多音干扰下Nakagami-m信道传输Link16数据链的性能分析

Link16数据链的应用综合广泛，由于运用了跳扩频和编码技术使其具有强大的抗干扰能力。为了探究Link16数据链在衰落信道下的响应，在加性高斯白噪信道的基础之上，研究了Link16数据链经过Nakagami-m衰落信道的系统性能。着重推导了Link16数据链单脉冲结构在多音干扰下经过Nakagami-m衰落信道的误码率(bit error rate, BER)表达式，并给出了双脉冲结构BER公式。仿真实验结果验证了Link16数据链单脉冲结构在多音干扰下经过Nakagami-m衰落信道的BER公式的准确性，分析了多径参数对Link16数据链抗干扰性能的影响，得出增加衰落参数m和可分辨路径可以提升Link16数据链的系统性能，且当信干比一定、被干扰频点个数在25个及以上时系统BER达到10^-1。

Performance analysis of Nakagami-m channel transmission Link16 under multi-tone interference

Link16 data link has a wide range of applications. Because of the application of spread spectrum hopping and coding technology, it has a strong anti-interference ability. In order to explore the response of Link16 data link in fading channel, based on additive white Gaussian noise channel, the system performance of Link16 data link through Nakagami-m fading channel is studied. The bit error rate (BER) expression of Link16 data link monopulse structure passing through Nakagami-m fading channel under multi-tone interference is derived, and the BER formula of double pulse structure is given. Simulation results verify the accuracy of BER formula of Link16 data link monpulse structure passing through Nakagami-m fading channel under multi-tone interference, analyze the influence of multi-path parameters on the anti-jamming performance of Link16 data link, and conclude that adding fading parameter m and discernible path can improve the system performance of Link16 data link. And when the signal-to-jamming ratio is constant and the number of interfered frequency points is 25 or more, the BER of the system reaches 10^-1.