Jamming Simulation Analysis of LFM-Chebyshev Chaotic Bi-Phase Code Signal

Abstract

LFM-Chebyshev chaotic bi-phase code signal is a mixed signal which uses Chebyshev chaotic sequence as inter pulse two-phase coding and linear frequency modulation processing in the pulse. It has strong concealment and anti-jamming ability. In order to study the application value of LFM-Chebyshev chaotic bi-phase code signal in electronic countermeasures, based on the model and characteristics of LFM-Chebyshev chaotic bi-phase code signal, the jamming effects of five jamming styles, such as interval sampling and repeater jamming, convolution modulation jamming, frequency shift jamming, distance jamming and distance-frequency shift two-dimensional jamming, on LFM-Chebyshev chaotic bi-phasie code signal are simulated by MATLAB software. The characteristics and parameters set of the five jamming methods are analysed. Theoretical analysis and simulation results show that convolution modulation jamming is an ideal jamming mode for LFM-Chebyshev chaotic bi-phase code signal.

Keywords

• |lfm|chaotic bi-phase code|interval sampling, repeater jamming|convolution modulation jamming|electronic countermeasures|electronic warfare|radar