Recent Development in the Use of Time-Frequency Analysis for Radar-based Applications

Abstract

Time-frequency analysis is an evolution of mathematical ideas and concepts used in the analysis of time-varying spectra of signals in order to cater to various problems in different fields. One of such fields of interest is radar-related problems. This paper reviews the recent advancements made in this area with the aid of time-frequency (t-f) tools within the last year till date, it presents a good starting point for researchers interested in radar applications of t-f analysis. It investigates the nature of tools used, the problem(s) solved, advantages and limitations of method used where applicable. Illustrations of some basic concepts are also presented when necessary. The short time Fourier transform (STFT) and Wigner-Ville distribution (WVD) still remain the two main key time-frequency distributions that have undergone various modifications to mitigate radar-related problems. It is also seen that a considerable amount of most recent works deals with micro-Doppler identification and radar signals analysis