【作者】 康勇； 杨子杰； 钟志峰； 张树杰；

【Author】 Kang Yong~(1,2),Yang Zhi-jie~1,Zhong Zhi-feng~3,Zhang,Shu-jie~2 (1.School of Electronic Information,Wuhan University,Wuhan 430079,China;2.Air Defense Forces Command Academy,Zhengzhou 450052,China;3.Hubei University,Wuhan 430000,China;)

【机构】 武汉大学电子信息学院； 防空兵指挥学院； 湖北大学；

【摘要】 针对高频地波雷达目标回波的特点,提出了一种基于DRFM技术的高频地波雷达回波模拟器实现方案。系统采用了数字上、下变频技术,利用FPGA构建DRFM的核心单元:存储器和控制器,由PC机通过VXI总线实现模拟目标参数的独立控制,即解决了延时线模拟器回波参数固定的问题,又扩展了回波模拟器的应用范围。文中重点讨论了高频地波雷达回波模拟的设计原理,给出了系统的实现方案,通过理论分析和仿真结果验证了方案的可行性。更多还原

【Abstract】 Aimed at the echo’s characteristics of LMF radar,HF surface wave radar’s echo simulator based on digital radio frequency memory is presented.The system uses digital down-conversion technology and digital up-conversion technology.The digital memory and controller of DRFM is designed on a FPGA chip. Compared with the traditional simulator based on analog delay line,the parameters of simulant echo can be controlled conveniently and independently.The simulator’s principle and its design for HF chirp radar are discussed in detail.Through theoretical analysis and simulation results,the validity of this method to simulate radar echo is proved.更多还原