基于GEO星群的深空联合阵列与协作传输机理

项目名称： 基于GEO星群的深空联合阵列与协作传输机理

项目编号： No.91338112

项目类型： 重大研究计划

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 张钦宇

作者单位： 哈尔滨工业大学

项目金额： 85万元

中文摘要： 本课题面向世界航天科技、空间信息科学和深空通信的发展趋势，围绕着探索基于GEO星群的深空通信系统信息传输能力界这一目标，以搭建地基-天基联合阵列为切入点，构建深空中继与协作通信系统。重点针对高动态环境下联合阵列阵元间信号传输的传播特性、适用条件和协作方法等内容开展研究，明晰基于GEO星群的地基-天基联合阵列传输机理，探索高动态、大尺度环境下空间信息网络对深空通信的时空连续支撑能力，部分解决深空通信发展所遇到的难题，实现深空环境下信息传输能力的有效提升，为深空通信、空间信息网络和分布式卫星群的发展奠定相关应用基础。本课题拟以双星编队为中继平台开展协作接收，与单天线系统相比提高深空链路的信噪比增益约3-4dB，使传输速率提高1-2倍，并确定星群编队数量与增益之间定量关系及星群优化设计方法，为我国火星探测及空间信息网络的拓扑设计、星座规划等提供参考依据。

中文关键词： 深空通信；GEO；卫星群；协作；天线阵

英文摘要： With the trends of the globe developments on the scientific aerospace techniques and space communications, this project develops an elaborated relay-based deep space communication system standing on the space-based and earth-based joint antenna array, which fully exploits the capabilities of GEO satellite formations for collaborative signal-processing. The work will put the highlights on the theoretical informatics principle, spacecraft kinematics structure and astrodynamics mechanism, focusing on the applicative prerequisite, the intended capacity and the specified schemes of the well-designed system. By exploring the hardly-disconnected supporting capabilities of space network in the high dynamic scenarios, as in this work, we could make systematic theoretical and technical breakthroughs on the applications of the earth-space network into the deep space, and consequently address critical challenges in the way of prompting space communications. As a hopeful result, starting at the two-satellite team, the project expects to make the following improvements: obtaining 2-3dB gains with the respect of the signal-to-noise ratio and doubling almost the data rate, compared with the current single antenna system. Moreover, the project attempts to find the optimization approach of GEO formation and the scaling law of the

英文关键词： space communication；GEO；satellite formation；collaboration；antenna array