Author(s)

Shamim Al Mamun, M. Shamim Kaiser, Muhammad R Ahmed, Md. Shafiqul Islam, Md. Imdadul Islam

Department of Computer Science of Engineering, Jahangirnagar University, Savar, Bangladesh.
Department of Physics, Jahangirnagar University, Savar, Bangladesh.
Institute of Information Technology, Jahangirnagar University, Savar, Bangladesh.
School of Information Technology & Engineering, University of Canberra, Australia.

The spot-diffusing technique provides better performance compared to conventional diffuse system for indoor optical-wireless communication (OWC) system. In this paper, the performance of an OW spot-diffusing communication system using Neuro-Fuzzy (NF) adaptive multi-beam transmitter configuration has been proposed. The multi-beam transmitter generates multiple spots pointed in different directions, hence, forming a matrix of diffusing spots based on position of the receiver and receiver mobility. Regardless of the position of the transmitter and receiver, NF controller target the spots adaptively at the best locations and allocates optimal power to the spots and beam angle are adapted in order to achieve better signal-to-noise plus interference ratio (SNIR). Maximum ratio combining (MRC) is used in the imaging receiver. The proposed OW spot-diffusing communication system is compared with other spot-beam diffusion methods proposed in literature. Performance evaluation revels that the proposed NF based OW spot-diffusing communication system outperforms other spot-beam diffusion methods.

Optical-wireless Communication; Spot Diffusion Technique; Neuro-fuzzy; Imaging Receiver; Adaptive Power Allocation

Mamun, S. , Kaiser, M. , Ahmed, M. , Islam, M. and Islam, M. (2013) Performance Analysis of Optical Wireless Communication System Employing Neuro-Fuzzy Based Spot-Diffusing Techniques. Communications and Network, 5, 260-265. doi: 10.4236/cn.2013.53B2048.