低轨卫星多波束接收的多普勒频移统计特性及应用

为确定低轨卫星多波束接收的多普勒频移特性，通过建立“多点对点”分析模型，推导了等多普勒频移曲线的解析表达式，并仿真给出了该特性曲线。得出了确定卫星各波束多普勒频移统计特性的一般步骤，并结合常见的多波束赋形设计，归纳了各波束的多普勒频移分布特性。作为应用举例，提出了多波束多通道各捕获模块差异化设计和双曲线形式波束赋形的设计思想，对星上再生处理多波束多通道接收机降低复杂度有明显的益处。

Statistical Characteristics and Application of Doppler Shift Receivedby Low Earth Orbit Multi Beam Satellite

In order to analyze the Doppler shift characteristics received by multi beam satellite，the expression of iso Doppler shift characteristic curve is derived from the establishment of ‘multi point to point’ analysis model. And simulation gives the characteristic curve. Combined with common multi beam forming design, the Doppler shift distribution characteristic of each beam is summarized. As an application example, a multi beam multi channel acquisition module and hyperbolic form beam forming design ideas are proposed, which will be benefit for reducing the complexity of the multi channel receiver of multi beam system.