一种对称三角线性调频连续波雷达的校正算法  

A Kind of Calibration Algorithm of Symmetrical Triangular Linear Frequency Modulated Continuous Wave Radar

作　　者：侯志[1] 缪晨[1] 吴文[1] 张铎[1] 

机构地区：[1]南京理工大学近程高速目标探测技术国防重点学科实验室,江苏南京210094

出　　处：《兵工学报》2010年第12期1546-1550,共5页Acta Armamentarii

摘　　要：FFT变换的分辨率和栅栏效应会对系统测速、测距精度造成影响,实际应用中需要对线性调频连续波(LFMCW)雷达回波处理结果进行频域校正。分析了对称三角线性调频连续波雷达二维FFT测距、测速以及去耦合原理,提出了一种频域校正方法,该方法对雷达回波信号进行二维信号处理并对信号处理结果分别进行校正,消除了多普勒频移不敏感目标的距离速度耦合现象和FFT变换栅栏效应对系统测量精度的影响,从而提高测距、测速精度。仿真和试验结果证明了算法的有效性。Since the range and velocity measurement accuracy are influenced by resolution and fence effect of FFT transform, the frequency domain calibrations for the measurements in the linear frequency modulated continuous wave （LFMCW） radar system are needed in the practical applications. This paper discusses the range/velocity estimation principles and decoupling algorithms in LFMCW radar system, and presentes a calibration method based on two-dimension frequency domain. By using the method, the radar echo signals are processed in two-dimension frequency domain and the processing results are calibrated respectively. It eliminates the influences of Doppler frequency insensitive target’s range-velocity coupling and fence effect to improve the range and velocity measurement accuracy. Simulation and experiment results verify the effectiveness of the method.

关 键 词：雷达工程 线性调频连续波雷达 二维信号处理 频域校正 

分 类 号：TN959.1[电子电信—信号与信息处理]