基于Stretch处理的毫米波调频步进雷达信号处理技术研究  

MMW Chirp-subpulse Stepped-frequency Radar Signal Processing Technology Based on Stretch

作　　者：张忠传[1,2] 牟善祥[1] 徐光进[1] 张劲东[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094 [2]沈阳炮兵学院电子系,辽宁沈阳110162

出　　处：《南京理工大学学报》2010年第1期121-125,共5页Journal of Nanjing University of Science and Technology

摘　　要：研究了毫米波调频步进雷达Stretch(去斜率)处理中快速傅里叶变换(FFT)点数和采样间隔的选择原则。针对大带宽信号对大距离窗口的观测,提出了基于二维FFT的调频步进雷达高分辨距离像合成方法,考虑到对目标运动的敏感性问题,提出了基于帧间脉冲多普勒的速度补偿方法。利用较少的子脉冲和较低的系统采样率,该方法可实现大带宽信号对大距离窗口内静止和运动目标的观测。仿真结果表明了该方法的有效性。The stretch processing technology of MMW chirp-subpluse stepped-frequency radar is analyzed and the chosen criteria of Fast Fourier Transformation （FFT） size and sampling interval are given. Two dimensional FFT processing methods are proposed to synthesize the high resolution range profile for monitoring large range window using wideband signal. Considering the sensitivity of the target movement, a new motion compensation method based on pulsed Doppler between two continuous frames is investigated. By this method, the radar system can utilize fewer sub-pulses and lower AD sampling rate to measure stationary and moving targets in large range window with wideband sig- nal. Simulation results show the effectiveness of this method.

关 键 词：去斜率 调频步进信号 速度补偿 距离高分辨 

分 类 号：TN957.51[电子电信—信号与信息处理]