基于LMS算法的FOD雷达射频泄露对消技术  

Cancellation technology of RF leakage on FOD radar based on LMS algorithm

作　　者：宋妍[1] 王洪[1] 汪学刚[1] 钟琦 

机构地区：[1]电子科技大学电子工程学院,四川成都611731 [2]中国民用航空局第2研究所,四川成都610041

出　　处：《太赫兹科学与电子信息学报》2016年第1期34-39,共6页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金重点资助项目(6113903);中央高校基本科研业务费资助项目(ZYGX2012J027)

摘　　要：针对机场跑道异物(FOD)探测系统中毫米波调频连续波(FMCW)雷达的射频泄漏问题,研究射频泄漏对消技术。分析了毫米波FMCW雷达中射频泄漏的产生原因,阐述了泄漏信号对FOD检测系统的影响。通过分析自适应滤波的原理,并结合毫米波FMCW雷达的特点,提出了一种基于最小均方误差(LMS)算法的自适应对消技术。仿真验证了该对消方案算法实现的可行性,同时分析了对消方案中数字信号处理(DSP)响应时间对FOD系统性能的影响。仿真实验结果表明,该对消系统的对消比可达到45 d B左右,可实现高精确度对消。RF leakage cancellation technology of millimeter wave Frequency Modulated Continuous Wave(FMCW) radar in Foreign Object Debris(FOD) detection system is studied. The reasons of the RF leakage problem in FMCW radar are analyzed, and the influence of the leakage signal on FOD detection system is described. The principle of adaptive filter is analyzed, and then an adaptive cancellation scheme based on Least Mean Square(LMS) algorithm is proposed,combined with characteristics of FMCW radar. The feasibility of the implementation of the proposed cancellation scheme is verified by simulation. The effect of Digital Signal Processing(DSP) response time on FOD system performance is analyzed. The experimental results show that this scheme can achieve a cancellation rate of 45 d B,and realize a high precision cancellation.

关 键 词：毫米波调频连续波雷达 射频泄漏 最小均方误差 自适应对消 

分 类 号：V35[航空宇航科学与技术—人机与环境工程] TN957.51[电子电信—信号与信息处理]