基于选择重传ARQ的流星通信最优帧长设计-军事通信学专业论文.docx

Abstract Abstract Meteor burst communication (MBC) is a unique type of radio communication. Meteor burst communication channels are known for their intermittent and large variations of received signal power. The frame length has an enormous effect on the waiting time and the throughput of meteor burst communication. Therefore, an important research area is to determine the optimal frame length in the meteor burst communication. In this paper, we mainly focus on the throughput performance of selective-repeat automatic-repeat-request (ARQ) in conjunction with adaptive rate schemes. And an optimization design method of frame length is presented based on the analysis of characteristics of meteor channel. Firstly, we build the meteor burst communication model using OPNET software to determine the optimum range of frame length. Secondly, the probability density function of the initial signal to noise ratio (SNR) received is derived from the line electron density distribution of meteor bursts. Finally, we propose analytical expressions for average throughput performance of selective-repeat ARQ as combined with adaptive scheme for meteor burst communication. With these expressions, we can obtain an optimal frame length from the frame length range derived above. The simulation results show that the optimized frame length increases the average throughput of the meteor burst communication system, which may lay the foundation for practical applications of meteor burst communications. Keyword：meteor burst communication selective-repeat ARQ frame length waiting time average throughput 西安电子科技大学 学位论文独创性（或创新性）声明 秉承学校严谨的学风和优良的科学道德，本人声明所呈交的论文是我个人在 导师指导下进行的研究工作及取得的研究成果。尽我所知，除了文中特别加以标 注和致谢中所罗列的内容以外，论文中不包含其他人已经发表或撰写过的研究成 果；也不包含为获得西安电子科技大学或其它教育机构的学位或证书而使用过的 材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中做了明确的说 明并表示了谢意。 申请学位论文与资料若有不实之处，本人承担一切的法律责任。 本人签名： 日期 西安电子科技大学 关于论文使用授权的说明 本人完全了解西安电子科技大学有关保留和使用学位论文的规定，即：研究 生在校攻读学位期间论文工作的知识产权单位属西安电子科技大学。学校有权保 留送交论文的复印件，允许查阅和借阅论文；学校可以公布论文的全部或部分内 容，可以允许采用影印、缩印或其它复制手段保存