基于实时计算的雷达波形发生器
|
摘要
面对复杂的战场环境,低截获雷达需要发射复杂雷达波形,以防止被敌方截获。传统的雷达波形发生器多采用专用DDS芯片实现,工作频率低且方式不够灵活,无法满足日益增长的波形多样性需求。为解决该问题,提出通用高速DA加FPGA的波形发生器架构。分析了几类常用低截获波形的特性并给出实现方法,采用FPGA实时计算波形参数的方式,可产生线性调频信号、巴克码等雷达波形。经仿真和试验验证其满足使用要求。
In complex battlefield environment,it is necessary for low probability intercept(LPI) radar to launch the complex radar waveforms to prevent the information intercept implemented by enemy. The special direct digital synthesis(DDS) chip is usually used in the traditional radar waveform generators,which has low working frequency and inflexible working mode,and can′t meet the increasing requirements of waveform diversity. Therefore,a waveform generator architecture based on general high - speed DA and FPGA is proposed. The characteristics of several kinds of LPI waveforms are analyzed, and the implementation method is given. The mode of using FPGA to compute the waveform parameters in real time is adopted to generate the linear frequency modulation signal,Barker code waveform and other waveforms of radar. The simulation and test results demonstrate that the method can satisfy the use requirement.
In complex battlefield environment,it is necessary for low probability intercept(LPI) radar to launch the complex radar waveforms to prevent the information intercept implemented by enemy. The special direct digital synthesis(DDS) chip is usually used in the traditional radar waveform generators,which has low working frequency and inflexible working mode,and can′t meet the increasing requirements of waveform diversity. Therefore,a waveform generator architecture based on general high - speed DA and FPGA is proposed. The characteristics of several kinds of LPI waveforms are analyzed, and the implementation method is given. The mode of using FPGA to compute the waveform parameters in real time is adopted to generate the linear frequency modulation signal,Barker code waveform and other waveforms of radar. The simulation and test results demonstrate that the method can satisfy the use requirement.
引文
[1]潘启勇,张静亚,王宜怀.DRFM硬件平台的研究与实现[J].现代电子技术,2016,39(21):99-102.PAN Qiyong,ZHANG Jingya,WANG Yihuai. Research and implementation of hardware platform for DRFM[J]. Modern electronics technique,2016,39(21):99-102.
[2]李尚生,付哲泉,张军,等.相参雷达典型干扰信号产生及关键技术[J].海军航空工程学院学报,2015,30(4):345-348.LI Shangsheng,FU Zhequan,ZHANG Jun,et al. Typical in-terfering signal and key technology of coherent radar[J]. Jour-nal of Naval Aeronautical & Astronautical University,2015,30(4):345-348.
[3]宫新玉,张友益.几种常用AESA多功能雷达低截获概率波形的仿真设计[J].舰船电子对抗,2016,39(6):5-12.GONG Xinyu,ZHANG Youyi. Simulation and design of LPI waveform of several common multi-function AESA radar[J].Shipboard electronic countermeasure,2016,39(6):5-12.
[4]韩阳阳,苏五星,卢小勇,等.低截获概率抗干扰研究[J].舰船电子对抗,2013,36(3):22-26.HAN Yangyang,SU Wuxing,LU Xiaoyong,et al. Research into the anti-jamming of LPI technology[J]. Shipboard electro-nic countermeasure,2013,36(3):22-26.
[5]樊世杰,蔡飞,范红旗,等.基于AD9910的调频非线性步进信号生成方案[J].雷达科学与技术,2011,9(1):77-83.FAN Shijie,CAI Fei,FAN Hongqi,et al. Scheme for nonli-near stepped-frequency chirp signal generation based on AD9910[J]. Radar science and technology,2011,9(1):77-83.
[6]吴志毅,罗凌.基于AD9914宽带线性调频源的设计及实现[J].电子技术应用,2015,41(10):30-33.WU Zhiyi,LUO Ling. Design and realization of a broadband microwave frequency source[J]. Application on electronic tech-nique,2015,41(10):30-33.
