Extending the reach of high bit rate UWB - from FTTH to household LAN

光纤到户（FTTH）的采用受许多因素影响：部署成本、设备成本、基础设施成本、消费产品的采用，这些消费产品推动带宽需求超过竞争技术（例如，电缆和DSL）容量，以及客户端经济高效地利用FTTH服务以满足所有带宽需求的消费者设备的能力。特别是，高清电视的普及正在推高带宽需求，越来越多的基于视频的互联网内容也是如此，IPTV即将出现。消费者订阅极高带宽服务的意愿取决于在没有普及的高速LAN布线的情况下向分布在整个住宅中的多台电视和计算机供电的能力。目前的无线标准，如802.11，可以覆盖整个家庭，但没有必要的带宽，多个，巨大的高清晰度视频和/或高比特率互联网交付。超宽带（UWB）具有足够的带宽（>500 Mb/s），但范围覆盖一个房间而不是一个家。该项目致力于增强UWB技术，以实现500 Mb/s或更高的家庭覆盖。更重要的是，我们正在寻找一种系统解决方案，利用光传输来获得技术和成本优势，使服务提供商能够将FTTH内容交付与家庭无线分发捆绑在一起。在监管环境下，我们将UWB范围扩大十倍的突破性目标尤其具有挑战性。UWB信号被限制为极低的功率;以这种方式，它们可以被赋予非常宽的频率覆盖范围（3-10 GHz），从而获得非常高的比特率。因此，系统必须设计为极高的功率效率，同时认识到保持低成本的重要性。我们在脉冲整形方面寻求功率效率增益，以获得最大允许传输功率，并在接收器处进行高级RF和数字信号处理。为了保持低成本，我们将研究新的光源，并利用现有的PON基础设施。

The adoption of fibre to the home (FTTH) is shaped by many factors: cost of deployment, cost of equipment, cost of infrastructure, adoption of consumer products that drive bandwidth demand beyond competing technologies' (e.g., cable and DSL) capacity, and the client's ability to exploit FTTH services cost effectively to feed all bandwidth hungry consumer devices. In particular, the penetration of high definition television (HDTV) is pushing up bandwidth demand, as is increasingly video-based Internet content, with IPTV looming on the horizon. The willingness of consumer to subscribe to extremely high bandwidth services hinges on the capacity to feed the multiple televisions and computers distributed throughout a dwelling without pervasive, high speed LAN cabling. Current wireless standards such as 802.11 can cover an entire household, but do not have the requisite bandwidth for multiple, simultane-ous high-definition video and/or high bit rate Internet delivery. Ultra-wideband (UWB) has sufficient bandwidth (>500 Mb/s), but range that covers a room rather than a home. This project addresses the enhancement of UWB technology to achieve home-wide coverage at 500 Mb/s or greater. More importantly, we search for a systems solution that exploits the use of optical transport to gain technological and cost advantages, allowing service providers to bundle FTTH content delivery with in-home wireless distribution. Our aggressive goals for a breakthrough ten-fold extension of UWB range are particularly challenging given the regulatory environment. UWB signals are constrained to be extremely low power; in this way they can be accorded tremendously wide frequency coverage (3-10 GHz), and thus attain very high bit rates. Therefore systems must be designed for extreme power efficiency, while recognizing the importance of keeping cost low. We seek our power efficiency gains in pulse shaping to attain maximally-allowed transmission power, and in advanced RF and digital signal processing at the receiver. To keep cost low we will examine new optical sources and exploit the available PON infrastructure.