I discussed a master's thesis at the Faculty of Engineering/Wasit University on improving the performance of wireless communication systems that use spatial radiation technology with millimetre waves.

The letter, in which student Ammar Alaa Majid discussed the use of multi-input antennas and multi-output (MIMO) for the 5G network, was also proposed to use millimetre waves that provide a higher frequency range allowing more users to serve and obtain a higher data transmission rate to meet all 5G communication requirements.

The study showed that addressing the problems facing the use of millimetre waves with MIMO systems that cause high energy consumption in addition to the high cost due to the presence of too many radio component chains reduces the concept of (spatial radiation) the number of series of radio components without sacrificing performance. In addition, another problem arises when using the concept above: the limited number of users who can be served within the network. To overcome these challenges, it has been proposed to integrate both spatial radiation technology with the "non-perpendicular multiple access" technology to obtain the new Beamspace-MIMO-NOMA concept where the "non-perpendicular multiple access" technology can serve a group of users , who have connected channels, across the same package using a single radio component series, making the number of users served greater than the number of components of radio chains.

The results of the simulation obtained showed that the proposed energy efficiency scheme was superior to other transmission schemes, as well as near-perfect spectral efficiency compared to the entire digital MIMO system.

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