Experimental Implementation of OFDM Synchronization Algorithms Using Software Radio System (SDR)

Statement of the problem. Software radio allows flexible implementation of algorithms for processing signals in radio communications. Reception of signals is possible only with synchronization in the time and frequency domains, taking into account the properties of the signals. The paper presents a prototype of a communication system with orthogonal frequency multiplexing, implemented on the Adalm Pluto platform using the libiio library. The aim of the study is to analyze and implement software algorithms for symbolic and frequency synchronization when receiving signals with orthogonal frequency multiplexing. For this purpose, a preamble based on the Zadoff – Chu sequence is used. The frequency shift was estimated using two methods: using a cyclic prefix of symbols and using the Zadoff – Chu preamble. Novelty. The developed algorithms are implemented as programs, without using specialized libraries of ready-made modules and tested on the Adalm Pluto hardware platform. The obtained results confirm the operability of the proposed solutions, which allows them to be used in software radio systems when implementing communication channels of various autonomous systems. The practical significance lies in the experimental confirmation of the functionality of the proposed solutions, which allows their use in software radio systems when implementing communication channels for various autonomous systems.