An Indoor Optical Wireless System Based on Different Spot Diffusing Geometries and A Diversity Receiver
نویسندگان
چکیده
Abstract: We evaluate the performance of a multi-beam transmitter system in an indoor environment where a diversity receiver is employed. The system’s performance is evaluated under four new multi-line spot diffusing geometries and is compared with the performance of a single line of diffusing spots and with the conventional diffuse system (CDS). The performance is analysed under the influence of background noise produced by artificial ambient light sources and multipath propagation. A three-branch square-based pyramidal diversity receiver is used to optimise reception through a diversity selection scheme. An analysis as well as a comparison of the results obtained for signal delay spread and signal-to-noise ratio (SNR) is presented.
منابع مشابه
Evaluation of An Indoor OW Channel Employing A Mobile Multi-line Multi-Spot Diffusing Transmitter and A Seven Detectors Angle Diversity Receiver
Multiple narrow beams' transmitters have been shown to improve the performance of the indoor optical wireless channels by a remarkable higher signal-to-noise ratio (SNR) and a lower signal delay spread over the conventional diffuse transmitters, especially at weak locations (when the transceivers have the highest separation distance). Further performance improvement is attained through the use ...
متن کاملMulti-line Multi-Spot Diffusing Indoor OW Channel with A 7-Detectors Diversity Receiver
We evaluate the optical gain achieved in an indoor optical wireless (OW) channel when increasing the number of branches of the angle diversity receiver from three to seven. Simulation is carried out for five different spot diffusing geometries as to compare the systems' performance when the square-base three branch angle diversity receiver is replaced by a hexagonalbase and seven-branch design....
متن کاملAssessment of Angle Diversity and Spot Diffusing Techniques in Combating the Multipath Dispersion on Non-directed Diffuse Wireless Channels
Non-directed diffuse optical wireless (OW) channels are mainly impaired by multipath propagation, which results in pulse spread and intersymbol interference (ISI). Ambient light noise, however, is also a notable impairment in indoor systems, and can degrade the system performance. In this paper, we present and investigate a new geometry that uses a line strip spot -diffusing transmitter in conj...
متن کاملPerformance Analysis of Optical Wireless Communication System Employing Neuro-Fuzzy Based Spot-Diffusing Techniques
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 directi...
متن کاملAdaptive Moblile Spot Diffusing Transmiter for an Indoor Optical Wireless System
An adaptive approach is used to adjust the transmit power of each beam in a line strip multi-beam optical transmitter based on information about the quality of the received signal due to each spot. The system assumes a feedback link between the optical transceivers. Diversity detection is employed to combat the degrading effect of the background noise in the channel with a 7detectors angle dive...
متن کامل