An adaptive genetic algorithm method for mobile multi spot diffusing optical wireless systems

Multi-beam spot diffusing optical wireless systems have been shown to offer performance improvement over conventional diffuse systems. In this work, the authors build on the genetic algorithm multi-spot diffuse technique introduced in by adaptively optimising the distribution of transmit power among the spots. Our aim is deliver superior SNR and delay spread results compared to other existing systems in an indoor mobile communication scenario. This paper examines the boundaries of the maximum SNR that can be achieved in an indoor wireless system. It is demonstrated that the SNR can improve by as much as 50 dB compared to conventional diffuse systems and 20 dB compared to the state of the art adaptive systems. The proposed system offers the possibility of adapting the number, pattern and power distribution of the spots as either the receiver or transmitter move.