基于运动补偿的长时相干积累方法研究

A study on long-time coherent integration method based on motion compensation

稀布阵综合脉冲孔径雷达(SIAR)是一种全新体制的数字综合孔径雷达,其发射信号在空间全向辐射,不存在波束扫描问题,可对接收回波进行长时积累。本文首先对目标回波信号建模,分析了长时相参积累存在距离走动、多普勒扩散等问题。提出了一种对回波信号先分组多普勒滤波再非相参积累的方法,并给出了工程实现途径。通过仿真和实际工程的验证,证明了该算法的有效性。

The Sparse-array Synthetic Impulse and Aperture Radar（SIAR） is a new digital synthetic aperture radar with the transmitting signals isotropically radiated to space.Without the problem of beam scanning,the long-time integration for the echoes received can be carried out.The modeling of echo signals is done,and some problems such as the range migration and the Doppler diffusion of the long-time coherent integration are analyzed.A method of the grouping Doppler filter and the non-coherent integration for echo signals is presented with the engineering implementation given.The algorithm is verified to be effective through the simulation and engineering application.