We study the performance of uplink transmission in a large-scale (massive)
MIMO system, where all the transmitters have single antennas and the receiver
(base station) has a large number of antennas. Specifically, we analyze
achievable degrees of freedom of the system without assuming channel state
information at the receiver. Also, we quantify the amount of power saving that
is possible with increasing number of receive antennas.Comment: 5 pages, no figur