Implementación de un prototipo de sistema MIMO-OFDM 2x2 basado en SDR mediante GNU Radio

Abstract

This work describes the development of a 2x2 MIMO-OFDM system in an SDR environment. Each of the processing stages is taken into account both in reception and in transmission with the different existing blocks in GNU Radio; however, in the absence of some functions, new processing blocks have been created with the help of the Python programming language. The characteristics of the MIMO, OFDM and MIMO-OFDM technologies are presented in general. The block diagrams of both the transmission and reception system are described for a 2x2 MIMO-OFDM communication. The tests and the results obtained in the different environments are presented. It includes simulation environments with and without communication channel, and test environments using USRP RIO equipment. Finally, the conclusions are presented.l design is performed once the voltage level is selected and, using the DigSilent Power Factory software, the simulations of power flows are carried out for 10 conductors selected for the established period. The results are used to calculate the regulation, efficiency, and power losses of the transmission line. The coordination of insulation is calculated according to the IEC 60815-2008 standard, and for the calculation of the ampacity of the selected conductors, the IEEE-738-1993 standard is used. From the meteorological information of the study area, and with the help of the PEEK formula, it is determined if there is a presence of corona effect. To determine the optimal alternative, it is performed on the investment costs and operating costs of the selected conductors.

Finally, by means of the state equations are verified that the selected conductor complies with the mechanical requirements. The mechanical calculations of the transmission line are made with the help of the free software IMEDEXSA 12; and for the budget assement, the referential prices of the EERSSA are used.