Gigabit wireless network design for HDTV broadcast, multimedia & industrial services

认识到向无线无处不在的发展是不可避免的，我们的目标是通过提出的研究工作来开发和评估可行的系统替代方案和通信技术，以实现下一代无线接入和无线网络设备。这些设备将在数据速率、服务质量、安全性以及对干扰和入侵的免疫力方面提供比当前无线局域网（WLAN）更好的替代方案。我们预计这些替代方案将在本十年末之前为无线局域网和第四代（4G）无线技术带来新的解决方案和标准。在不久的将来，我们将拥有无线网络，在企业和校园中不再需要以太网布线和繁琐的布线柜。无线设置盒将把多个高清电视频道从家中传送到电视监视器上，多跳无线网状网络将在会议中心、机场、高速公路等任何地方以低成本或免费的方式提供互联网和语音接入。我们提出了一个新的强大的框架，用于未来的WLAN接入点和空中接口，可以使用软件定义无线电（SDR）方法实现。该框架将结合多天线或MIMO（或多输入、多输出）系统与正交多载波（MC-）CDMA系统的优势。这种框架的优点是：MIMO技术提供的高数据速率，使用正交载波的高频谱效率和低多径失真，以及来自CDMA的干扰抑制。考虑到在高数据速率下解决这些问题的难度要高得多，因此必须考虑许多系统比较和权衡。我们的方法的独特之处在于它强调跨层交互和优化，以及开发软件定义或可编程的PHY系统设计策略。

Recognizing the inevitable evolution towards wireless ubiquity, we aim through the proposed research effort to develop and evaluate viable system alternatives and communication techniques for realizing next-generation wireless access and wireless networking devices. Such devices will provide a much improved alternative to current wireless local-area networks (WLAN) in terms of data rates, quality-of-service, security, and immunity to interference and intrusion. We anticipate such alternatives to bring about new solutions and standards for the wireless LANs and 4th Generation (4G) wireless technology before the end of the decade. In the near future, we will have wireless networks eliminating the need for Ethernet cabling and cumbersome wiring closets in the Enterprise and campuses. ireless setup boxes will beam multiple HDTV channels across the home to TV monitors, and multi-hop wireless mesh networks will make Internet and voice access available at low or no-cost anywhere in convention centers, airports, along highways, etc. We propose a new powerful framework for future WLAN access points and air interfaces that can be implemented using a software-defined radio (SDR) approach. This framework will combine the advantages of multiple-antennas, or MIMO (or multi-input, multi-output) systems, with orthogonal multi-carrier(MC-)CDMA systems. The benefits of such framework for are: high data rates provided by MIMO techniques, high spectrum efficiency and lower multipath distortion using orthogonal carriers, and interference rejection from CDMA. Considering that the difficulty in solving these problems is much higher for high data rates, there are a number of systems comparisons and tradeoffs which must be considered. The distinguishing aspect of our approach is its emphasis on cross-layer interaction and optimization, and on developing a software-defined or programmable PHY system design strategy.