What is MISO and SIMO?
MISO: Multiple input and single output, it's mean multiple transmit antennas and single receive antenna.
SIMO: Single input and multiple output, it's mean single transmit antenna and multiple receive antennas.
You know, Space - Time Coding is a type of code to increase the channel capacity or provide the diversity gain, which we want to use, we must have at least 2 transmit antennas.
With 1 transmit antenna we can't use space-time coding for the channel.
So, I really believe that MISO system is better than SIMO system!
Added after 5 hours 42 minutes:
My opinion is only right in case of using Space-time coding! ^^.