the upper/lower limit of secrecy capacity is deduced. Then, with the entropy power,the analytic expression of secrecy capacity in AWGN channel is deduced. The theoretic and simulation analysis show that in a power limited system, the artificial methods can increase the average secrecy capacity and improve the security of MISO system. |
| Key words: MISO system secrecy capacity physical layer security artificial noise |
《电讯技术》编辑部 