| 基于切换天线的类跳频方向调制物理层安全传输方法 |
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| 引用本文： | 郭彬,杨育红,唐燕群,辛刚,丁元.基于切换天线的类跳频方向调制物理层安全传输方法[J].信号处理,2016,32(9):1048-1054. |
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| 作者姓名： | 郭彬 杨育红 唐燕群 辛刚 丁元 |
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| 作者单位： | 国家数字交换网络工程技术研究中心 |
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| 基金项目： | 国家863计划项目资助课题（2015AA01A708） |
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| 摘 要： | 为了提高阵列天线通信的安全性，提出了一种具有跳频特征的类跳频方向调制物理层安全传输方法。发射机利用射频开关变速切换阵列天线，使非期望方向的信号随着时间的变化发生相位的周期变化进而表现出跳频特性，在不影响期望方向正常通信的条件下使窃听者更难截获通信信号。从载波相位改变的角度分析了通信信号在不同方位角的时频域特性，最后仿真了不同方位角信号时频谱图以及针对BPSK和2FSK两种通信信号窃听者的接收性能，结果表明类跳频方向调制是一种具有低截获特性的物理层安全通信方法。
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| 关 键 词： | 跳频 方向调制 射频开关 阵列天线 物理层安全 |
| 收稿时间： | 2016-01-27 |
A Similar Frequency Hopping Directional Modulation Method Based on Switched Antenna for Physical Layer Security |
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| Affiliation: | National Digital Switching System Engineering and Technological Research Center |
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| Abstract: | A frequency-hopping signal design method for directional modulation transmitter is proposed to enhance the wireless communication security of phased array antenna. By quickly switching antenna elements with a varying speed, frequency hopping signal can be produced in undesired directions due to period variation of the phase, while the carrier frequency of a pre-specified direction keeps constant, which makes it hard to eavesdropper to get the confidential symbol. The time-frequency spectrograph in different directions is analyzed and simulated together with the communication performance of BPSK and 2FSK signal. Simulation results show that the proposed method can provide a secure communication signal with low probability of detection. |
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