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6 December 2002 Indoor infrared wireless communication system based on Ethernet network
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Proceedings Volume 4873, Optical Wireless Communications V; (2002)
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States
In this paper, we present an infrared wireless indoor communication system that bases on Ethernet network. The bit rate of Ethernet is 10Mbps, but after Manchester coding, in the physical layer the actual bit rate is 20Mbps. In our designs, the transmitter uses laser diodes (LDs). The transmitter consists of differential input circuit, LD driver circuit. The receiver consists of a coated truncated spherical concentrator whose field of view (FOV) is 40 degree, a large area Si PIN photo-detector followed by transimpedance amplifier, second-stage amplifier, low-pass filter (LPF), high-pass filter (HPF), limiting amplifier and differential output circuit. The network is constructed as a base-terminals configuration and two transit wavelengths are used for base and terminals respectively to avoid collision. Experimental testing was conducted in a room with size 5m × 5m × 3m and the network could work well.
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Xin Yang, Mali Gong, Kai Zhang, Haitao Zhang, Ping Yan, Wei Jin, Feng Jiang, Yu Meng, and Shanshan Zou "Indoor infrared wireless communication system based on Ethernet network", Proc. SPIE 4873, Optical Wireless Communications V, (6 December 2002);

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