Internet-of-Things (IoT) represents a breakthrough for the current ICT market. In many IoT applications, sensors and actuators are distributed over very wide areas, sometimes not reached by terrestrial networks. In such scenarios, the satellite plays a significant role. In this paper, a Software-Defined Radio (SDR) - based satellite gateway for Internet-of-Remote-Things (IoRT) is proposed. The use of SDR allows to decrease equipment cost and provides higher flexibility. The proposed architecture has been implemented by using a standalone SDR platform and Commercial Off-The-Shelf (COTS) modules for covering the main terrestrial IoT standards. Extensive proof-of-concept results are presented and discussed. Uplink and downlink tests showed the correct functionality implementation and transmitted signal generation, while the integration tests allowed to assess the reliability of the end-to-end information processing. Reconfigurability tests confirmed the capability of the gateway of dynamically updating in real-time its protocol settings. The overall test results showed the validity of the proposed SDR-based gateway for IoRT applications.

中文翻译：

---

用于远程物联网 (IoRT) 应用的基于 SDR 的卫星网关

物联网 (IoT) 代表了当前 ICT 市场的突破。在许多物联网应用中，传感器和执行器分布在非常广泛的区域，有时地面网络无法到达。在这种情况下，卫星发挥着重要作用。在本文中，提出了一种基于软件定义无线电 (SDR) 的用于远程物联网 (IoRT) 的卫星网关。SDR 的使用可以降低设备成本并提供更高的灵活性。所提议的架构是通过使用独立的 SDR 平台和商业现货 (COTS) 模块实现的，以涵盖主要的地面物联网标准。展示和讨论了广泛的概念验证结果。上行链路和下行链路测试显示了正确的功能实现和传输信号生成，而集成测试允许评估端到端信息处理的可靠性。可重构性测试证实了网关实时动态更新其协议设置的能力。总体测试结果表明，所提议的基于 SDR 的网关适用于 IoRT 应用程序的有效性。