Radar detection and speed estimation of high-speed targets using phase-modulated waveforms.

Specifying parameters of high-speed targets as range and velocity in radar systems operating with phase-modulated signals is a problematic process because of the serious effect of high Doppler frequency on these types of waveforms. In the existence of a high-speed target, its Doppler frequency will be very high such that it totally changes the phase sequence of the received signal. As a result, the matched filter output will be distorted. Therefore, estimating target parameters will be impossible. In this letter, a new method is proposed for detecting and estimating velocity of high speed targets using phase-modulated signals. The suggested technique methodology depends on compensating the target high-Doppler frequency for signal recovery using a customized waveform shape. Moreover, the Doppler frequency value is estimated without ambiguity from one pulse, and without the need for a range-Doppler module. As such, the implementation of the proposed method is simple and inexpensive. The performance evaluation of the new method shows its superiority in compensation and estimation compared to other techniques when examined under higher Doppler frequency and noise compared to the conventional radar. [ABSTRACT FROM AUTHOR]