Single-Input and Single-Output (SISO) is a part of MIMO systems with one transmit antenna and one receive antenna, while MIMO can have more than one transmit antennas and more than one receive antennas.
System Model Edit
In wireless cellular networks, the received signal in SISO is given by
where is the transmit power, is the scalar fading wireless channel, is the scalar transmit signal, and is the scalar noise signal.
Ergodic Capacity Edit
The ergodic capacity of the SISO system is given by
which is achievable throughput without knowing full instantaneous channel state information.