首页> 外文会议>Conference on Optical Wireless Communications III 6-7 November 2000 Boston, USA >Wireless infrared indoor communications: how to combat the mutli-path distortion
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Wireless infrared indoor communications: how to combat the mutli-path distortion

机译:无线红外室内通信:如何应对多路径失真

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摘要

Currently, higher and higher transmission speeds are being pursuit for wireless LANs. The present investigation deals with one of the most prospective candidates for high-speed in-house wireless communications, namely, Multi-Spoot Diffusing Configuration (MSDC). Since it uses optical optical medium for data transmission, it posskesses inherent potential for achieving very high capacity level. Channel characteristics in MSDC are simulated and the causes for channel distortion are analyzed. Then, conditions for creation of a virtually ideal channel are derived. It is shown that the 3dB-channel bandwidth can be extended up to frequencies beyond 2GHz. The large bandwidth comes at the cost of poor power efficiency. In order to compensate for this, a novel receiver optical front-end design is proposed and its performance is analyzed. Taking advantage of unique properties of holographic optical elements, conventional optical front-end consisting of a concentrator and a filter, is replaced by a single holographic curved mirror. Utilization of such a holographic optical element improves the signal-to-shot noise ratio by up to 18.5dB.
机译:当前,无线LAN正在追求越来越高的传输速度。本研究涉及高速内部无线通信的最有希望的候选者之一,即多点扩散配置(MSDC)。由于它使用光学光学介质进行数据传输,因此具有实现很高容量水平的内在潜力。模拟了MSDC中的信道特性,并分析了导致信道失真的原因。然后,得出用于创建实际上理想的信道的条件。结果表明,3dB的信道带宽可以扩展到超过2GHz的频率。大带宽是以低劣的电源效率为代价的。为了弥补这一点,提出了一种新颖的接收机光学前端设计,并对其性能进行了分析。利用全息光学元件的独特性能,由集中器和滤光器组成的常规光学前端被单个全息曲面镜所取代。这种全息光学元件的使用将信噪比提高了高达18.5dB。

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