This paper describes an implementation for a ground station framework based on the actor model and software-defined radios (SDRs), allowing for a highly scalable system that can operate on low-cost receivers or scale to a collection of servers. The actor model defines a concurrent system where the individual unit of computation is the actor and communication between components is handled through a message passing interface. Pystation is an actor framework written in Python that implements a message-passing scheme where each actor has the ability to communicate with local actors or actors across a network. This paper describes some historical and background information on the actor model followed by details of its implementation and examples of use at a ground station. GNU Radio is utilized as the software for physical layer and signal processing, allowing for a highly robust and flexible ground station that can be altered without tedious hardware modifications. The purpose of this framework is to provide the software foundation to the Virginia Tech Ground Station (VTGS) in order to increase reliability and flexibility. The Virginia Tech Ground Station project is meant to serve as a ground station operations and communications sandbox for educational activities, such as student labs and space-based research projects.
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机译：本文介绍了一种基于参与者模型和软件定义无线电（SDR）的地面站框架的实现，该框架允许可在低成本接收器上运行或扩展到服务器集合的高度可扩展系统。参与者模型定义了一个并发系统，其中单个计算单位是参与者，组件之间的通信通过消息传递接口进行处理。 Pystation是一个用Python编写的actor框架，它实现了一种消息传递方案，其中每个actor都有能力与本地actor或整个网络中的actor通信。本文介绍了有关参与者模型的一些历史和背景信息，然后介绍了其实现的详细信息以及在地面站上的使用示例。 GNU Radio被用作用于物理层和信号处理的软件，从而可以实现高度健壮和灵活的地面站，而无需进行繁琐的硬件修改即可对其进行更改。该框架的目的是为弗吉尼亚技术地面站（VTGS）提供软件基础，以提高可靠性和灵活性。弗吉尼亚理工大学地面站项目旨在用作教育活动的地面站运营和通讯沙盒，例如学生实验室和太空研究项目。
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