On MIMO Performance Enhancement With Multisector Cooperation in a Measured Urban Environment

Capacity improvement of intrasite cooperative multiple-input-multiple-output (MIMO) using all three 120
^°
sectors of a base station (BS) site is studied for the first time in a measured urban environment at 2.65 GHz. The results show that the mean uplink capacity gain exceeds 40% in as much as 1/4 of the coverage area, relative to the best single-sector link with no cooperation. In addition, a simple simulation model is developed for predicting the capacity gain from intrasite multisector cooperation. The model is used to unravel the respective roles of the BS antenna patterns and propagation mechanisms in determining cooperative performance .