Which of the following is similar to MIMO?

multiple-input and multiple-output- the use of multiple antennas at both the transmitter and receiver to improve communication performance. It is one of several forms of smart antenna technology.

Cooperative diversity is a cooperative multiple antenna technique for maximizing total network channel capacities for any given set of bandwidths which exploits user diversity by decoding the combined signal of the relayed signal and the direct signal in wireless multihop networks