A Method of Detection of HF FH Signals Based on Array Signal Processing
Keren Wang · Communication Countermeasures · 2007
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.