High-Precision Ranging Algorithm of FMCW Radar Optimized by Golden Section Method

Based on the research on frequency modulated continuous wave (FMCW) radar, this paper aims to estimate the frequency of the signal after FFT transformation by combining the golden section method with the Rife algorithm in engineering applications, in order to solve the problem that the frequency estimation error of the Rife algorithm is large under low signal-to-noise ratio (SNR). The algorithm uses the frequency estimated by the Rife algorithm as the search center of the golden section method for iterative search, thereby approaching the true frequency more accurately.