Millimeter Wave Communications with OMA and NOMA Schemes for Future Communication Systems
Shaik Rajak1, Chappalli Nikhil Chakravarthy2, Nafisa Nikhath Shaik3, Sunil Chinnadurai4

1Shaik Rajak*, Department of Electronics and Communication Engineering, SRM University,  Amaravati, (Andhra Pradesh), India.
2Chappalli Nikhil Chakravarthy, Department of Electronics and Communication Engineering, SRM University,  Amaravati, (Andhra Pradesh), India.
3NafisaNikhath Shaik, Department of Electronics and Communication Engineering, SRM University,  Amaravati, (Andhra Pradesh), India.
4Sunil Chinnadurai, Department of Electronics and Communication Engineering, SRM University,  Amaravati, (Andhra Pradesh), India.

Manuscript received on September 18, 2020. | Revised Manuscript received on November 03, 2020. | Manuscript published on November 10, 2021. | PP: 68-72 | Volume-10 Issue-1, November 2020 | Retrieval Number: 100.1/ijitee.L80011091220| DOI: 10.35940/ijitee.L8001.1110120
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Millimeter-wave (mm Wave) communications had been considered widely in recent past due to its largely available bandwidth. This paper describes a detailed survey of mm Wave communications with orthogonal multiple access (OMA), non-orthogonal multiple access (NOMA) schemes, physical design and security for future communication networks. mm Wave provides super-speed connectivity, more reliability, and higher data rate and spectral efficiency. However, communications occurring at mm Wave frequencies can easily get affected by interference and path loss. Various schemes such as small cells, heterogeneous network and hybrid beamforming are used to overcome interferences and highlight the prominence of mm Wave in future communications systems. 
Keywords: Millimeter-wave, Non-orthogonal multiple access, Multiple-input multiple-output, Interference, Path loss, Hybrid beamforming, Heterogeneous network.