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

光纤到户(FTTH)的采用受到许多因素的影响：部署成本、设备成本、基础设施成本、推动带宽需求超出竞争技术(例如电缆和DSL)容量的消费产品的采用，以及客户经济高效地利用FTTH服务来满足所有带宽需求的消费设备的能力。特别是，随着IPTV的出现，高清晰度电视(HDTV)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。消费者订阅极高带宽服务的意愿取决于为分布在住宅中的多台电视和计算机供电的能力，而不需要普遍的高速局域网布线。当前的无线标准(例如802.11)可以覆盖整个家庭，但不具备同时传输多个高清晰度视频和/或高比特率互联网所需的带宽。超宽带有足够的带宽(&gt；500Mb/S)，但范围覆盖房间而不是家庭。该项目致力于增强超宽带技术，以实现500Mb/S或更高的家庭覆盖。更重要的是，我们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，允许服务提供商将FTTH内容交付与家庭无线分发捆绑在一起。考虑到监管环境，我们的突破性目标是将超宽带范围扩大十倍，这一目标尤其具有挑战性。UWB信号被限制为极低功率；通过这种方式，它们可以被赋予极宽的频率覆盖(3-10 GHz)，从而获得非常高的比特率。因此，系统的设计必须达到极高的能效，同时认识到保持低成本的重要性。我们在脉冲整形中寻求功率效率提升，以获得最大允许的传输功率，并在接收器处进行先进的射频和数字信号处理。为了保持低成本，我们将研究新的光源，并开发现有的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.