根据星座空间几何基础,以及卫星对地面的覆盖情况以及点波束的形状,通过建立数学模型,提出了地面终端确定所在点波束的仿真算法;并以典型的低轨卫星移动系统Globalstar为仿真背景,仿真得出了与实际系统参数接近的结果,验证了算法。
According to the space geometry; the coverage of satellite constellation on earth,and the shape of spot beam, by building up mathematic model, a spot beam judgement simulation algorithm is proposed. Based on the typical LEO system-Globalstear, it is simulated and gets reasonable results, which is similar to real system parameters and improves the algorithm.