物理学报2011，Vol.60Issue(6)：389-396,8.
交换节点基于电磁波全向辐射特性的M维空时纠错码理论
M-dimensional space-time error correction code theory for switch node based on omnidirectional radiation of electromagnetic wave
摘要
Abstract
In wireless communication field, the omnidirectional radiation of electromagnetic wave in free space is always considered as a big shortcoming, nevertheless, it can be used to improve the performace of wireless communication system in network entironment. Here, we consider that M nodes use a switch node to exchang their information in a wireless network. Differert from the conventional method, the switch node will take the joint coding method for the M independent information, then transmit the same codeword to all M nodes simultaneously through the omnidirectional radiation. For the novel network code, the mathematical definition of the M -dimension space-time error correction code is proposed, and some theorems about its performance are proved to lay a foundation to construct good codebooks. The redundancy of time and space domain is added to the novel codebook at the same time, and the efficiency of the transmit power is improved, so we can design high-rate codebook with good error detection and correction capability. Moreover, the complexity of its decoding algorithm can be reduced, owing to the distributed data processing. Here, we emphasize that contrary to one' s intuition, our proposed codebook reveals that it is in general not correct to take the rate of codebook which has the error detection and correction capability to be less than 1.关键词
全向辐射/无线通信网络/交换节点/M维空时纠错码Key words
omnidirectional radiation/wireless communication network/switch node/ M -dimension space-time error correction code引用本文复制引用
谢映海,杨维,许昌龙..交换节点基于电磁波全向辐射特性的M维空时纠错码理论[J].物理学报,2011,60(6):389-396,8.基金项目
国家科技重大专项(批准号:2009ZX03003-005)、教育部长江学者和创新团队发展计划(批准号:IRT0949)、轨道交通控制与安全国家重点实验室自主研究课题(批准号:RCS2009ZT014)、西安电子科技大学综合业务网理论和关键技术国家重点实验室(批准号:ISN11-10)资助的课题. （批准号:2009ZX03003-005）
