Anti-jamming Performance Evaluation of Linear Frequency-modulated Continuous Wave Fuze Based on Ambiguity Function Incision
Zhou Xin-gang · Acta Armamentarii · 2009
Based on the analysis of active jamming mechanism and ambiguity function,the methodology of ambiguity function incision evaluating the anti-active-jamming performance of linear frequency-modulated continuous wave(LFMCW) fuze was put forward.The area of the ambiguity function incision is computed at a certain height which is determined by the radio fuze principle and its receiver signal processing.The smaller the computed area becomes, the stronger the anti-jamming performance gets.This methodology was applied to the evaluation of the anti-jamming performance of linear frequency modulated continuous waveform ranging fuze.It demonstrates that the anti-jamming performance of saw-tooth frequency modulated continuous waveform ranging fuze is stronger than that of symmetrical frequency modulated continuous waveform ranging fuze,and the anti-jamming performance difference of them becomes smaller when the modulation bandwidth becomes wider;the effect of modulation time on LFMCW fuze is small.The computed results by an example show that the evaluation methodology is impersonal,reasonable and computable,which can be use for practical purposes.