Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications with Time-Slot Coding

Abstract

We propose a novel indoor optical wireless communications (OWC) system using few-mode based beam shaping integrating time-slot coding (TSC) scheme to serve multiple users simultaneously. We simulated an indoor OWC system incorporating single-sideband (SSB) 16 quadrature amplitude modulation (16-QAM) modulated signals in a multi-user environment employing few-mode based beam shaping with single-photodetector (PD) and multi-PD reception with maximum ratio combining (MRC), respectively. The results show that for both single-PD and multi-PD receptions, the bit-error-rate (BER) performance can be significantly improved at different positions within the cell and the size of the effective coverage ..