Performance Analysis of Spectrum and Energy Efficiency in Millimeter-Wave Massive MIMO-NOMA and MIMO-OMA

Authors

  • L. Thulasimani  Electronics and Communication Department, P.S.G college of technology at Coimbatore, Tamil Nadu, India
  • G. Raichal  Dr Mahalingam College of Engineering and Technology at Pollachi, Tamil Nadu, India

Keywords:

mmwave, massive MIMO, NOMA, hybrid precoding, power allocation

Abstract

Non-orthogonal multiple access (NOMA) is multiple access technology that is employed in the fifth-generation (5G) wireless communication systems since, it serve multiple users at same time and frequency. Based on the power level users are differentiated. It offers high energy and spectral efficient communication for growing different quality of service (QoS) requirements. Non-orthogonal multiple access (NOMA) has been recently considered in millimeter-wave (mmWave) due to its massive connectivity. Massive MIMO systems use large number of antenna to improve both the spectrum and energy efficiency. In this paper , we consider mmWave massive MIMO-NOMA system. As mmWave massive MIMO uses hybrid precoding (HP) for downlink to significantly reduce the number of radio-frequency (RF) chains without any performance loss, where hybrid precoding (HP) is a combination of analog and digital precoding. The cluster-head selection algorithm is used to select one user for each beam at first, to reduce error and then the analog precoding is designed according to the selected cluster heads for all beams to improve the array gain . Then, the digital precoding is designed by selecting users with the high channel gain in each beam is to reduce interference. Finally, the maximum sum rate is obtained by optimizing power allocation for mmWave massive MIMO-NOMA . Simulation results show that for the proposed algorithm the HP- based MIMO-NOMA can achieve higher spectrum efficiency by increasing the number of users in each beam and higher energy efficiency compared with other precoding technique in MIMO-OMA.

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International Journal of Scientific Research in Science and Technology

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Published

2021-04-10

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Volume 9, Issue 1, March-April-2021

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Research Articles

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How to Cite

[1]
L. Thulasimani, G. Raichal, " Performance Analysis of Spectrum and Energy Efficiency in Millimeter-Wave Massive MIMO-NOMA and MIMO-OMA, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 9, Issue 1, pp.60-69, March-April-2021.