Time-delay Estimation Using The Wigner Distribution

A new approach is proposed and investigated for the high resolution estimation and tracking of non-stationary time delay between frequency modulated signals. The method, based on cross-correlation of the pseudo-Wigner Distributions of the noise-contaminated f.m. signals exploits the tirne-varyingo instantaneous fre- quency characteristic of such signals. The time-delay estimation algorithrn is presented together with simulation results that show the performance of the technique in the estimation of tirrie-varying delay.