Inter Numerology Interference Reduction Using Windowing Technique For OFDM Based Multi-Numerologies

P. Kumar; K. R. Usha Rani

doi:10.6180/jase.202305_26(5).0010

Inter Numerology Interference Reduction Using Windowing Technique For OFDM Based Multi-Numerologies

P. Kumar This email address is being protected from spambots. You need JavaScript enabled to view it.^1,2 and K.R. Usha Rani³

¹VTU Research Centre, RV College of Engineering, Bengaluru
²ECE Dept., Dayananda Sagar College of Engineering, Bengaluru, India
³ECE Dept., RV College of Engineering, Bengaluru

Received: April 12, 2022
Accepted: July 13, 2022
Publication Date: August 16, 2022

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202305_26(5).0010

ABSTRACT

Cyclic Prefix – Orthogonal Frequency Division Multiplexing is undoubtedly the fundamental waveform for the upcoming wireless standards. Mixed / multi-numerology scheme is one of the promising key features for 5G wireless standard, but it suffers from a major problem called Inter Numerology Interference (INI). In this study, we have analyzed the Signal to Interference Ratio (SIR) performance for various Sub Carrier Spacing (SCS) and propose a method to minimize the INI, called windowing technique at transmitter. This work also proposes the concept of power domain Non-Orthogonal Multiple Access (pNOMA / NOMA) and the performance analysis of the same is carried out in the mixed numerology environment. Further, windowing technique is employed to minimise INI. The simulation results presented show the efficacy of the novel methodology that has been proposed.

Keywords: OFDM, INI, SIR, NOMA, SCS, Mixed numerology

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