High capacity optical wireless systems

无线电频谱正变得高度拥挤，这限制了网络运营商推出新服务的能力。一个潜在的解决方案是使用光谱。红外波长的光无线通信提供了许多优点。这些包括丰富的不受监管的频谱、不受信号衰落的影响、物理层的安全性(因为光信号不会穿透不透明的墙壁)，以及因此能够在相邻房间中重复使用相同的波长。然而，这些光无线系统受到许多限制，包括导致脉冲扩展和降低可实现的数据速率的多径传播；以及由于日光和人工光源而受到的干扰。该项目将解决这些障碍，并将评估大容量光纤无线网络的潜力以及最佳网络架构和协议。

The radio frequency spectrum is becoming highly congested which limits the network operators' ability to introduce new services. A potential solution is to use the optical spectrum. Optical wireless communication at the infrared wavelengths offers a number of advantages. These include an abundant unregulated spectrum, freedom from signal fading, security at the physical layer as optical signals do not penetrate opaque walls and the ability therefore to re-use the same wavelengths in adjacent rooms. These optical wireless systems however suffer a number of limitations including multipath propagation which results in pulse spread and reduces the achievable data rate; and suffer from interference due to day light and artificial lighting sources. This project will address these impairments and will evaluate the potential of high capacity optical wireless networks and optimum network architectures and protocols.