A New Method for Parameter Estimation of Cross-Channel Ultra-Wideband LFM Signal

Abstract

Abstract Aiming at the reconnaissance of ultra-widaband (UWB) LFM signal, a method using dual-channel joint working mode is introduced and a parameter estimation algorithm of cross-channel signal is proposed in this paper. Short time Fourier transform (STFT) is carried out to extract time-frequency curve firstly. Then least-square (LS) algorithm is used to roughly estimate the parameters of signal in single channel and whether it is a cross-channel signal is determined. Finally, random sample consensus (RANSAC) iteration is applied to construct the model of the chirp line and obtain the accurate parameters. Simulation results confirmed the effectiveness of the proposed method.