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Novel User Association Scheme Deployed for the Downlink NOMA Systems

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Communication and Intelligent Systems

Part of the book series: Lecture Notes in Networks and Systems ((LNNS,volume 461))

Abstract

Non-orthogonal multiple access (NOMA) is perceived as a crucial methodology used in 5G cellular networks on account of its enhanced spectrum efficiency and the ability to serve multi-users simultaneously. This paper proposes an unprecedented user pairing algorithm to improve the system’s sum rate, by ensuring the significant channel gain difference even in between user pairs having low channel gains. To achieve this, the proposed algorithm first divides the users into two equal number of user groups according to their channel conditions. Then, these two groups are portioned into subgroups based on each user index (even and odd users). Finally, the pairing technique is performed between subgroups. Later, the ‘fragmented power allotment method’ distributes the power among users on each sub-channel with closed-form solutions. As a consequence of achieving these, simulation results validate that the proposed user pairing algorithm strengthens the data rate of the system when compared to orthogonal multiple access (OMA) and the conventional user pairing algorithms.

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Authors and Affiliations

  1. Department of ECE, National Institute of Technology, Warangal, India

    Sunkaraboina Sreenu & Kalpana Naidu

Authors
  1. Sunkaraboina Sreenu
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  2. Kalpana Naidu
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Corresponding author

Correspondence to Kalpana Naidu .

Editor information

Editors and Affiliations

  1. Department of Computer Science and Engineering, Rajasthan Technical University, Kota, India

    Harish Sharma

  2. Institutional Area Narela Delhi, National Institute of Technology Delhi, New Delhi, India

    Vivek Shrivastava

  3. Design and Manufacturing, Indian Institute of Information Technology, Jabalpur, India

    Kusum Kumari Bharti

  4. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore

    Lipo Wang

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Sreenu, S., Naidu, K. (2022). Novel User Association Scheme Deployed for the Downlink NOMA Systems. In: Sharma, H., Shrivastava, V., Kumari Bharti, K., Wang, L. (eds) Communication and Intelligent Systems . Lecture Notes in Networks and Systems, vol 461. Springer, Singapore. https://doi.org/10.1007/978-981-19-2130-8_49

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