A Coherent Integration Method Based on Radon Non-uniform FRFT for Random Pulse Repetition Interval (RPRI) Radar
For radar signal processing, the method improves moving target detection under low SNR conditions, but the improvement is incremental over existing techniques.
The paper proposes a coherent integration method using Radon non-uniform FRFT to address range cell migration and spectrum spread in random pulse repetition interval radar, demonstrating superior detection performance in low SNR scenarios compared to MTD, RFT, and RFRFT.
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.