MIMO (Multiple Input Multiple Output) systems are a type of communication system in which multiple antennas are used at both the transmitter and receiver to improve communication performance. By using multiple antennas, MIMO systems can increase data rates, improve reliability, and enhance overall system capacity. MIMO systems have become an important technology in modern wireless communications, with applications in Wi-Fi networks, cellular networks, and other wireless communication systems. Research in the area of MIMO systems typically focuses on improving the efficiency, reliability, and performance of these systems through techniques such as antenna design, signal processing, and channel estimation.