MIMO-OFDM is being used in many of the communication technologies like WiMAX, WLAN etc. because it has numerous advantages over previous techniques. Following are the advantages of MIMO-OFDM:  · ROBUSTNESS:The major advantage of MIMO-OFDM is its nature of robustness again the multipath propagation.
And that is a very good factor to be implemented in a wireless systems for a better data communication.· CYCLIC PREFIX:The main of the MIMO-OFDM introduction is cyclic prefix, it make the systems more resistance able towards the time dispersion. Cyclic prefix help system to overcome the problem of Inter-Symbol Interference (ISI). It is just replicable for guard band for the multipath propagation.· ACCOMPLISHING:There are n numbers of narrowband channels in aMIMO-OFDM channels so these Txs numbers of channels are easily accomplished as compare to the Tx number of channel. This means it is not affected by the numbers of channels.· HIGH BITRATE:The benefit of MIMO-OFDM can be notable is its very high transmission rate as compare to the other transmission technologies. This is accomplished with the help of closely spaced multiple channels.
· NO WASTING OFDATA: The one of the advantages of the MIMO-OFDM is if the data stream are affected by fading then that faded data stream can be deleted to save to rest of data. 1.1 DISADVANTAGES OF MIMO-OFDM:As there are some benefits of MIMO-OFDM there are also some drawbacks or disadvantages of MIMO-OFDM which are.
 · HIGH POWER RATE: In MIMO-OFDM the high peak to the average power ratio is required which is the major of the drawback of MIMO-OFDM. As it will consume a lot of energy to be used in the system.· HIGHSYNCHRONIZATION ACCURACY:In MIMO-OGDM the main point is synchronization of orthogonal signals if it is not synchronized then it can destroy the whole signal, which cause the interference in the signal.
Phase noise error or the presence of Doppler effect can cause the degradation to the MIMO-OFDM system.· MULTIPATHPROPAGATION:In MIMO-OFDM it is affected by the multipath propagation so it is must effect the data stream transmission at both ends. And it affects alots.