A Hybrid Multicarrier Modulation and Multiplexing Scheme for Beyond 5G Systems

Abstract

The main objective of the wireless industry is to satisfy the ever-growing demands of next-generation communication systems such as higher data rates and high spectral efficiency. The prominent requirement of beyond-fifth-generation (B5G) communications is to connect millions of devices around the globe to the internet for smart radio access. Besides, the spectrum allocation and the data rate improvement for B5G networks is a challenging task. This manuscript focuses on the performance enhancement of the existing physical layer design framework for B5G networks. The proposed system exploits a hybrid combination of generalized frequency division multiplexing (GFDM) and non-orthogonal multiple access (NOMA) with the multiplexing scheme in space (MS) to improve the system performance. The simulation results validate the superior performance of the proposed system in terms of enhanced data rate, sum rate, and capacity compared to the conventional GFDM-NOMA systems. More specifically, the proposed GFDM-NOMA with MS achieves a performance improvement of around 1Gbps in data rate compared to the existing system. Finally, the proposed system performance proved to be a suitable candidate for the internet of things (IoT) and device-to-device (D2D) applications in B5G communications.