Research PaperOpen Access

Low Complex Analog Beamforming Design in Multi-User mmWave Non-Orthogonal Multiple Access (NOMA)

Department of Electronics and Communication Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru 560035, India

E-mail Address: [email protected]

Corresponding author.

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T. K. Ramesh

Department of Electronics and Communication Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru 560035, India

E-mail Address: [email protected]

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, and

Zhiguo Ding

Department of Electrical and Electronic Engineering, University of Manchester, Manchester, UK

Department of Electrical Engineering and Computer Science, Khalifa University, Abu Dhabi, UAE

E-mail Address: [email protected]

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https://doi.org/10.1142/S0218126623502195Cited by:2 (Source: Crossref)

Abstract

In this paper, we investigate non-orthogonal multiple access (NOMA) scheme in millimeter wave (mmWave) communication to serve nonclustered multiple users. We explore a low complex design of an analog beamforming weight vector and the power requirement of users aiming to minimize the total power targeting to satisfy the spectral efficiency (SE) requirements of all users. We propose a low complex constant modulus analog beamforming (CMAB) algorithm, where we first reduce the number of signal to interference plus noise ratio (SINR) constraints, which is attained from the order of equivalent channel gain of users. Then, the nonconvex constraint of constant modulus (CM) is relaxed and semi-definite programming (SDP) is used to solve the problem. Obtained weight vector and power for all users are optimal since the rank of positive semi-definite (PSD) matrix is one. Later, CM constraint is included. Simulation results show that the proposed algorithm requires less power with minimum complexity compared to the existing research, digital beamforming NOMA and time division multiple access (TDMA) for the same SE requirements.

This paper was recommended by Regional Editor Takuro Sato.

Keywords:

References

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Vol. 32, No. 13

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History

Received 20 November 2021

Accepted 18 January 2023

Published: 8 March 2023

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Open Access since September 2023. This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 4.0 (CC BY) License which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Low Complex Analog Beamforming Design in Multi-User mmWave Non-Orthogonal Multiple Access (NOMA)

Abstract

References

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