[7] SHENG Mengmeng,LIU Haibo,WANG Junfu,et al. Direct digital generation of ultra-wideband LFM signal and its compen-sation technology[C]//2013 IET International Radar Confe-rence. Xi’an,China:IEEE,2013:1-5.
[8]周超,王跃科,乔纯捷,等.高动态GNSS信号多普勒模拟任意阶直接数字合成器设计[J].国防科技大学学报,2016,38(3):7-11.ZHOU Chao,WANG Yueke,QIAO Chunjie,et al. Design of any-order direct digital synthesizer for high-dynamic GNSS sig-nal Doppler simulation[J]. Journal of National University of De-fense Technology,2016,38(3):7-11.
[9] MEHRDAD S. SAR-ECCM using phase-perturbed LFM chirp signals and DRFM repeat jammer penalization[J]. IEEE tran-sactions on aerospace and electronic systems,2006,42(1):191-204.
[10] GEORGE W S. Introduction to airborne radar[M]. 2nd ed.Mendham,NJ:SciTech Publishing,Inc.,1998.
[2]李尚生,付哲泉,张军,等.相参雷达典型干扰信号产生及关键技术[J].海军航空工程学院学报,2015,30(4):345-348.LI Shangsheng,FU Zhequan,ZHANG Jun,et al. Typical in-terfering signal and key technology of coherent radar[J]. Jour-nal of Naval Aeronautical & Astronautical University,2015,30(4):345-348.
[3]宫新玉,张友益.几种常用AESA多功能雷达低截获概率波形的仿真设计[J].舰船电子对抗,2016,39(6):5-12.GONG Xinyu,ZHANG Youyi. Simulation and design of LPI waveform of several common multi-function AESA radar[J].Shipboard electronic countermeasure,2016,39(6):5-12.
[4]韩阳阳,苏五星,卢小勇,等.低截获概率抗干扰研究[J].舰船电子对抗,2013,36(3):22-26.HAN Yangyang,SU Wuxing,LU Xiaoyong,et al. Research into the anti-jamming of LPI technology[J]. Shipboard electro-nic countermeasure,2013,36(3):22-26.
[5]樊世杰,蔡飞,范红旗,等.基于AD9910的调频非线性步进信号生成方案[J].雷达科学与技术,2011,9(1):77-83.FAN Shijie,CAI Fei,FAN Hongqi,et al. Scheme for nonli-near stepped-frequency chirp signal generation based on AD9910[J]. Radar science and technology,2011,9(1):77-83.
[6]吴志毅,罗凌.基于AD9914宽带线性调频源的设计及实现[J].电子技术应用,2015,41(10):30-33.WU Zhiyi,LUO Ling. Design and realization of a broadband microwave frequency source[J]. Application on electronic tech-nique,2015,41(10):30-33.
[7] SHENG Mengmeng,LIU Haibo,WANG Junfu,et al. Direct digital generation of ultra-wideband LFM signal and its compen-sation technology[C]//2013 IET International Radar Confe-rence. Xi’an,China:IEEE,2013:1-5.
[8]周超,王跃科,乔纯捷,等.高动态GNSS信号多普勒模拟任意阶直接数字合成器设计[J].国防科技大学学报,2016,38(3):7-11.ZHOU Chao,WANG Yueke,QIAO Chunjie,et al. Design of any-order direct digital synthesizer for high-dynamic GNSS sig-nal Doppler simulation[J]. Journal of National University of De-fense Technology,2016,38(3):7-11.
[9] MEHRDAD S. SAR-ECCM using phase-perturbed LFM chirp signals and DRFM repeat jammer penalization[J]. IEEE tran-sactions on aerospace and electronic systems,2006,42(1):191-204.
[10] GEORGE W S. Introduction to airborne radar[M]. 2nd ed.Mendham,NJ:SciTech Publishing,Inc.,1998.