A New Kind of FRFT Analysis Method for Multi-Component LFM Signals
To effectively detect and recognize multi-component Linear Frequency-Modulated (LFM) emitter signals, a multi-component LFM emitter signal analysis method based on the complex Independent Component Analysis(ICA) which was combined with the Fractional Fourier Transform(FRFT) was proposed. The idea which was adopted to this method was the time-domain separation and then time-frequency analysis, and in the low SNR cases, the problem which is generally plagued by noised of feature extraction of multi-component LFM signal based on FRFT is overcame. Compared to the traditional method of time-frequency analysis, the computer simulation results show that the proposed method for the multi-component LFM signal separation and feature extraction was better.
Helen Zhang, Gang Shen and David Jin
Q. Guo et al., "A New Kind of FRFT Analysis Method for Multi-Component LFM Signals", Advanced Materials Research, Vols. 204-210, pp. 973-978, 2011