College of Engineering, Mustansiriyah University discussed a Ph.D. thesis on the role of multiple-input-output technology in improving the effectiveness of the fifth generation and meeting the increasing communications needs in the future by the postgraduate student, Mr. Azhar Hussein Ne'ma.

The thesis aimed at demonstrating the effectiveness of using MIMO signal technology in communications systems to improve performance by building multiple antennas on both the transmitter and receiver according to improve capacity, reduce interference and take advantage of multipath.

The thesis highlighted that the rapid development of wireless communications technology requires higher data transfer rates, more efficient use of the spectrum, and greater reliability of the communication system, through the use of massive MIMO systems technology that rely on hundreds of antennas at each base station to serve dozens of users simultaneously, as well as building a detector for massive MIMO signals represents a major challenge due to the computational complexities resulting from the large number of antennas, users, and associated base stations, which leads to a poorly adapted system, as the received signal may not be modified using the matrix inversion.

The thesis concluded that the proposed techniques showed superior performance over traditional iterative methods in terms of signal detection, monte Carlo simulations demonstrated that the proposed detectors achieve near-ideal performance, while reducing complexity from O(〖N_T〗^3 to O(〖N_T〗^2) and reducing the number of iterations required, outperformed existing systems sensitive to high modulation orders and the proposed detectors also performed well in non-ideal