Current Volume 10
Application of Multiple Antenna Non-Orthogonal Multiple Access (Noma) Technique in Wireless Communication
Abstract
A multiple antenna Non-Orthogonal Multiple Access (NOMA) model has been applied to wireless communication system. A trans-user downlink wireless communication system performance analysis was extensively performed by matlab simulation. The simulations were evaluated in terms of three performance metrics namely, Bit error rate (BER) against transmit power (dBm), achievable sum rates and outage probability. The results from the simulations conducted in terms of BER against transmit power in dBm, revealed that the near user equipment (UE-1) has better performance (BER of 2.0e-6) than the far user equipment (UE-2) (of BER =2.4e-5) at 40dBm with distance of UE-2 from the base station (BS) equal to 500m. Further simulation by reducing the distance of the UE-2 to 300m showed that the BER of both users improves such that UE-1 has 0, while for UE-2, it was 3e-6 at transmit power of 40dBm. The achievable sum rate curve of multiple-input multiple-output-NOMA system revealed that it increases exponentially as the transmit power increases such that the outcome was a value of 20.75 bps/Hz at transmit power of 40dBm. Further simulation of achievable sum rates of UE-1 and UE-2 indicated that the near user has a value of 18.75 bps/Hz as against 1.999 bps/Hz for the far user. This performance was achieved when the distance of the UE-2 equal to 500m. With the distance of UE-2 equal to 300m, the achievable sum rates of UE-1 and UE-2 were 18.75 bps/Hz and 2 bps/Hz respectively. Hence, with these results for different distances of UE-2 from the BS revealed that distance of user does not significantly influence achievable sum rate performance. In terms of outage probability, UE-1 has 8e-6 while that of UE-2 was 2.3e-5 at transmit power of 40dBm respectively. Since the outage probability is used as a measure of the quality of service (QoS) of user, it means UE-1 has better QoS. In addition, performance of the MIMO-NOMA was compared with MIMO-orthogonal multiple access. Results revealed that the MIMO-NOMA downlink system outperformed the MIMO-OMA in terms of achievable sum rate and outage probability as the system can be used for 5G network application.
Keywords
Non-Orthogonal Multiple Access, Multiple Antennas, Achievable Sum Rate, MIMO-NOMA, Outage Probability
Citations
IRE Journals:
Muoghalu, C. N., Mbachu C. B., Achebe, P. N., Ibe, U. J. "Application of Multiple Antenna Non-Orthogonal Multiple Access (Noma) Technique in Wireless Communication" Iconic Research And Engineering Journals Volume 10 Issue 1 2026 Page 261-271 https://doi.org/10.64388/IREV10I1-1719454
IEEE:
Muoghalu, C. N., Mbachu C. B., Achebe, P. N., Ibe, U. J.
"Application of Multiple Antenna Non-Orthogonal Multiple Access (Noma) Technique in Wireless Communication" Iconic Research And Engineering Journals, 10(1) https://doi.org/10.64388/IREV10I1-1719454
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