Impact of Nonlinear Distortion with the Rapp Model on the GFDM System

Abstract

The fifth-generation (5G) mobile communication system has various types of applications, with each application requiring different requirements. The characteristic of this system is flexible architecture. Generalized Frequency Division Multiplexing (GFDM) fulfills these requirements. However, as with other multicarrier systems, GFDM is also susceptible to nonlinear distortion due to the High Power Amplifier (HPA). In this paper, we examine the nonlinear distortion effect of the Rapp model on the GFDM system. We investigate 3 parameters namely Bit Error Rate (BER), the signal spectrum, and the Peak Average Power Ratio (PAPR). Simulation results show that PAPR on GFDM is more resistant to nonlinear distortion due to pulse shaping. The PAPR GFDM value with the Rapp Model is around 3dB, better than the Saleh Model. PSD on GFDM has not changed much due to nonlinear distortion, out-of-band (OOB) values from GFDM are still good around -90dB. But, BER performance on GFDM is very bad if given nonlinear distortion, At the time of Eb/No20dB, the BER achieved was less than 10-1.