一种解决跳频通信系统EMC问题的新方法

摘要

为了解决跳频通信电台与其他用频设备同时同地使用出现的电磁兼容（EMC）问题，本文将自适应干扰对消技术应用到无线通信系统抗干扰中。首先对自适应对消算法进行了仿真和分析，得到了不同步长LMS算法的收敛曲线与抵消波形，提出了一种变步长LMS算法，并基于simulink中S函数对其进行了建模，验证了该模块的正确性；构建了跳频通信系统模型，得到了通信系统在梳状干扰情况下，LMS对消模块加入前后频谱和误码率的数值，证明了LMS对消模块在解决无线通信系统同址干扰的有效性。%To solve the EMC of communication radios when they are used in the same time and at the same place ;The adaptive cancellation will been applied to the frequency hooping communication.First of all,the adaptive cancellation algorithm is simulated and analyzed,then waveform of different fixed-step and variable-step LMS algorithm and cancellation is shown;A variable-step LMS is introduced and built via the s-function,confirming its validity;Then the model of frequency hopping is built,in the condition that there is comb jamming,getting the error rate and the frequency spectrum before and after applying the LMS adaptive cancellation module, confirming its effect in canceling the co-site interference of communication radios.