Performance analysis and side lobe suppression in radon-Fourier transform based on random pulse repetition interval
Qian Chen1,2, Junhao Liu2, Chaowei Fu2, Haitao Wang2
1School of Information and Electronics, Beijing Institute of Technology, Beijing, 100081, China
2Shanghai Radio Equipment Research Institute, Shanghai, 200090, China
In order to solve the Blind Speed Side Lobe (BSSL) appeared in Radon-Fourier Transform (RFT) method used for dim target detection, a novel method of BSSL suppression is proposed in this paper. It is based on Random Pulse Repetition Interval (RPRI). The process of RPRI-RFT and the BSSL properties are described, the performance of coherent integration and the modulation noise of RFT algorithm based on RPRI are analysed in detail. Both the theoretical analysis and the numerical experimental results show that RPRI-RFT can be used to improve signal-to-noise ratio (SNR) and suppress BSSL effectively, and the influence of modulation noise of RPRI can be suppressed by the long-time integration characteristic, thus significantly improve the ability of low pulse repetition frequency radar to detect and measure long-range weak high-speed multi-targets.