Transmission Performance of OFDM-based 1024-QAM under Different Types of Multipath Fading Channels

Abstract

Fifth-generation (5G) new radio (NR) supports multiple subcarrier spacings of orthogonal frequency division multiplexing (OFDM) signals. 5G NR also supports 1024-quadrature amplitude modulation (QAM) for 5G allowing to achieve higher peak data rates and improve spectral efficiency. In this paper, we present the transmission performance of OFDM-based 1024-QAM for multiple subcarrier spacings under different types of multipath fading channels, i.e., Rayleigh fading channel in frequency range 1 (FR1), Rayleigh fading channel in FR2, and Rician fading in FR2. Using link-level computer simulations, we clarify the BER performance of OFDM-based 1024-QAM as parameters of coding rates for the subcarrier spacings of 15 and 240 kHz under three types of multipath fading channels based on tapped delay line models.