Performance Evaluation of UWB Waveforms in High-Resolution Radar

Abstract

The radar waveform design evaluates the target detection, range, and velocity. The performance depends on its structure and resolution. In this paper, ultra-wideband waveform (UWB) design techniques are presented in two-dimensional and three-dimensional scenarios. The ambiguity function is a three-dimensional and two-variable mathematical tool, which demonstrates both range and Doppler resolution capabilities of the waveform. The ambiguity function and autocorrelation functions are used to evaluate the target parameters by studying their surfaces. This paper demonstrates the important results of two-dimensional and three-dimensional plots of non-sinusoidal chirp signals and Barker code of length five. The three-dimensional plots are generated for the above UWB coded signals, UWB chirp signal, and Barker code of length five, and the results are presented. In this paper, range resolution plots of the UWB waveforms are presented and discussed their results in the applications of high-resolution radar for testing detection capabilities. The ambiguity surfaces of the above signals are plotted to determine the range–velocity resolution. The ultra-wideband nonlinear frequency modulated waveform can simultaneously achieve high peak energies and shows high a range and Doppler resolution performance. The delay-Doppler ambiguity function of Barker code of length five using UWB pulses is derived, and their surfaces are examined.