A FAIR COMPARISON BETWEEN HYBRID AND CONVENTIONAL BEAMFORMING RECEIVERS WITH MODERATE VALUES OF SYSTEM PARAMETERS

The main role of smart antennasis to mitigate Multiple Access Interference (MAI) by beamforming (Spatial filtering) operation. In addition to MAI, the performance of receivers is limited by fast fading. In this context, we propose in this paper a hybrid scheme of beamforming and diversity called HBF (Hierarchical Beamforming) and we propose a system model for the mathematical characterization of HBF for the performance evaluation.Moreover, we compare the performance of HBF receiver with conventional Beamforming (CBF) one. The proposed model conforms the benefits of adaptive antennas in reducing the overall interference level (intercell/intracell) and to find an accurate approximation of the error probability.