雷达嵌入式通信中抵抗多径衰落技术的研究

摘要

This issues are discussed that the radar embedded communication system uses the radio frequency tag to conceal the communication signal in the radar echo and implements the covert communication in the multipath fading channel. The concept of radar embedded communication system is described in detail, and signal waveform and receiver for this system are constructed. Meanwhile the advantages and disadvantages in using time reversal technique to resist multipath fading are analyzed and pointed out. The equalizer is introduced into the system, and the radar embedded communication receiving method based on equalization technology is proposed. The effect of equalizer in resisting multipath fading is simulated and analyzed. The simulation results indicate that the two techniques can improve the communication performance in the corresponding scene.%研究多径衰落信道下,雷达嵌入式通信系统利用射频标签将通信信号隐蔽在雷达回波中进行隐蔽通信的问题.详细介绍了雷达嵌入式通信系统的概念,构建了用于该系统的信号波形和接收机,分析并指出了利用时间反转技术抵抗多径衰落的优点与缺陷,并将均衡器引入该系统,提出了基于均衡技术的雷达嵌入式通信接收方法.仿真并分析均衡器抵抗多径衰落的效果,结果表明两种技术在相应场景下均能有效改善通信性能.