Simulation of Quasi-Random Frequency Hopping Signal Detection under Multiple Fixed-Frequency Interference
The complexity of the multi-fixed frequency interference will affect the random frequency hopping sig-nal,resulting in inaccurate detection.In order to improve the detection performance,a method of detecting quasi-ran-dom frequency hopping signals under multi-fixed frequency interference was proposed.At first,quasi-random fre-quency hopping signals under multiple fixed frequency interference were analyzed to obtain the frequency hopping sig-nals,and then the signals were denoised by wavelet threshold.Based on the denoising results,Fourier transform was performed on the signal.Secondly,the local adaptive threshold of the signal was solved to eliminate the fixed frequen-cy interference and thus to complete the frequency hopping signal extraction.Moreover,the continuity of the extracted signal in the time domain was detected.Furthermore,the frequency hopping signal and the suspicious target signal were differentiated.Finally,the detection of the quasi-random frequency hopping signal under the multi-fixed fre-quency interference was completed.Experimental results show that the detection effect of the proposed method is good by testing the signal-to-noise ratio and the detection error,indicating that it is practical and effective.
Multiple fixed-frequency interferenceQuasi-random frequency hopping signalWavelet threshold de-noisingFourier transformFrequency hopping signal detection
NETL
NSTL
万方数据
维普
