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介绍了高轨卫星通信系统链路预算任务及设计方法,给出了链路预算所涉及的核心公式,并在此基础上通过MATLAB中GUIDE模块研制一款可实现多参数互算的链路预算软件。该软件弥补现有多数链路预算软件功能单一的缺陷,实现了发射功率、信息速率和发射天线口径之间的相互运算。介绍了链路预算软件的设计思想及方法,并详细阐述了本款软件所实现的功能,最终给出软件的用户界面和通过此软件完成的链路预算实例。
This paper introduces the link budget task and design method of high-altitude satellite communication system, and gives the core formula involved in the link budget. On the basis of this, we develop a link budget that can achieve multi-parameter mutual calculation through GUIDE module in MATLAB software. The software makes up for the single defect of most existing link budget software and realizes the mutual operation between transmit power, information rate and transmit antenna caliber. The design idea and method of link budget software are introduced, and the functions of this software are expounded in detail. Finally, the user interface of the software and the link budget example completed by the software are given.