A new design of devices and links configuration for indoor optical wireless communications

This thesis states a new device and links configuration design for optical wireless communications system applied to indoor use, which is aimed to create a reliable ‘blocking-free’ communication connections. This work firstly investigates the essential characteristics of optical indoor channels, and manages a number of simulations based on a model of scenario for the channel response research. Modulation technique also is discussed and selected by studying and simulating the various modulation schemes for optical wireless communications system design, and the 4-PPM modulation technique in the end is selected as the suitable scheme for this work. Space-time Coding for optical wireless communications is proposed associated with the 4-PPM modulation scheme, which is orthogonal for OMIMO system signal arrangement. The whole scheme of device design and configuration links is described, and the work procedure is also illustrated by an implementation of demonstrator for experiments.