收发分置前视合成孔径激光雷达成像系统研究

Study on Forward looking SAL Imaging System

摘要:

研究了一种新型的收发分置的前视合成孔径激光雷达(SAL)成像系统。给出了系统的结构模型, 分析了系统成像原理, 详细推导了点目标的回波模型和适用于前视成像的距离多普勒(RD)算法, 最后通过Matlab对9点目标的情况进行了成像仿真, 对点目标峰值中心的128×128点切片和方位向、距离向包络进行了详细分析, 结果表明该系统可以有效地对雷达前视场景进行成像。

Abstract:

In this paper, a new type of forward looking synthetic aperture laser radar (SAL) imaging system was studied based on one central optical element for laser transmitting and N elements for echo receiving. Firstly, the system architecture model was given and the imaging principles were analyzed. Then the target echo model and range doppler algorithm(RDA) were proposed for forward looking SAL. Lastly, nine point target imaging was simulated, 128×128 points slice of the target peak center and envelope of azimuth and range were analyzed in detail. Simulation results demonstrate the validity of the imaging system.