Higher Order QAM Schemes in 5G UFMC system

Abstract

To meet the prerequisites and parameters in 5G, the existed Orthogonal Frequency Division Multiplexing (OFDM) modulation technique is not enough. So, an alternate technology called Universal Filtered Multi Carrier (UFMC) technique arisen. It is a 5G modulation technique. For UFMC, to withhold an orthogonality, Quadrature Amplitude Modulation (QAM) is being used and also suits for Multiple Input Multiple Output (MIMO) technology. This document describes the performance of UFMC modulation technique. In this paper we have chosen 256 bit and 1024-bit QAM Mapping technique. In simulation results, we observed the Peak to Average Power Ratio (PAPR) values of 256-bit QAM and 1024-bit QAM and it is implicit that the PAPR values in 1024-bit QAM have the low PAPR values. So, the best mapping technique in UFMC is 1024-bit QAM. In this article, we also evaluated UFMC's performance based on PAPR and spectrum utilization. And all the PAPR and (Bit Error Rate) BER values for both 256-bit and 1024-bit QAM are also included. The systems which are based on OFDM technique are vulnerable to high power amplifiers (HPA). Also due to multi carrier signal overlapping, the 4G OFDM technique suffers from high PAPR. The high PAPR causes a non- linear distortion in HPA. And we concluded that UFMC multi carrier technique also have high PAPR values, which implies to the high-power consumption.