Collaborative Research: Capacity and Coding in Resource-Limited Wireless Networks

资源受限无线网络中的容量和编码无线网络的性能受网络中可用资源的限制。无线网络使用的基本物理资源是带宽和能量。设计无线网络主要是以尽可能高效的方式利用这些资源的问题。本研究将这两种资源分开考虑，通过一次只关注一种资源来定义带宽限制机制和能量限制机制。在每个方案中，研究人员建议集中于与Shannon容量相关的几个性能指标，找到这些指标的界限，并设计实用代码来接近这些界限。分开处理这两种资源在许多情况下可以获得简洁、准确的容量结果，而不是数字上界和下界。具体地说，本研究的目的是1)找到资源受限无线网络性能的基本界限，2)提出网络容量确定性的新概念，3)直接将所获得的信息论结果用于指导实际的码设计，4)在码设计中使用源-信道编码，5)将源-信道编码方法扩展到具有相关信源的网络。

Capacity and Coding in Resource-Limited Wireless NetworksPerformance of wireless networks is limited by the resources available in the network. The fundamental physical resources used by wireless networks are bandwidth and energy. Designing wireless networks is mainly a question of utilizing these resources in the most efficient way possible. This research considers the two resources separately and defines the bandwidth limited regime and the energy limited regime by focusing on one resource at a time. In each regime, the investigators propose to concentrate on a few measures of performance related to the Shannon capacity, find bounds for these measures, and design practical codes to approach these bounds.Treating the two resources separately makes it possible in many cases to obtain concise, exact capacity results rather than numerical upper and lower bounds. Specifically, this research aims to 1) find fundamental bounds for performance of resource-limited wireless networks, 2) develop a new concept of deterministic capacity of networks, 3) use obtained information-theoretic results directly in guiding practical code designs, 4) employ source-channel coding in code designs, and 5) extend the source-channel coding approach to networks with correlated sources.