动态频谱抗干扰系统中动态宽间隔跳频序列研究

Research of Dynamic Wide-gap Frequency Hopping Sequences in Dynamic Spectrum Anti-jamming System

现有的跳频序列大多由于统计性能不佳,通信参数难以实时改变,无法直接应用于动态频谱抗干扰系统。为此,提出一种适用于动态频谱抗干扰系统的跳频序列。基于m序列,通过非连续抽头模型产生跳频基序列。依据随机平移替代法的思想,对基序列进行伪随机映射,给出一种频率数、跳频间隔可根据通信环境实时变化的动态宽间隔跳频序列构造方法。仿真结果表明,与基于固定参数的频率自适应跳频序列相比,动态宽间隔跳频序列在均匀性、随机性、汉明相关性、平均跳频间隔等方面均具有更好的性能。

The existing Frequency Hopping（FH） sequence can not be directly applied to a dynamic spectrum anti-interference system due to poor statistical performance and difficulty in real-time changes of communication parameters.Therefore,a FH sequence suitable for dynamic spectrum anti-jamming system is proposed.Based on m sequence,a hopping base sequence is generated by discontinuous model.According to the idea of stochastic translational substitution,a pseudo-random mapping of base sequences is proposed,and a dynamic wide interval frequency hopping sequence congtruction method with frequency number and FH interval is qiven according to the changed communication environment.Simulation results show that the dynamic wide-gap hopping sequence has better performance in terms of uniformity,randomness,Hamming correlation,average hopping gap and so on,compared with the frequency-adaptive FH sequence based on fixed parameters.