Implementação de pré-codificador SM-MIMO para 4G/LTE em plataforma SDR

摘要

The main goal of this dissertation is the development and evaluation of newtechniques to be used in new generation of wireless comunication devices.It focuses on the usage of multiple antennas (MIMO), precoding and the usageof spatial multiplexing in disregard of diversity techniques. This makespossible to increase data rates considerably. Throughout the document, areshown several multiplexing techniques, theoretical information about wirelesspropagation, and multiple antennas techniques. It was proposed and implementeda spatial multiplexing system. Firstly it was implemented in Matlab,with two precoders tested: Zero Forcing (ZF) and Minimum Mean Square Error(MMSE). Subsequently a System Generator implementation (this time withonly ZF equalizer) was made in order to make possible the migration to FPGAs.Both implementations were tested and validated, we also concluded thatZF based pre-coder had a lower Bit Error Rate for the same Signal to NoiseRatio (SNR).