基于欠定方程的频谱峰值搜索算法及其在连续毫米波雷达系统中的应用  

A Spectral Peak Search Algorithm Based on Underdetermined Equation and Its Application in Continuous Millimeter Wave Radar System

作　　者：陈兵兵 曹欣远 陈明生 齐琦 况晓静 吴先良[3] 陈辉 CHEN Bing-bing;CAO Xin-yuan;CHEN Ming-sheng;QI Qi;KUANG Xiao-jing;WU Xian-liang;CHEN Hui(Hefei Normal University,Hefei,Anhui 230601,China;Anhui Province Key Laboratory of Simulation and Design for Electronic Information System,Hefei,Anhui 230601,China;Anhui University,Hefei,Anhui230601,China;State Grid Hefei Power Supply Company,Hefei,Anhui 230002,China)

机构地区：[1]合肥师范学院电子信息与电气工程学院,安徽合肥230601 [2]电子信息系统仿真设计安徽省重点实验室,安徽合肥230601 [3]安徽大学,安徽合肥230601 [4]国网合肥供电公司,安徽合肥230002

出　　处：《电子学报》2020年第2期369-374,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61701163);安徽省重点研究与开发计划项目(No.201904a05020061);安徽省自然科学基金(No.1808085MF167,1908085QF257);安徽高校省级自然科学研究重点项目(No.KJ2018A0488)。

摘　　要：现有谱峰搜索算法在应用于连续毫米波雷达后端中频信号处理时,或计算量较大,或精度不高.本文针对该问题,提出一种可有效提取信号峰值频率信息的快速算法,进而实现连续毫米波雷达的快速准确测速测距.该算法借助压缩感知原理,通过构建欠定方程,并计算少量内积,实现高效捕捉信号频率值.数值结果表明,此算法具有运算量小、计算精度高等特点,可为当今智能交通领域中的高精度测速测距提供一种快速解决方案.Aiming at the problems existing in the application of existing peak search algorithm to back-end IF(Inter-mediate Frequency)signal processing of continuous millimeter wave radar,such as heavy computation,low precision,a fast algorithm to extract the peak of signal frequency information is proposed,by which high-efficiency and high-precision meas-urements of the speed and distance for continuous millimeter wave radar is realized.By means of the principle of compressed sensing,an underdetermined equation is constructed in the algorithm,and with a few inner product,the frequency correspond-ing to the actual spectral peak of the intermediate frequency signal is captured at a low computational complexity level.Nu-merical results show that the algorithm can obtain an accurate calculation result with small calculation amount,thus providing a fast solution for high-precision speed measurement and ranging in the field of intelligent transportation.

关 键 词：连续毫米波雷达 欠定方程 中频信号处理 谱峰搜索 快速傅里叶变换 压缩感知 

分 类 号：TN957.51[电子电信—信号与信息处理]