一种基于FPGA的并行结构瞬时测频方法  

A Method of Instantaneous Frequency Measurement Based on Parallel Architecture of FPGA

作　　者：朱明辉[1] 司斌[1] 张从霞[1] 张鹏[1] 

机构地区：[1]中国空空导弹研究院,河南洛阳471009

出　　处：《测控技术》2017年第5期42-45,共4页Measurement & Control Technology

摘　　要：针对捷变频雷达信号的数字测频存在数据处理量大、实时性要求高的问题,介绍了一种基于正交混频、滤波抽取和瞬时自相关算法的并行结构测频方法。通过将正交混频本振频率设为采样频率的四分之一,减少了正交混频模块和滤波模块的FPGA资源消耗。测试结果表明该测频算法的数据处理能力、实时性及测频精度能够满足雷达目标模拟器的测频需求。In order to solve the problems that the digital frequency measurement of frequency agile radar signal has a large data processing capacity and high real-time requirement, a method of instantaneous frequency meas- urement based on orthogonal mixing, filtering extraction and instantaneous correlation with parallel architecture is introduced. By setting the frequency of orthogonal mixing to a quarter of the sampling frequency, the FPGA resource consumption of orthogonal mixing and decimation filter is reduced. The results prove that the frequen- cy measurement algorithm has strong processing capability and real-time, and high frequency measurement ac- curacy, which can meet the needs of radar target simulator.

关 键 词：捷变频雷达 并行结构 瞬时测频 FPGA 

分 类 号：TM93[电气工程—电力电子与电力传动]