宽带条件下的RFT高速目标检测算法仿真研究  

Simulation Research of RFT High-speed Target Detection Algorithm under Wideband Conditions

作　　者：刘一帆 徐朝阳 付林强 LIU Yifan;XU Zhaoyang;FU Linqiang(The Eighth Research Academy of CSSC,Yangzhou 225101,China)

机构地区：[1]中国船舶集团有限公司第八研究院,江苏扬州225101

出　　处：《舰船电子对抗》2025年第2期58-62,共5页Shipboard Electronic Countermeasure

摘　　要：在高速运动目标的检测中,信号在长时间累积中会在距离域和多普勒域引起跨距离单元走动和跨多普勒单元走动问题。“两跨”问题会严重影响积累增益,为解决此问题近些年已涌现出很多方法,但是已有研究大多针对的是窄带条件下的“停走”回波模型,没有考虑目标速度对回波的尺度伸缩影响,以此类研究中经典的拉东傅里叶变换(RFT)算法为基础提出了一种新的长时间相干积累方法,即宽带缩放的拉东傅里叶变换(WS-RFT)。深入研究了尺度效应对脉冲压缩性能的影响,分析了传统RFT变换的距离和速度偏移,并与WS-RFT算法的检测性能相比较。最后设计了仿真实验,证明了所提出的WS-RFT算法可以极大地提高宽带雷达对远距离、弱和高速度目标的检测性能。In the detection of high-speed moving targets,the signal accumulation over a long period of time will cause the problems that targets walk across the distance unit and walk across the Doppler unit in both the distance and Doppler domains.The“two-span”problem will seriously affect the accumulation gain,and many methods have been developed in recent years to solve this problem,but most of the existing studies have focused on the“stop-and-go”echo model under narrow-band conditions,and have not taken into account the effect of the target speed on the scale scaling of the echoes.Based on the classical Radon-Fourier transform(RFT)algorithm in these researches,a new long-time coherent accumulation method is proposed,that is the wideband scaled Radon-Fourier transform(WS-RFT).The influence of scaling effect on the pulse compression performance is deeply investigated,and the distance and velocity offsets of the traditional RFT are analyzed,and the detection performance is compared with that of WS-RFT algorithm.Finally,simulation experiments are designed to demonstrate that the proposed WS-RFT algorithm can greatly improve the performance of broadband radar testing long-range,weak and high-velocity targets.

关 键 词：宽带雷达 相参积累 尺度效应 拉东-傅里叶变换 宽带缩放的拉东-傅里叶变换 

分 类 号：TN957.51[电子电信—信号与信息处理]