Robust Hybrid Beamforming Scheme - Millimeter-Wave Massive - MIMO 5G Wireless Networks - Engineering Assignment Help

Assignment Task:

Abstract:

Wireless networks employing millimeter-wave (mmWave) and Massive Multiple-Input Multiple-Output (MIMO) technologies are a key approach to boost network capacity, coverage, and quality of service (QoS) for future communications. They deploy symmetric antennas on a large scale in order to enhance the system throughput and data rate. However, increasing the number of antennas and Radio Frequency (RF) chains results in high computational complexity and more energy requirements. Therefore, to solve these problems, this paper proposes a low-complexity hybrid beamforming scheme for mmWave Massive-MIMO 5G wireless networks. The proposed algorithm is on the basis of alternating the minimum mean square error (Alt-MMSE) hybrid beamforming technique in which the orthogonal properties of the digital matrix were designed, and then the MSE of the transmitted and received signal was reduced. The phase of the analog matrix was obtained from the updated digital matrix. Simulation results showed that the proposed hybrid beamforming algorithm had better performance than existing state-of-the-art algorithms, and similar performance with the optimal digital precoding algorithm. 

Keywords: massive MIMO; precoding scheme; hybrid beamforming; mmWave; RF chain 

Introduction 

In recent years, with the development of science and technology, the emergence of new technologies such as virtual reality and autonomous driving is gradually changing the way people live and work. At the same time, the emergence of these new technologies is accompanied by an increase in the traffic of mobile-communication data services, which poses a severe challenge to the bandwidth and transmission rate of wireless-communication systems [1–3]. The future 5G communication system aims to provide users with Gbit/s transmission rates to meet increasing user demands. High transmission rates mean that a sufficient amount of transmission bandwidth is required, and existing spectrum resources are far from meeting Gbit/s transmission requirements. So, researchers turned their attention to millimetre-wave (mmWave) communication technology, and 5G networks are being powered by this new technology.

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