LFMCW雷达中精确测频算法研究  

The Research of Precision Frequency Measurement in LFMCW Radar

作　　者：李志[1] 敬守钊[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都610054

出　　处：《电子质量》2014年第8期1-3,6,共4页Electronics Quality

摘　　要：在LFMCW测距雷达中,差频信号测频是否精确关系到整个雷达系统的测距精度。该文分析了在LFMCW测距雷达中精确测频的难度,提出了基于FPGA的变频采样算法。该算法采用VerilogHDL在ISE平台上编写,通过了Modelsim仿真验证。该算法与其他精确算法相比,具有实现简单,占用FPGA资源少,测频误差小的优点,有一定的工程实现价值。In the LFMCW ranging radar,whether frequency measurement precision of the difference frequency signal is important to the ranging precision of the radar system.This paper analyses the difficulty in precision of frequency measurement in LFMCW ranging radar,proposes the frequency conversion sampling algorithm based on FPGA.The algorithm adopts the Verilog HDL in ISE platform,passes the Modelsim simulation validation.Compared with the traditional precise algorithm,it has some advantages of the simple implementation,occupying less FPGA resources,a little of frequency measurement error.So,this algorithm has some engineering value.

关 键 词：LFMCW雷达 FPGA VERILOG HDL 变频采样 

分 类 号：TN953.2[电子电信—信号与信息处理]