  Future communication systems employing massive multiple input multiple output
will not have the ability to use channel state information at the mobile user
terminals. Instead, it will be necessary for such devices to evaluate the
downlink signal to interference and noise ratio (SINR) with interference both
from the base station serving other users within the same cell and other base
stations from adjacent cells. The SINR will act as an indicator of how well the
precoders have been applied at the base station. The results presented in this
paper from a 32 x 3 massive MIMO channel sounder measurement campaign at 2.4
GHz show how the received bit error rate and error vector magnitudes can be
used to obtain a prediction of both the average and dynamically changing SINR.
