Optimized Codebook Based Hybrid Beamforming

Abstract: In this thesis we research beamforming capabilities of the UEs equipped with several antennas in a 5G scenario. We define a system model based on the use of phase codebooks that allow to change the radiation patterns of the arrays of antennas installed in the UE. Within this system model, we obtain optimized codebooks in terms of two metrics, which we consider to be of interest in this scenario, employing two different optimization approaches. We use these results to analyze, through simulations, the estimation performance in an AoA estimation scenario. We also analyze the detection performance in receiving the signal that can allow us to estimate the AoA. So as to gain more insight into how the selection of the optimum codebook affects the detection performance, we define a simpler scenario and we analyze it theoretically and draw conclusions that relate to the simulations obtained.