基于随机脉冲重复间隔Radon-Fourier变换的相参积累

针对远程隐身目标微弱回波的低信噪比检测和多普勒模糊下的参数测量问题，该文采用随机脉冲重复间隔Radon-Fourier变换(RPRI-RFT)实现回波脉冲的长时间相参积累和盲速旁瓣(BSSL)抑制。通过分析PRI随机抖动量与多普勒模糊旁瓣均值、随机调制噪声谱方差的定量关系，表明增加积累脉冲数量可以降低调制噪声的影响，并针对脉冲数增加导致的回波跨距离单元的问题，提出RPRI-RFT实现回波脉冲的有效相参积累。理论分析和仿真结果表明，RPRI-RFT能够降低随机调制噪声，同时可以抑制盲速旁瓣，从而有效提高低重复频率雷达对远程、微弱高速多目标的检测和测量能力。

Coherent Integration Based on Random Pulse Repetition Interval Radon-Fourier Transform

The Random Pulse Repetition Interval Radon-Fourier Transform (RPRI-RFT) is proposed for long-time echo pulses coherent integration and Blind Speed Side Lobe (BSSL) suppression, which makes it a good resolution for low SNR target detection and parameters estimation under Doppler ambiguity of long-range stealth targets. By analyzing the quantitative relation between the random jitter of PRI with the mean of Doppler ambiguity side lobes and the variance of random noise spectrum modulation, it is cleared that increasing the number of pulses can reduce the effect of modulation noise. Furthermore, for the problem of cross range unit migration leaded by increasing pulses, RPRI-RFT is an effective method to achieve echo pulses coherent integration. Both theoretical analysis and simulation results show that RPRI-RFT can be used to reduce random noise while suppressing blind speed side lobes, thus significantly improving the detection and measurement ability of low pulse repetition frequency radar with long-range weak high-speed multi-targets.