Parameter estimation of LFMCW signal using S-Method with adaptive window

Linear frequency modulated continuous wave (LFMCW) signal has been widely used in the new system radar as the progress of radar technology. It is difficult to estimate the parameters of the LFMCW signal under noncooperative circumstances. In this paper, we introduce the time frequency analysis methods to signal representation and parameter estimation. The S-Method with adaptive window is proposed to estimate the parameters of different LFMCW signals, including sawtooth and triangular LFMCW. The theoretical analysis and experiment results demonstrate the validity and correctness of the proposed algorithm, which can suppress the cross-term interferences and improve the estimation performance at different signal-to-noise ratios.