Channel modeling of nondirected wireless infrared indoor diffuse link

This paper discusses the modeling and broadband design of an indoor infrared wireless communication channel consisting of a nondirected diffusion system. The property of the nondirected diffuse link is analyzed by the ray tracing technique and the modified Monte Carlo method. The physical parameters are directly related to the impulse response of the link and are modeled by a gamma probability density function. The impulse response model and a simulation indicate that it is effective for the broadband link to narrow the radiation angle of the optical source and to expand the receiver field of view to match the ceiling area of the room.