Increase Spectral and Energy Efficiency with Multi-Objective Optimization for 5G-NR Terrestrial Broadcasting

Abstract

5G-New Radio (5G-NR) technology is considered for a new mobile communication system. One of the most important services that provide an extra-advantage is terrestrial broadcasting for mobile systems. Previously, this service was handled by further evolved multimedia broadcast multicast service (FeMBMS) on the basic guidline of the Long Term Evaluation (LTE). Digital terrestrial television systems (DVB-T2) via single frequency networks (SFN) signals with orthogonal division multiplexing (OFDM) modulation are used to provide unicast/multicast/broadcast services for mobile systems. Terrestrial High Power High Tower (HPHT) broadcast transmitters and 5G mobile low power and low tower (LPLT) stations in mobile-cells can be rescheduled to reduce power consumption. The 5G-NR pre-license frequency band (in the UHF band) can be reused to broadcast data with TDM with the existing procedures like synchronization and standards for mobile communication technologies. In this article, a novel method is suggested to improve performance of the spectral efficiency (SE) and energy efficiency (EE) based on the optimization of the signal cyclic prefix (CP), symbol duration, and antenna gains for any SFN transmitters. All system parameters are chosen based on the real system and propagation standard ITU-R P.1546-5 at different with high-speed users. The simulation results demonstrate the proposed method for 5G-NR broadcasting achieves higher SE and EE around 12.5% and 40%, respectively. It means the proposed technique can maximize SE and EE by a sufficient CP, antenna gain and appropriate symbol duration.