Wireless Infrared LANs Using Multi-Beam Transmitters and Imaging Diversity Receivers

建议编号：ECS-9632829首席研究员：约瑟夫·卡恩/加州大学伯克利分校标题：使用多光束发射器和图像分集接收器的无线红外局域网这项研究将集中于开发无线红外局域网，作为短距离无线通信的许多应用的经济的高性能替代方案。无线红外链路中的两个新组件构成了研究的主要焦点(1)多波束发射器和(2)成像分集接收器。用于非定向、非视距链路的发射机，用一组朝向不同方向的窄得多的波束来代替漫射发射机的单个宽波束。通过将路径损耗规律从距离的四次方改变为距离的平方，多波束发射机可以显著降低在非定向非视距链路中所需的发射机功率。成像分集接收器将使用单个光学集中器，例如带有被分割成多个像素的光电探测器的留置器，每个像素都连接到单独的前置放大器。与非成像接收器相比，成像接收器将提供几个关键优势：信号与噪声的空间分辨、宽视场范围内的高光学增益、减少多径延迟扩展和减少同频道干扰。

Proposal Number: ECS-9632829 Principal Investigator: Joseph Kahn/University of California Berkeley Title: Wireless Infrared LANs Using Multi-Beam Transmitters and Image Diversity Receivers Abstract This research will focus on the development of wireless Infrared Local area networks, as an economical high performance alternative to radio for many applications of short range wireless communications. Two new components in wireless infrared links form the main focus of the research (1) multibeam transmitters and (2) imaging diversity receivers. The transmitter, used in non-directed non-line of sight links, replaces the single wide beam of the diffuse transmitter by a collection of much narrower beams that are oriented different directions. By changing the path loss law from the fourth power of distance to the square of distance, the multibeam transmitter can dramatically reduce the transmitter power required in non-directed non-line of sight links. The imaging diversity receiver will use a single optical concentrator such as a liens with a photodetector segmented into multiple pixels, each of which is connected to a separate preamplifier. The imaging receiver will provide several key advantages over the non-imaging receiver: spatial discrimination of signal from noise, high optical gain over a wide field of view, and reduction of multipath delay spread and mitigation of co-channel interference.