A Coherent Integration Method Based on Radon Non-uniform FRFT for Random Pulse Repetition Interval (RPRI) Radar

TL;DR

This paper introduces a novel coherent integration technique using Radon non-uniform FRFT to effectively detect moving targets in RPRI radar, addressing RCM and spectrum spread issues.

Contribution

The paper presents a new integration method combining Radon NUFRFT for RPRI radar, improving target detection under low SNR and motion-induced distortions.

Findings

Effective RCM elimination via motion parameter search

Spectrum spread resolution using NUFRFT

Superior detection performance in low SNR scenarios

Abstract

To solve the range cell migration (RCM) and spectrum spread during the integration time induced by the motion of a target, this paper proposes a new coherent integration method based on Radon non-uniform FRFT (NUFRFT) for random pulse repetition interval (RPRI) radar. In this method, RCM is eliminated via searching in the motion parameters space and the spectrum spread is resolved by using NUFRFT. Comparisons with other popular methods, moving target detection (MTD), Radon-Fourier transform (RFT), and Radon-Fractional Fourier Transform (RFRFT) are performed. The simulation results demonstrate that the proposed method can detect the moving target even in low SNR scenario and is superior to the other two methods.