Increasing the Performance of Low Power Wide Area Networks through Replication, Coding, and Non-Orthogonal Schemes

This thesis comprises a compilation of three scientific articles centered on enhancing the performance of wireless networks. Our emphasis is on wireless technologies designed for transmitting minimal data over extended intervals and long distances. Common applications include sensors in forestry, agriculture, and traffic tracking (e.g., buses). Given that these devices are typically battery-powered, they adopt a simplistic transmission approach to minimize energy consumption and reduce costs. This presents unique challenges in ensuring the reliability of such communications, as conventional solutions employed in traditional communications, such as cellular and Wi-Fi, may not be applicable.