应用于无线传感器网络的低时延分布式信源编码及延伸性研究

项目名称： 应用于无线传感器网络的低时延分布式信源编码及延伸性研究

项目编号： No.61301181

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 陈雪晨

作者单位： 中山大学

项目金额： 24万元

中文摘要： 无线传感器网络广泛用于各行各业，比如军情检测，灾害控制，大型工业园区的环境检测等等。在这些场合中，1)常常会有很高的时延要求，2)鉴于传感器构造往往简单，希望各传感器节点处的编码过程简单，对记忆空间的要求较低，3)由于带宽和能量的限制，希望传感器网络中的通信仅存在各传感器和中央节点之间，由中央节点利用各信源的空间相关性联合解码。基于以上需求，申请人提出研究低时延分布式编码，即低维度量化器＋低source block长度的编码，以标量量化器＋标量编码为例，提出从图论的角度去设计编码机制。在此基础上做一系列延伸性研究，包括针对不稳定网络质量的具有鲁棒性的分布式容错编码方法的设计，针对多端通信的低时延联合信源信道编码的研究，针对有记忆信源的低时延分布式最优预测滤波器，最优变换编码和比特分配算法的设计。申请人还将搭建真实的无线传感器网络实验平台以验证以上理论结果的优越性。

中文关键词： 网络信息论；联合信源信道编码；零时延；边信息量；高斯互干扰信道

英文摘要： Wireless sensor netwroks have the potential to deliver significnat new capabilities in various applications ranging from enviromental health and safety to homeland security. However, these networks are severely constrained by bandwidth and power. In this project, the PI will conduct theoretical and experiemtal research to develop efficient data processing/compression techniques to reduce sensor communication, which, in turn, will result in lower bandwidth and power requirements and longer battery life. Unlike the recent methods based on turbo and low density parity check(LDPC) coding, the distributed source coding methods to be developed in this project will introduce a very low delay, and therefore, be more applicabel in scenarios involing delay-sensitive information, e.g., where some action must be taken in real time in response to a detected anomaly.This will be achieved through low source block length coding, for example, scalar quantizer+scalar coding. Significant effort will be made to develop effective coding scheme borrowing the idea from bipartite graph coloring. And the PI would extend the methodology for protection againist channel noise, channel loss, and unreliable sensors that either measure the data incorrectly or fail to function completely.The PI would also investigate low delay joint source cha

英文关键词： network information theory；joint source channel coding；zero delay；side information；Gaussian interference channel