SGER: Exploiting Motion in Wireless Networks

本项目侧重于无线系统的跨层设计，包括网络协议层、数据链路层和物理链路层。传统上被视为障碍的移动性可以被用来提高无线频谱的使用。在多载波码分多址系统中，通过增加发射信号的结构和利用节点的不同多普勒频移可以实现显著的性能提升。较低三个协议层之间的反馈提供了利用移动无线用户移动所产生的频移的机会，从而减轻了干扰的影响并提高了有效利用率。智力上的功绩。这个项目引入了一种新的方法来利用运动作为无线系统中的附加参数。通过像在ofdm中那样利用频率子带，并在发送信号中添加足够的结构进行处理，可以使用多普勒频移来减少干扰的影响。调查人员的初步工作表明，这一处理是可行的。使用Motion需要以集成的方式设计物理层、数据链路层和网络层协议，并假设计算和位置感知能力将不断提高。将接收信号之间的定时关系用于干扰消除也需要跨层信息，这也是一种日益可行的方法。更广泛的影响。该项目启动了利用移动作为无线频谱优化中可能有益的因素的研究。利用运动而不是补偿运动的潜在好处是非常显著的。这类似于近年来获得如此突出地位的MIMO技术，因为以前被认为不利于性能的因素被转化为积极因素。利用运动需要跨层方法，因为有关运动的信息需要传递到较低的层以增强这些层的处理。这项研究将有助于理解跨层集成设计的好处。此外，这项工作将通过项目计划中包括的学生职位，支持将研究生教育转化为跨层技术。

This project focuses on the cross-layer design of wireless systems, at the network protocol, data link, and physical link layers. Mobility, which has traditionally been viewed as an impediment, can be utilized to improve the use of wireless spectrum. Significant gains in performance can be achieved by adding structure to transmitted signals and exploiting the different Doppler shifts of nodes in multi-carrier code-division multiple-access systems. Feedback among the lower three protocol layers offers the opportunity to utilize the frequency shifts that result from the motion of mobile wireless users, thereby alleviating effects of interference and increasing effective utilization. Intellectual Merit. This project introduces a novel way to exploit motion as an additional parameter in wireless systems. By utilizing frequency subbands as in OFDM and adding sufficient structure to transmitted signals for processing, Doppler frequency shifts can be used to reduce the effects of interference. Initial work by the investigators suggests the processing is feasible. The use of motion requires that the physical, data link, and network layer protocols be designed in an integrated fashion, and assumes that computing and location-awareness capabilities will continue to improve. The use of timing relationships between received signals for interference excision, which also requires cross-layer information, is also an increasingly feasible approach. Broader Impacts. This project initiates research into utilization of motion as a possibly beneficial factor in the optimization of wireless spectrum. The potential benefits of exploiting motion, instead of compensating for it, are very significant. This is analogous to the MIMO techniques that have gained such prominence in recent years, in that factors that were previously believed to be detrimental to performance are transformed into positives. Exploiting motion requires a cross-layer approach, as information on movement needs to be passed to lower layers to enhance processing at those layers. This research will help to understand the benefits of integrated design across layers. Further, this work will support graduate education into cross-layer techniques through the student positions included in the project plan.