I.J. Wireless and Microwave Technologies, 2021, 1, 47-62 Published Online February 2021 in MECS (http://www.mecs-press.org/) DOI: 10.5815/ijwmt.2021.01.05 Copyright © 2021 MECS I.J. Wireless and Microwave Technologies, 2021, 1, 47-62 Development of a New Diversity Scheme in 5G Network at 28 GHz Millimter-wave Frequency for Digital Mobile System Akinyinka Olukunle Akande a , Cosmas Kemisdrin Agubor a , Olusola Kunle Akinde b , Longinus Sunday Ezema a , Samuel Okechukwu Okozi a a Federal University of Technology, Owerri, Nigeria b The First Technical University, Ibadan, Oyo State, Nigeria E-mail: akandeoluk@gmail.com Received: 21 November 2020; Accepted: 10 January 2021; Published: 08 February 2021 Abstract: This paper presents an improved hybrid Equal Gain Combiner-Maximal Ratio Combiner (EGC-MRC) diversity scheme in 5G millimeter wave (mm-wave) frequency. The term 5G mm-wave refers to the radio frequency spectrum between 24  and 100 . The signal interference is a challenging task in 5G mm-wave frequency, and radio network suffer from co-channel and adjacent channel interference. 5G network deployment depends on large number of antennas, which resulted in signal interference. The conventional receiver’s diversity techniques have high hardware complexity and are characterized by low performance. A new hybrid EGC-MRC diversity scheme was proposed as an improvement on the performance of existing MRC scheme. In achieving this, Probability Density Function (PDF) of the hybrid model was derived using the instantaneous Signal-to- Noise Ratio (SNR) obtained from the output of MRC and EGC diversity schemes. The performance of the developed model was evaluated using Outage Probability (  ) and Processing time (  ) at different SNR with  number of paths. Simulation of the MRC, EGC and hybrid EGC-MRC models were carried out using MATLAB 2018a and the results compared. The output results showed that hybrid EGC-MRC performed better than EGC and MRC by having a lower   and   . This new model has the potential to mitigate network interference, multipath propagation, and hardware complexity in 5G mm-wave frequency. Therefore, the developed model can be deployed by network operators to solve signal interference in 5G network. Index Terms: 5G Network, Diversity Scheme, Hardware Complexity, Multipath fading, Millimeter-wave. 1. Introduction Wireless communication system has experienced rapid growth recently due to lots of services available in mobile radio communication system [1]. Wireless communication systems suffer from multipath propagation effects such as signal attenuation, path loss, multipath propagation, Doppler and delay spread [2]. Fading occurs as a result of the interference between two or more mobile radio signals, which arrives at slightly different times at the receiver. The signal that is being transmitted travel through many paths due to the presence of reflectors and obstruction in the space which results in multipath signal propagation [3]. In this regard, fading compensation is needed to cushion the effect of signal attenuation. Nomenclature 16-QAM 16 Quadrature Amplitude Modulation 4-QAM 4 Quadrature Amplitude Modulation 5G Fifth Generation 8-QAM 8 Quadrature Amplitude Modulation BER Bit Error Rate BPSK Binary Phase Shift Keying CDF Cumulative Density Function EG Equal Gain EGC Equal Gain Combiner LOS Line of Sight MF Matched Filter