I want to ask the definition of MIMO(Multi-input Multi-output )
If there are one transmitter and one receiver,each of them has $N$ antennas,$N >1$. So i can say it is a MIMO system.
But if now i have one transmitter with $N$ antennas,$N >1$.And $5$ receivers with single antennas for each,can this still be called MIMO?
I think it should be called MISO,because each receiver just has only one antenna.However,in this paper,it called this system "MIMO" system .