A Novel Multiple LFMSignals Detection Method

摘要

The Wigner-Ville Distribution (WVD) Hough transform could effectively detect several Linear-Frequency Modulated (LFM) signals in low Signal-Noise Ratio (SNR) environment. However, when the energy of these LFM signals diverge greatly, it is quite difficult to detect all LFM signals with the WVD- Hough transform at the same time, because the platform of strong signals will cover weak signals. All LFM signals can be detected with the "CLEAN" technique, but this solution can lonely be achieved at the cost of a large increase in computational load In this paper, a signal detection method based on WVD and binary integration in Hough transform parameter space is proposed according to the WVD-Hough transform. Using this method, strong signals as well as the weak signals covered by the strong signals could be detected simultaneously. It means that this method has high practicable value. Simulation results verify the effectiveness of this method.