H-MIMO: a hybrid of spatial multiplexing and adaptive beamforming
Date
2005
Authors
Lim, GuBong
Journal Title
Journal ISSN
Volume Title
Publisher
University of Delaware
Abstract
The use of multiple antennas at both ends of a wireless link can provide substantial increases in capacity. In MIMO systems, the multiple antennas could be utilized in different ways to maximize the performance in a particular environment. Previously, a spatial multiplexing system was compared with a system that uses multiple antennas to perform adaptive beamforming. In this thesis, we evaluate the performance of a hybrid MIMO (H-MIMO) system where the antennas are used in a combination of these two modes. Through simulations, we show that, over a wide range of target outage probabilities and Ricean K factors, the hybrid systems can achieve higher efficiencies for users who are farther from the base station or, alternatively, can provide higher capacities to a larger percentage of users in a cell.