| 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。 |
| 关键词: 深空探测,深空通信,信道编码,喷泉编码 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:November 07, 2007 |
| 基金项目:国家自然科学基金 |
|
| Fountain Codes in Deep Space Communication |
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| Abstract: |
| 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. |
| Key words: deep space exploration,deep space communications,channel coding,fountain codes |
