一种基于阵列信号处理的短波跳频信号检测方法

提出了一个适用于阵列天线的跳频信号检测模型。在该模型中,首先产生基于短时傅立叶变换的时频图,接着将跳频信号的各跳从时频图中分割出来,并用阵列信号处理中的到达方向(DOA)估计理论在频域中估计各跳的方向参数,最后通过空间聚类得到跳频信号的数目及各自的参数集。该模型具有计算量小、可检测变跳速跳频信号等优点。通过仿真实验验证了该模型的可行性和有效性。

A Method of Detection of HF FH Signals Based on Array Signal Processing

A model to detect frequency-hopping(FH) signals received by array antenna was proposed in the paper.The model operates as follows: firstly the model generates time-frequency spectrum based on STFT,then separates hops of FH signals from time-frequency spectrum,next estimates direction of these hops in frequency domain according to direction of arrival(DOA) estimation theory,lastly obtains the number of FH signals and their parameters via DOA clustering.The method is of little calculations and capable of detecting FH signals of variable hopping rates.Moreover computer simulations were done to validate the model.