中文摘要：

为提高星载ATI-GMTI系统灵敏度和防止卫星碰撞，卫星间距一般较远，盲速问题比较突出，严重影响系统动目标检测性能．设计沿航向基线以获得优化的速度响应是星载系统需要研究的重要问题．本文以获得最优速度响应为目的，在对单颗星接收天线进行子阵分割的基础上，首先推导了理想杂波假设下系统输出信杂噪比的表达式，进而提出了最优基线设计方法，最后计算机仿真验证了该方法的有效性．

英文摘要：

The Spacebome ATI-GMTI system is made up of several satellites equipped with Synthetic Aperture Radar. The space between satellites must be big enough to acquire high sensitivity and avoid collision. However, the long baseline brings on blind velocity and worsens the GMTI performance. It is an important problem to determinate the length of the along track baseline for an ATI-GMTI system. Basing on splitting the whole aperture into multiple sub-apertures, this paper investigates the design method of optimum velocity response. Firstly, the output signal-to-clutter-plus-noise ratio expression of the system is derived, and then the way of designing optimum velocity response is presented.Finally,computer simulation results validate its effectiveness.