Abstract
An investigation of two Massive Multiple-Input Multiple-Output (MIMO) scenarios, with distributed and collocated transmitter antenna cases for a large dense urban environment, is performed based on ray tracing simulations. The scenarios consist of maximum 4096 transmitter antennas and 500 single antenna users which are at the ground level. The environment is one quarter square kilometre large and consists of 92 buildings with various heights. Channel matrices are obtained using ray tracing simulations. Maximum Ratio Transmission (MRT) and Minimum Mean Square Error (MMSE) linear beamformers are implemented during the post processing. The downlink performances are investigated. The results indicate that the variation of performance among the users can be different even though the average performance figures are not significantly different for the given deployment schemes.
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