Aumento de capacidade em sistemas MIMO coordenados para advanced LTE com utilização de repetidores fixos

With the aim of providing high data rates, the Long Term Evolution (LTE) standard makes use of relaying as one of the important techniques for new mobile networks. LTE will also make use of the Multiple-Input Multiple-Output (MIMO) technique, to improve the transmission’s quality in hostile environments and to offer very high data rates. The relay solution in mobile networks planning is a highly used technique in next LTE networks. This technique has the aim of increasing the network coverage and/or capacity and improves the cell edge throughput. The Relay Station (RS) performance depends on its position in the cell, the radio conditions to which the RS and the User Equipment (UE) are subjected, and the RS capability to receive process and forward the information. The aim of this thesis is to conclude about the optimized position in which a RS (from types Amplify and Forward (AF)/ Selective Decode and Forward (SDF)) should be placed, with the aim of maximizing the UE throughput. Furthermore, to compare the performance of Transmit Diversity (TD) versus Open-Loop Spatial Multiplexing (OL-SM) MIMO in LTE, and under which conditions they should be used, in a network equipped with Fixed Relay Stations (FRSs). Key-words: Wireless Communications, LTE, Relay, Amplify and Forward, Selective Decode and Forward, MIMO.