Specific radar emitter recognition based on maximum-likelihood criterion
Yu Liu · Systems engineering and electronics · 2009
Based on the small differences between envelopes of the two specific signals,a new radar emitter recognition method is presented according to the maximum-likelihood criterion.Firstly,the received signal is filtered to reduce the noise out of the bandwidth and to enhance the signal-to-noise ratio.Consequently,the signal with additive band-limited white noise is transformed to baseband and is expanded in K-L(Karhunen-Loeve) series.Specific radar emitter recognition is performed by the equivalent decision variable inferred from the likelihood function.Computer simulation results show that the method is able to classify the two same model radar emitters by single pulse information with an accuracy rate of 94% when SNR is 0 dB and the correlation coefficient is 0.993 2.