CAREER: A Network Information Theoretic Approach to Wireless Ad-hoc and Sensor Networks

随着无线通信理论、技术和应用的不断发展，下一代无线通信系统的前景是在任意结构的网络中，在具有挑战性的物理层条件下，使用无线设备进行任意相关数据的通信，这些无线设备在发送/接收能力和协议栈层之间的边界方面更加灵活。本研究的目标是建立一个综合的信息理论框架，用于确定此类网络的最终容量限制，并开发用于此类网络的有效编码、传输、接收和解码方案。本研究探讨一般ad-hoc多跳无线网络的基本网络结构的容量区域和容量实现发送/接收编码/解码方案，其中强调的干扰信道。本研究开发了相关和通用数据通信的原则。具体而言，调查确定最佳的编码和传输schemesfor相关/共同的数据，并研究性能和复杂性之间的权衡，特别是，在性能的损失时，源-信道分离的原则是强制执行。本研究开发了新的工具，并对现有的一些工具进行了集成和联合优化，重点是用户协作和功率控制的联合优化.本研究将无线通信信道的衰落特性整合到所有的问题公式中。信道中衰落的存在可能是挑战性的，也可能是偶然的，如果仔细地利用它来提高网络容量，则后者更是如此。该算法将信道衰落的存在纳入容量评估（因此，遍历和中断容量），纳入共同/相关数据的编码和传输方案，以及工具的开发。

With the recent advances in theory, technology and applications ofwireless communications a vision of the next generation wirelesssystems arises to be that of communicating arbitrarily correlateddata, in arbitrarily structured networks, in challenging physicallayer conditions, using wireless devices that are more flexible interms of their transmitting/receiving capabilities and in terms of theboundaries between the layers of their protocol stack. The goal ofthis research is to develop a comprehensive information theoreticframework for determining the ultimate capacity limits of suchnetworks and for developing efficient coding, transmission, receptionand decoding schemes to be used in such networks.The research is structured into four heavily interrelated parts:network, data, tools, and channel. This research investigates thecapacity regions and capacity achieving transmit/receivecoding/decoding schemes of basic network structures that are buildingblocks of general ad-hoc multi-hop wireless networks, with an emphasison the interference channel. This research develops principles ofcommunicating correlated and common data. Specifically, theinvestigator determines the optimum coding and transmission schemesfor correlated/common data and also studies the trade-offs betweenperformance and complexity; in particular, the loss in performancewhen the source-channel separation principle is enforced. Thisresearch develops new tools and integrates and jointly optimizes someof the existing tools; the emphasis is on the joint optimization ofuser cooperation and power control. This research integrates thefading nature of the wireless communication channel into all of theproblem formulations. The existence of fading in the channel can beboth challenging and fortuitous, more the latter, if it is carefullyexploited to the advantage of the network capacity. The investigatorincorporates the existence of the channel fading into the capacityevaluations (hence, ergodic and outage capacities), into coding andtransmission schemes for common/correlated data, and also into thedevelopment of the tools.------------------