Umudike Journal of Engineering and Technology

Michael Okpara University of Agriculture, Umudike


ENHANCING 5G NETWORK PERFORMANCE WITH NON-ORTHOGONAL MULTIPLE ACCESS AND MASSIVE MULTIPLE INPUT MULTIPLE OUTPUT
Enebe, C. C.
Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike Abia State, Nigeria.

Agwu, E. O.
Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike Abia State, Nigeria.

Idigo, V. S.
Department of Electrical and Electronic Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

Nnebe, U. S.
Department of Electrical and Electronic Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.



ABSTRACT

This paper focuses on improving the 5G networks using the Non-Orthogonal Multiple Access (NOMA) and massive Multiple Input Multiple Output (mMIMO) techniques with the aim to enhance its spectral efficiency, reliability, and latency. The study involved real-time measurements of Reference Signal Received Power (RSRP) New Radio-Secondary Cell Group Uplink (NR-SCG UL) during drive tests conducted to appreciate the already exiting 5G network. The data was collected from an MTN 5G Base Station (BS) situated at longitude 6.43166 and latitude 3.45142 in Eti Osa Oniru Estate, Lagos. Drive tests were performed to collect data on reference signal received power and other key performance indicators. The experiment compared Non-orthogonal Multiple Access (NOMA) with Orthogonal Multiple Access (OMA) schemes in terms of spectral efficiency, reliability, and latency. Both Gaussian and fading channels were considered. NOMA consistently outperformed OMA across various scenarios, regardless of user priority or the number of retransmissions. Specifically, MIMO-NOMA achieved better performance than MIMO-OMA. At a transmit power of 20dBm, MIMO-OMA achieved an achievable sum rate of 20.75bps/Hz, while MIMO-NOMA achieved an achievable sum rate of 23.39bps/Hz. This represents an optimal enhancement of 2.65bps/Hz equivalent to 11.33% improvement in achievable sum rate, demonstrating that NOMA offers significant advantages over traditional OMA approaches in terms of spectral efficiency and overall network performance.


Keywords: Non Orthogonal Multiple Access Scheme, Orthogonal Multiple Access Scheme, 5G, Massive Multiple Input Multiple Output.


https://doi.org/10.33922/j.ujet_v10i2_5
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Published
Wednesday, August 21, 2024
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Vol. 10 No. 2, December 2024
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