Inter-Numerology Interference Reduction Based on Precoding for Multi-Numerology OFDM Systems

Abstract

Multi-numerology OFDM systems are a promising technique to multiplex various services and requirements for 5G and beyond. Multiplexing of multiple numerologies in a single frequency band causes the system to lose orthogonality. Due to this, a new kind of interference is introduced into the system known as inter-numerology interference (INI). In this paper, an efficient INI mitigating technique based on precoding is proposed. Simulation results show that with the proposed method, a significant reduction in INI is achieved and overall system performance is improved for multi-numerology OFDM systems.