Evaluation of LTE-based 5G Terrestrial Broadcasting Systems for Mobile Reception Based on Average Mutual Information Analysis

LTE-based 5G terrestrial broadcast, which is standardized in 3GPP Rel-14 and Rel-16, is one of the two technical evolutional-routes of 5G broadcast. In physical layer, the mobile reception performance loss of LTE-based 5G terrestrial broadcast majorly stems from numerology, coded modulation, interleave depth and channel estimation. Among these factors, interleave depth directly affects the mobile reception performance at different speeds, and low-speed mobile reception puts forward higher requirements of interleave depth. In this paper, the typical configuration of LTE-based 5G terrestrial broadcast is selected, and how interleave depth influences the mobile reception performance is revealed based on the analysis of average mutual information (AMI) probability density distribution and outage probability over small-scale Rayleigh fading channels. The analysis results show that the mobile reception performance could be significantly improved by appropriately increasing the interleave depth. Hence increasing interleave depth could be considered for the evolution of LTE-based 5G terrestrial broadcast towards the next generation mobile broadcast systems.