摘要
在非合作通信对抗方实施短波3G-ALE信号的检测时,由于低信噪比、载频频偏等不利因素,传统方法检测性能不佳,提出一种基于Duffing混沌振子的多通道检测方法。首先利用公开的探测报头对截获信号滑动相关预处理,然后将相关运算信号通过不同角频率本振与相同内置参数混沌振子相结合的多路检测通道,以检测通道的振子输出状态发生变化作为信号检测与载频估计的依据。理论分析与仿真实验表明,该方法可有效提高3G-ALE信号检测性能,并且一定程度上降低了常规混沌检测方法的复杂度。
Aiming at the problem that traditional methods make poor detection performance when implementing detection for HF 3G-ALE signal due to low signal-to-noise ratio and carrier frequency offset, we propose a multichannel detection method for non-cooperative communication countermeasure based on Duffing chaotic oscillator. Firstly, we employ the public preamble to make sliding correlation preprocessing for the intercepted signal. Then, the correlation operational signal is put through multiple detection channels, which combine the local oscillators of different angular frequencies and chaotic oscillators with the same built-in parameters. The change of oscillator’s output state in the detection channels is taken as the basis of signal detection and carrier frequency estimation. Theoretical analysis and simulation experiment show that the proposed method effectively improves the detection performance for 3G-ALE signal, and reduces complexity of the conventional chaotic detection method to a certain extent.
作者
吴培培
张旻
史英春
WU Peipei;ZHANG Min;SHI Yingchun(Electronic Countermeasure Institute,National University of Defense Technology,Hefei 230037,China)
出处
《中国科学院大学学报（中英文）》
CSCD
北大核心
2019年第6期832-838,共7页
Journal of University of Chinese Academy of Sciences
