信息跳时架构下分层捷变低截获概率通信波形

Layered agile low probability of intercept communication waveforms based on an information time hopping architecture

针对周期信号抗破译性能较差及非周期聚敛性带来的误码性能下降的问题,本文提出一种时宽-信息跳时-调频率分层波形架构。通过构建信息跳时,掩护时宽随机化的模式,解决了误码性能变时宽下降问题,加强了波形的低截获概率特征。本文以数学推导和仿真分析的方法,探究了此分层波形架构下的误码性能、功率谱类噪声性能、二次谱域周期聚敛性及先验信息抗破译性。理论分析和仿真验证表明:时宽-信息跳时-调频率分层波形可以保证与定时宽信号相比,在不降低误码性能的条件下,降低了波形的周期聚敛性,从而提高了波形的截获概率性能。

Aiming at the problem of poor anti-decoding performance of periodic signals and the degradation of bit error rate(BER)performance caused by aperiodic convergence,a layered waveform architecture of time width-information time hopping-frequency modulation rate(TIF)is proposed in this paper.The problem of aperiodic degradation of BER performance is solved by constructing a randomized mode of information hopping and covering time width,enhancing feature of low probability of intercept(LPI).By means of mathematical derivation and simulation analysis,this paper explores the bit error performance,power spectrum noise performance,secondary spectral domain period convergence and anti-deciphering performance of prior information of this layered waveform architecture.Theoretical analysis and simulation results show that TIF layered waveform can reduce the periodic convergence of waveform and improve the LPI performance of waveform compared with timing wide signal without attenuation of bit error performance.