The Key Questions Discussing of the Inter-Satellite Link (ISL) Signal Design Based on Earth-Moon System

摘要

There are four kinds of inter-satellite link (ISL) based on Earth-Moon Lagrange navigation system. The much larger difference in transfer distance leads to large signal level dynamic range. Therefore signal design has much difficulty. In order to simplify the complexity of satellite payload, an integrative ISL signal scheme based on CDMA technique is proposed. The question of signal frequency selection and near-far effect have been analyzed in this article. The scheme's feasibility is justified by theoretical modeling and simulation calculation in the end.