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、推动带宽需求超过竞争技术（例如，电缆和DSL）容量的消费产品的采用，以及客户利用FTTH服务以经济有效地满足所有带宽需求的消费设备的能力。特别是，随着越来越多的基于视频的互联网内容的普及，高清晰度电视（HDTV）的普及正在推高带宽需求，IPTV即将出现。消费者订阅极高带宽服务的意愿取决于是否有能力为分布在整个住宅中的多台电视和电脑提供服务，而无需普遍的高速局域网布线。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，为多个，同时高清视频和/或高比特率的互联网传输。超宽带（UWB）有足够的带宽（bbb500mb /s），但覆盖的范围是房间而不是家庭。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，我们寻找一种利用光传输获得技术和成本优势的系统解决方案，允许服务提供商将FTTH内容传输与家庭无线分发捆绑在一起。考虑到监管环境，我们的目标是将超宽带范围扩展10倍，这尤其具有挑战性。超宽带信号被限制在极低的功率；通过这种方式，它们可以获得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。我们在脉冲整形中寻求功率效率的提高，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和利用现有的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.