深空通信中的喷泉编译码技术  

Fountain Codes in Deep Space Communication

作　　者：李晖[1] 姚文顶[1] 张乃通[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《电讯技术》2008年第4期8-12,共5页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(60672089;60772075)

摘　　要：针对深空通信长时延、误码率和丢包率大、上下行链路带宽不对称和链路易中断等特点,提出利用喷泉码的编译码技术解决上述问题。阐述了喷泉码的编译原理、类型、典型应用、关键技术,并提出利用喷泉码不需要反馈的思想,将喷泉编码与深空通信中的协议技术相结合,以简化协议,减少确认-重传过程,缩短长距离文件传输时延,增大系统的吞吐量。In deep space communications, fountain codes theory was proposed to solve the problems of huge delay, higher BER and probability of lost packets, asymmetric up and down link - width, intermittence of links. In this paper ,the principles, classification, typical application and key techniques of fountain codes are discussed. Syncretizing the idea of fountain codes and file delivery protocol in deep space may help to predigest protocol stack, decrease redundant processes of acknowledge - retransmission, shorten file transmission delay in large distance and increase throughput of the communication system.

关 键 词：深空探测 深空通信 信道编码 喷泉编码 

分 类 号：TN911.22[电子电信—通信与信息系统] V443[电子电信—信息与通信工程]