A Time-Frequency-Domain Method of TDOA Estimation for Passive Radar Localization

A time-frequency-domain method of TDOA estimation is proposed in this paper. Time-domain correlation and frequency-domain estimation are used together to improve the accuracy of estimation. In this method, a new strategy consists of time shifting, slicing and least squares approximation is applied to eliminate the limitation of radar sampling frequency. A Monte Carlo simulation is conducted to evaluate the performance of this method. Additionally, the typical radar signal of AN/SPY-1 is chosen to be testing signal. The result indicates that the time-frequency-domain method could obtain 71 % performance improvements. In addition, it proves to be an effective solution to TDOA estimation for passive radar localization.