LPI Radar Signal Detection Based on Polyphase Filter and High-Order Cumulant
Jia Xin-hai · Electronic Information Warfare Technology · 2012
For the problem that the low probability of intercept(LPI) radar signal is difficult to be intercepted by the current electronic reconnaissance systems,a novel detection method of LPI radar signal based on the polyphase filter banks and high-order cumulants is proposed.The input signal is split into many narrow frequency bands by polyphase filter banks rapidly,and Gaussian noises can be suppressed using the short-time estimation of the third-order cumulant on each narrow frequency bands.Detector is designed to detect the LPI radar signal.Finally simulation results illustrate that the performance of new methods is better than energy detector and have high detection probability when SNR is more than-20dB.