星间激光通信系统粗精复合扫瞄技术

Research on coarse-fine composite technology for scanning in inter-satellite laser communication

星间激光通信系统主要分为捕获、瞄准、跟踪技术,其中捕获技术是星间激光通信系统实现通信的前提和保障。通过对星间通信捕获阶段信标光的粗瞄捕获原理、关键技术和工程应用等内容进行详细的研究,提出一种粗瞄与精瞄相互结合的螺旋-正弦复合扫瞄的方法。对该方法扫瞄过程中的数值分析表明,相比单一粗瞄扫瞄方式,粗精复合扫瞄方法的扫瞄漏扫区域比单一粗扫瞄漏扫区域小、捕获概率更高、捕获时间短。该方法为星间激光通信扫瞄捕获过程提供了一种新的扫瞄方式,具有重要的意义。

The inter-satellite optical communication system consists of acquisition, pointing and tracking technology; the acquisition technology, which is the premise and guarantee for normal work. The principle of acquisition, key technology and engineering implementation under scanning stare mode were studied in detail. A method for combination of the coarse fine pointing of spiral sine was presented. Numerical simulation results for the scanning process prove that the proposed method has smaller missing scanning area, higher acquisition probability and shorter acquisition time when compared with the traditional single coarse scanning. The coarse fine scanning type is a new method for inter-satellite communication. The proposed method has an important significance in providing a new method for inter-satellite laser communication.