What is the difference between SU-MIMO and MU-MIMO?
September 16, 2019

In SU-MIMO transmission:

  • The cell is serving only one user on a given time-frequency resource, maybe over multiple streams.
  • The multiplexing gain is limited by the minimum of the number of transmitting and receiving antennas.
  • Well supported in current standard specifications like LTE Release 8/9. 

In MU-MIMO transmission:

  • Multiple users are served in parallel over a given time-frequency resource by means of spatial multiplexing.
  • The multiplexing gain scales with the number of transmit antennas, provided there are enough users in the cell.
  • MU-MIMO networks are exposed to strong co-channel interference which is not the case for SU-MIMO ones.

Comparison between SU-MIMO and MU-MIMO

SU-MIMO Vs. MU-MIMO
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