流星余迹通信最佳传输帧长设计  

Optimum Design of Frame Length for Meteor Burst Communications

作　　者：尹德[1] 李赞[1] 郝本建[1] 蔡觉平[2] 

机构地区：[1]西安电子科技大学ISN国家重点实验室,陕西西安710071 [2]西安电子科技大学微电子学院,陕西西安710071

出　　处：《电子学报》2010年第10期2229-2233,共5页Acta Electronica Sinica

基　　金：国家863高技术研究发展计划(No.2009AA01Z237);新世纪优秀人才支持计划资助(No.NCET-07-0653);国家新一代宽带无线移动通信网科技重大专项(No.2010ZX03006-002);国家自然科学基金(No.61072070);高等学校学科创新引智计划资助(No.B08038);长江学者和创新团队发展计划资助(No.IRT0852)

摘　　要：在分析流星余迹通信原理及其传输信道物理特性基础上,根据流星余迹电子线密度的分布特性,构建出流星余迹信号初始接收功率的概率密度函数.针对以信号帧为单位的自适应变速率传输机制,推导出欠密类余迹平均信息通过量与传输帧长的关系,提出最佳帧长设计原则,得到自适应传输帧长的理论最佳值.仿真结果表明,在满足通信可靠性及实时性的要求下,所得最佳帧长能使系统平均信息通过量达到最大,有效提高流星余迹信道利用率.Based on analyzing the principles of meteor burst communications and the physical characteristics of meteor burst channel,according to the mechanism of using the signal frame as the basic transmission unit for adaptive variable rate transmission,the effects of the frame length on system performance are analyzed in this paper.According to the line electron density distribution of meteor bursts,the probability density function of the initial signal power received from the trails is derived.In terms of the function of the received signal power,the relationship between the system throughput and the frame length is built and the principle of frame length selection is determined.The simulation results show that the optimized frame length can maximize the average throughput of the system and make the best use of the meteor burst channel,while satisfying the reliability and instantaneity of the meteor burst communication system.

关 键 词：流星余迹通信 自适应变速率 衰减系数 帧结构 概率密度函数 

分 类 号：TN926.5[电子电信—通信与信息系统]