Specific emitter features extraction based on bispectrum and Walsh transform
Guangxue Wang · Systems engineering and electronics · 2008
Aiming at the extraction and recognition of the radar emitters in complex electromagnetic condition.A novel idea is proposed that takes the bispectrum of emitters as the specific emitter feature and the Walsh transform as the optimized algorithm.Bispectrum includes lots of imperceptibility features of signals,such as the phase noise,the frequency excursion of emitters,the reduce gauss noise,and clutter echo's influence.But there are some redundancy information among them,which is invalid for recognizing emitters with computer.The paper uses Walsh transform to optimize the signal's bispectrum,and considers the result as the specific features of radar emitters.Simulation results show the feasibility of the method.