毫米波辐射计数字相关器的设计  

Digital correlator design of millimeter wave radiometer

作　　者：胡文庆 孙林[1] 刘浩 陆浩 吴琼之[1] HU Wen-qing;SUN Lin;LIU Hao;LU Hao;WU Qiong-zhi(School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China;National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]北京理工大学信息与电子学院,北京100081 [2]中国科学院国家空间科学中心,北京100190

出　　处：《电子设计工程》2019年第13期105-108,113,共5页Electronic Design Engineering

基　　金：国家自然科学基金项目(41675035)

摘　　要：在微波遥感领域,基于FPGA的数字相关器在集成度、可变积分时间、最大通道数等方面具有很大的优势。数字相关器使用单片逻辑资源丰富的FPGA--XC7V2000T即完成70个通道的数字相关处理,文章给出了相关器时钟拓扑和电源网络设计,软件设计中给出了相位同步方法和关键时序优化措施。经过测试,数字相关器通道间相位差异小于100ps,反演成像效果良好。In the field of microwave remote sensing,the digital correlator based on FPGA has great advantages in terms of integration,variable integration time,and maximum channel number.The digital correlator uses a single-chip FPGA-XC7V2000T which is rich in logic resources to complete digital correlation processing between 70 channels.The article gives the correlator clock topology and power network design.The phase synchronization method and key timing optimization are given in the software design.Measures.After test,the phase difference between the digital correlator channels is less than 100ps,and the inversion imaging effect is good.

关 键 词：FPGA 数字相关器 相位同步 时序优化 

分 类 号：TN959.1[电子电信—信号与信息处理]