Collaborative Research: Signal Processing in Wireless Ad Hoc Networking

合作研究：无线自组织网络中的信号处理

• 批准号: 0514938
• 负责人: Hongbin Li
• 金额: $ 15.94万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0514938&HistoricalAwards=false
• 关键词: Collaborative; Research; Signal; Processing; Wireless

Collaborative Research: Signal Processing in Wireless Ad Hoc NetworkingProject AbstractMobile ad hoc networks (MANETs) are highly desirable in areas/situations where base stations are unavailable or too expensive to establish. Lack of infrastructure, intermittent connectivity, and frequent changes in topology due to mobility present significant challenges in the research of MANETs. While most prior efforts were primarily focused on the networking layer, there are compelling reasons supported by recent information theory and signal processing studies which indicate that an integrated approach seeking cross-layer diversity exploitation can lead to more fruitful results. This project follows that path.The objective of this project is to develop a framework of communication, networking, and signal processing techniques for MANETs by exploiting node cooperation at the physical, medium access, and networking layers. Three different but intertwined research directions are involved, Specifically, the first is to develop a distributive modulation theory over wireless relay channels, covering investigation of the characteristics of wireless relay channels, modulation and detection for coherent, differential and non-coherent communications for relay networks, power allocation and placement of relay nodes. The second direction is to develop bandwidth-efficient and delay-tolerant cooperative coding schemes to address several issues that are unique in coded cooperation, including bandwidth expansion caused by repetitive transmissions from relays, node asynchronism due to distributive locations of relays, and scalability (viz., the capability to degrade gracefully when some cooperating nodes that implement a distributive code fail because of fading). The third direction is to explore networking by parallel relays and develop networking protocols that take into account the realistic characteristics of radio signals and provide a flexible framework for diversity exploitation.

协作研究：无线自组织网络中的信号处理项目摘要移动自组织网络(MANET)在基站不可用或过于昂贵的情况下非常受欢迎。缺乏基础设施，时断时续的连通性，以及由于移动性而导致的频繁的拓扑变化，这些都给MANET的研究带来了巨大的挑战。虽然大多数以前的努力主要集中在网络层，但最近的信息理论和信号处理研究表明，寻求跨层多样性开发的综合方法可以产生更丰硕的结果。本项目的目标是通过在物理层、介质接入层和网络层的节点协作，为移动自组网开发一个通信、组网和信号处理技术的框架。具体包括三个不同但又相互交织的研究方向，一是发展无线中继信道的分布式调制理论，包括无线中继信道特性的研究，中继网相干、差分和非相干通信的调制和检测，以及中继节点的功率分配和布置。第二个方向是开发带宽高效和延迟容忍的协作编码方案，以解决编码协作中独特的几个问题，包括由来自中继站的重复传输引起的带宽扩展、由于中继站的分布位置引起的节点异步性以及可伸缩性(即，当实现分布式编码的一些协作节点因衰落而失败时优雅降级的能力)。第三个方向是探索通过并行中继站进行联网，并制定考虑到无线电信号的实际特点并为利用分集提供灵活框架的联网协议。