Multiple-Input Multiple-Output Diffuse Optical Local Area Networks

kapil R. Dandekar， Drexel大学该集成系统提案侧重于利用多输入多输出（MIMO）技术开发漫射光局域网（LAN）。MIMO理论利用发射器和接收器的阵列，最初是在射频通信领域构思和发展的，以增加频谱容量和链路鲁棒性。传统的光学系统是点对点的，利用直接的视线连接。然而，当信号被阻塞或系统不对齐时，数据速率受到严重限制。漫射光网络克服了视距通信链路的阻塞和对齐问题，但代价是接收光功率降低和数据速率降低。本项目的智力优势在于在漫射光无线网络测试平台中应用MIMO技术，包括先进的空时编码算法，以克服光功率限制并提高系统的数据速率。设计并构建由红外源、探测器、滤波器和透镜组成的收发模块和漫射光MIMO网络。此外，还将构建一个模块化、软件定义无线电框架的混合系统，协调使用漫射光学和射频收发器，以展示室内局域网应用中提高的能源效率、稳健性和安全性。改进下一代通信网络的“模态多样性”概念将使用拟议的混合系统进行演示。更广泛的影响：这项工作将获得超出既定研究目标的更广泛的影响，因为我们将培养高中学生对科学和工程的兴趣，以及开发研究生跨媒体网络课程。

ECS-0524200Kapil R. Dandekar, Drexel UniversityThis integrative systems proposal focuses on the development of a diffuse optical local area network (LAN) making use of Multiple-Input, Multiple-Output (MIMO) techniques. MIMO theory, utilizing arrays at both the transmitter and the receiver, was originally conceived and largely developed in the realm of radio frequency communications to increase spectral capacity and link robustness. Traditional optical systems have been point-to-point, utilizing a direct line-of-sight connection. However, when the signal is blocked or the system is misaligned, the data rate is severely limited. Diffuse optical networks overcome the blockage and alignment issues of line-of-sight communication links at the cost of reduced received optical power and lower data rate. The intellectual merit of this project involves applying MIMO techniques, including advanced space-time coding algorithms, in a diffuse optical wireless network testbed to overcome optical power limitations and increase the data rate of the system. The transceiver modules and the diffuse optical MIMO network consisting of infrared sources, detectors, filters, and lenses will be designed and constructed. Furthermore, a hybrid system in a modular, software defined radio framework, making coordinated use of both diffuse optical and radio frequency transceivers to demonstrate increased energy efficiency, robustness, and security in indoor LAN applications will also be constructed. The concept of "modality diversity" for improving the next generation communication networks will be demonstrated using the proposed hybrid systems. Broader Impacts: This work will obtain broader impacts beyond the stated research goals, as we will foster an interest in science and engineering among high school students, as well as develop a graduate cross-medium networking course.