Sistema de transmisión continua con multiplexación por división de frecuencias ortogonales OFDM a través de radio definido por software

Abstract

In a world characterized by the constant evolution of communications and technology, the need arises to develop advanced and efficient transmission systems. In this context, the study and development of a continuous transmission system based on the orthogonal frequency division multiplexing (OFDM) technique is presented, using the USRP 2901 software-defined radio device. This device, which operates in a range with frequencies from 70 MHz to 6 GHz, it offers a wide variety of services, including the transmission of modulated signals and the use of white spaces. The focus is on addressing a crucial challenge: implementing a solution that enables consistent and seamless streaming. In this sense, there is the problem of designing a system that uses OFDM technology efficiently, guaranteeing the optimization of the spectrum and the reduction of interference in transmission. This problem is based on the need to maximize the transmission capacity and reliability of communications in environments of high demand and complexity. The developed solution is materialized through a meticulous approach in the configuration and operation of the system using the USRP 2901 equipment. The design process is based on the creation of a detailed guide that breaks down the implementation of OFDM technology step by step, offering students and the academic community a practical tool to understand and apply this technique. The implementation and testing of the system provide encouraging results. A significant increase in spectral efficiency and transmission capacity is observed, which confirms the effectiveness of the proposed solution. In addition, there is evidence of a notable reduction in interference and greater robustness in communications, which supports the suitability of the adopted strategy. In conclusion, this study demonstrates that the implementation of orthogonal frequency division multiplexing (OFDM) through the USRP 2901 device constitutes a viable and effective solution to improve the quality and efficiency of transmissions in modern communication environments. The results obtained underline the importance of comprehensively addressing transmission challenges in the current context, thus contributing to the advancement and optimization of communication technologies.