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无人机主遥控数据链是战场地空通信的主要路径,其抗干扰性能直接影响无人机作战效能的发挥。连续波电磁辐照试验发现部分频点容易导致无人机主遥控数据链失锁,为进一步研究无人机电磁干扰耦合路径、分析作用机理,以某型无人机作为受试对象,利用注入法开展验证分析试验。试验和仿真结果表明:前门是无人机主遥控数据链受连续波干扰的重要耦合路径,双工器滤波衰减能力差导致干扰信号随有用信号进入内部工作电路。信噪比越小,BPSK调制信号频谱分量叠加的干扰成分越多,有用信号受到压制并被湮没在噪声中,因而解调输出的误码率也越大以致干扰正常通信,且由于双工器隔离度差导致下行遥测链路中断。
UAV master remote control data link is the main path of air-ground battlefield communications, its anti-jamming performance directly affects the operational effectiveness of UAV. Continuous electromagnetic radiation test found that some of the frequency points easily lead to the main chain of unmanned remote control data loss, in order to further study the UAV electromagnetic interference coupling path, analyze the mechanism of action to a type of UAV as the test object, the use of injection Law to carry out verification analysis test. The experimental and simulation results show that the front door is an important coupling path for the continuous remote control data link of the UAV. The poor attenuation of the duplexer results in the interference signal entering into the internal working circuit with the useful signal. The smaller the signal-to-noise ratio is, the more interference components are superimposed on the spectral components of the BPSK modulated signal, the useful signal is suppressed and annihilated in the noise, so the bit error rate of the demodulated output is also larger so as to interfere with the normal communication, Poor isolation leads to downlink telemetry link interruption.