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深空探测低信噪比通信研究
引用本文:姜斌, 包建荣. 深空探测低信噪比通信研究[J]. 空间科学学报, 2012, 32(4): 575-584. doi: 10.11728/cjss2012.04.575
作者姓名:姜斌  包建荣
作者单位:1.杭州电子科技大学通信工程学院 杭州 310018;;2.浙江大学浙江省综合信息网技术重点实 验室 杭州 310027
基金项目:国家自然科学基金项目,中国博士后科学基金,浙江省综合信息网技术重点实验室开放课题
摘    要:与传统无线通信相比, 深空通信由于传输损耗巨大、探测器能量受限且轨道多变等因素, 须解决信噪比(Signal to Noise Ratio, SNR)极低、数据接收不连续及信道参数多变等难题. 针对这些问题, 论述了在深空探测极低SNR下需重点研究的深空天线组阵、编码与调制、联合解调译码、喷泉码以及其自主无线电实现等关键技术, 以有效协助解决上述深空通信难题. 同时, 讨论了这些关键技术的发展趋势及其在未来深空通信中的应用.

关 键 词:深空通信   联合解调译码   自主无线电   喷泉码
收稿时间:2011-11-25
修稿时间:2012-05-25

Research on Communications at Low SNRs in Deep Space Explorations
JIANG Bin, BAO Jianrong. Research on Communications at Low SNRs in Deep Space Explorations[J]. Chinese Journal of Space Science, 2012, 32(4): 575-584. doi: 10.11728/cjss2012.04.575
Authors:JIANG Bin  BAO Jianrong
Affiliation:1. School of Telecommunication Engineering, Hangzhou Dianzi University, Hangzhou 310018;;2. Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, Hangzhou 310027
Abstract:Compared with traditional wireless communications, deep space communications are challenged with difficult problems of extremely low Signal-to-Noise Ratio (SNR), high transmission delay and discontinuous reception of data which are mainly caused by large transmission loss, limited energy and changeful trajectory of the space probe, etc. Faced with these problems, the researches on several key techniques at extremely low SNR in deep space communications are introduced. And the techniques include deep space antenna arrays, coding and modulation, joint demodulation and decoding, fountain coding and the autonomous radio and so on to help solve the above problems. Finally, the development trends and related applications of them are prospected. 
Keywords:Deep space communications  Joint demodulation and decoding  Autonomous radio  Fountain codes
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