Implementation of OFDM Using GNU Radio with HackRF One and RTL-SDR

Modern communication systems frequently employ orthogonal frequency division multiplexing (OFDM) as a modulation technology because of its capacity to reduce the impacts of inter-symbol interference and multipath fading. In this work, the implementation of OFDM using GNU Radio with the HackRF One software-defined radio (SDR) platform has been proposed. The work aims to demonstrate the practical implementation of OFDM, a complex digital communication technique, using readily available hardware and open-source software tools. GNU Radio provides a flexible and powerful framework for signal processing and modulation, while the HackRF One SDR offers the capability to transmit and receive RF signals over a wide frequency range. The implementation involves designing and configuring OFDM transmitter and receiver blocks within the GNU Radio environment, utilizing the HackRF One for RF signal transmission and RTL-SDR for reception. Various aspects such as synchronization, channel estimation, and error correction will be addressed to ensure reliable communication performance. The work not only serves as an educational resource for understanding OFDM principles and GNU Radio usage but also provides a practical platform for experimenting with SDR technology in real-world communication scenarios. OFDM (Orthogonal Frequency Division Multiplexing) signal transmission has been successfully implemented to accommodate three distinct types of input data: textual, audio, and image inputs and their corresponding waveforms and outputs have been obtained.