Применение технологии SDR для повышения помехозащищенности: экспериментальное исследование канала с OFDM модуляцией в GNU RADIO

Abstract

The article presents a comprehensive analysis of multiplexing techniques, with a specific focus on OFDM. OFDM is a transmission method that employs multiple carriers to achieve high data transfer rates. The article provides a thorough explanation of the fundamental concepts, as well as an in-depth discussion on the various applications, technologies, and modulations associated with OFDM. The primary objective of the study is to investigate the implementation of an OFDM communication system using SDR technology. This involves simulating a radio channel to emulate real-world conditions and evaluating the system's performance in terms of packet reception over an actual radio channel. The use of SDR offers several advantages, such as flexibility, adaptability, and cost-effectiveness. Throughout the research, a detailed analysis of the benefits and limitations of OFDM and SDR is conducted, and potential solutions to overcome the identified drawbacks are proposed. The selection of this research direction is motivated by the significant advantages offered by OFDM and SDR, particularly in terms of channel capacity and cost-efficiency. To validate the theoretical concepts and evaluate the practical implementation, a prototype of the OFDM communication system is developed using GNU Radio, an open-source software platform known for its versatility and extensive capabilities. By examining the performance and feasibility of the OFDM communication system implemented with SDR technology, the study aims to provide valuable insights into the advantages, challenges, and potential enhancements in utilizing OFDM and SDR for multiplexing applications.