Benefits of MIMO

As we shall demonstrate with a simple simulation below, the use of multiple transmit and receive antennas can improve the performance of wireless communication systems significantly. The advantages of multiple input multiple output(MIMO) systems can be summarized as

In the simulation below, we analyze how received power in a Rayleigh flat-fading wireless channel changes as the number of antennas are increased at the transmitter and receiver. We observe that the power variation is reduced and power gain is increased as more antennas are employed.

To see the capacity improvement obtained by employing multiple antennas, click HERE.

Power with single transmit/receive antenna system:

Power when 2 transmit 2 receive antennas are employed: