基于快速迭代插值的FMCW雷达距离估计算法  

FMCW radar range estimation algorithm based on fast iterative interpolation

作　　者：段永昌 李欣[2] 黄耀辉 黄平[3] DUAN Yongchang;LI Xin;HUANG Yaohui;HUANG Ping(China Ship Development and Design Center, Wuhan 430064, China;Engineer Training Center, Harbin Engineering University, Harbin 150001, China;College of Automation, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]哈尔滨工程大学工程训练中心,黑龙江哈尔滨150001 [3]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《通信学报》2019年第9期175-183,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61571148,No.61871143);中央高校基本科研业务费专项资金资助项目(No.HEUCFG201823,No.3072019CF0402);黑龙江省自然科学基金资助项目(No.LH2019F006);哈尔滨市应用技术研究与开发基金资助项目(No.2017RAQXJ095)~~

摘　　要：针对多目标环境中车载防撞雷达的测距精度易受到频谱间干扰的问题,提出了一种改进的基于迭代插值的多目标距离估计算法。首先,利用快速傅里叶变换并结合恒虚警检测算法估计出不同距离的目标个数及目标的粗略位置;然后,对目标的频谱进行非均匀迭代插值,并在每次迭代的过程中消除频谱间干扰,从而得到更精确的距离。仿真实验表明,所提算法在多目标环境中和低信噪比条件下均具有更高的估计精度。使用DSP芯片实现了所提算法,证明该算法满足实时性的要求,易于工程实现。For the multi-target detection, a multi-objective range estimation algorithm was proposed based on iterative interpolation to solve the problem of the range accuracy of frequency modulation continuous wave(FMCW) radar being easy to be interfered by spectrum. Firstly, the number of targets and the rough location of the target were obtained through the fast Fourier transform(FFT) and the constant false alarm(CFAR) detection algorithm. Then spectrum was iteratively interpolate, and the inter-spectral interference was eliminated during each iteration to obtain more accurate distance. Simulation results show that the proposed algorithm has higher estimation accuracy in multi-target environment and low Signal-to-noise ratio(SNR). The proposed algorithm is implemented by DSP, which proved that the algorithm meets the real-time requirements and is easy to be implemented in engineering.

关 键 词：调频连续波雷达 快速傅里叶变换 距离估计 频谱干扰 

分 类 号：TN958.94[电子电信—信号与信息处理]