Syam Sundar 02 02 MultipleInput A crucial component of contemporary wireless communication systems multipleoutput MIMO technology improves spectrum efficiency dependability and data speed MIMO uses several antennas at the transmitter and receiver to take advantage of multiplexing advantages and spatial diversity to increase system capacity and signal quality The three main MIMO techniquesbeamforming spatial multiplexing and spatial diversityeach address distinct performance goals While spatial multiplexing boosts data throughput by sending separate data streams spatial diversity reduces fading effects by sending redundant signals over many pathways By directing signal energy towards the intended receivers in the best possible way beamforming enhances interference suppression and the signaltonoise ratio MIMO is essential to modern standards like WiFi LTE and 5G and is vital to the development of wireless communications This study examines the fundamental ideas advantages difficulties and uses of MIMO systems emphasizing their importance in nextgeneration wireless networks Copyright (c) Journal of Engineering Technology and Sciences. All rights reserved 2026