Multiple-Input, Multiple-Output is a technology that uses multiple antennas on both the sides of a transmitter and a receiver.Frequency signals usually reflected by the objects found in their way generating the phenomenon as multiple path. MIMO uses a technique called spatial multiplexing that transmit multiple data streams at the same frequency, but through different spatial channels.MIMO take transmission over multiple channels and converts from a shortfall in benefit. MIMO make a channel more effective.MIMO WLAN equipment sends two or more radio signals to multiple antennas, and "multiple-output" means that two or more radio signals to several antennas, and "multiple-output" means that two or more radio signals coming From.multiple antennas and reach the equipment.
MIMO is a significant innovation and a technology which has been adapted to work for a few more wireless standards beside 4G standards. MIMO uses a technique called spatial multiplexing to transport two or more data streams simultaneously on the same frequency channel.Generating multiple spatial streams requires multiple transmitters and receivers and different ways,each stream that is sent through the environment. Multiple paths can be obtained using polarized antennas or multiple paths in channel. Multiple paths are a common phenomenon in wireless channels, where the signal is reflected by walls and objects. Reflections that combine distorts the signal receive.MIMO multi- transmitters use multi-paths as advantage. Receivers in MIMO systems are able to process information very well from each multi-path, removing the mixture of components out of phase which sometimes produce distortions in the signal. A MIMO system has a certain number of transmitters and a certain number of receivers. The signal from each of the transmitters can reach each of the channel receivers on different channels. MIMO works best if these paths are distinct spatial, resulting in reception of signals that are uncorrelated. Multi-paths helps channels decorrelation, and thus increase the efficiency of spatial multiplexing.
