GEO卫星斜投影多波束的椭圆参数分析

Elliptic Parameter Analysis for Inclined Projective Multi-beam of GEO Satellite

在多波束卫星通信系统中,斜投影多波束引入了椭圆形波束投影,又称椭圆小区。在此基础上,首先对椭圆小区的成因以及椭圆小区和圆形小区的不同特性进行了简要介绍,然后对不同位置下椭圆小区的半长轴和半短轴的计算公式进行了推导,并对GEO卫星覆盖范围内椭圆小区参数的变化进行了计算,最后得出当小区中心与卫星正投影点的距离较大时,椭圆小区的尺寸与赤道处的圆形小区相比有较大不同,可为以后的卫星波束规划和干扰研究提供参考。

In multi-beam satellite communication systems,inclined projective multiple beams give rise to elliptic beam projections, also known as elliptic cells. This paper introduces the cause of elliptic cells and different characteristics between elliptic cells and circular cells, derives calculation formulas for semi-major axis and semi-minor axis of elliptic cells located in different positions, and calculates variation of these parameters within range of GEO satellite coverage area. The results show that when the latitude of the cell is high, the size of elliptic cell has a large difference from the circular cell whose center is at the equator. This paper can provide reference for later satellite beam planning and interference research.