机载火控雷达空时离散捷变波形设计技术研究  

Space-time discrete agile waveform design for airborne fire control radar

作　　者：程远 莫修辞 顾铭 汤俊[2] CHENG Yuan;MO Xiuci;GU Ming;TANG Jun(AVIC Leihua Electronic Technology Institute,Wuxi 214082,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国航空工业集团公司雷华电子技术研究所,无锡214082 [2]清华大学电子工程系,北京100084

出　　处：《空间电子技术》2025年第2期86-99,共14页Space Electronic Technology

基　　金：江苏省卓越博士后基金项目(编号:2023ZB779)。

摘　　要：近年来,随着电子设备能力的迅速提升,给机载火控雷达带来了更为紧迫的抗干扰和低截获能力需求,雷达波形设计也需要进一步发展。传统的狭义波形通常只包含时域、频域、相位域维度的调制,抗干扰和低截获能力相对较差。文章提出一种新的空时离散波形,扩展雷达波形在空域扫描和驻留方式的维度,赋予雷达波形设计更高的自由度。针对空时离散波形设计与处理问题,建立空时离散扫描模型,提出一种基于脉冲抽取的栅瓣对消方法;基于抖动参数和组间间隔建立离散扫描波形优化模型,通过波形参数优化降低多普勒信号旁瓣。仿真结果表明,空时离散波形相较于传统序贯扫描波形具有更少的空域扫描驻留时间,提出的波形优化算法能够提升主旁瓣比15 dB以上,实现机载火控雷达更好的抗干扰和低截获性能。Recently,with the rapid development of electronic device capabilities,the airborne fire control radar faced more urgent challenges in anti-jamming and low probability of intercept requirements.Radar waveform design also requires further development.Traditional radar waveform usually contains modulation in the time,frequency and phase domain dimensions,with relatively poor anti-jamming and low probability of intercept capabilities.This paper proposed a new space-time discrete waveform,which extends the dimensions of radar waveform in spatial scanning and dwell modes.That provided higher degrees of freedom for airborne fire control radar waveform.For the design and processing of space-time discrete waveforms,a space-time discrete scanning mode is established,and a gate lode lobe cancellation method based on pulse extraction is proposed.A discrete scanning waveform optimization model is established based on jitter parameters and inter-group intervals to reduce the sidelobe of doppler signals by waveform parameter optimization.The simulation results indicate that the space-time discrete waveform has less spatial scanning dwell time compared with the traditional sequential scanning waveform.The proposed waveform optimization algorithm can improve the peak sidelobe ratio by more than 15dB,achieving better anti-jamming and low probability intercept performance of airborne fire control radar.

关 键 词：机载火控雷达 波形优化 空时离散 波形设计 

分 类 号：V443[航空宇航科学与技术—飞行器设计]