基于空时编码的高效星地数据传输技术

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英文篇名：High-efficiency satellite-to-earth data transmission technology based on space-time coding 作者：丁丹 ; 林存宝 英文作者：DING Dan;LIN Cunbao;Department of Electronic and Optical Engineering,Space Engineering University; 关键词：空时编码 ; 数据传输 ; 相关性 ; 频谱效率 ; 链路 ; 功率 英文关键词：space-time coding;;data transmission;;relativity;;spectrum efficiency;;link;;power 中文刊名：XDDJ 英文刊名：Modern Electronics Technique 机构：航天工程大学电子与光学工程系; 出版日期：2019-03-05 14:18 出版单位：现代电子技术 年：2019 期：v.42;No.532 基金：国家高技术研究发展计划(“863”)(2015AA7026085)~~ 语种：中文; 页：XDDJ201905002 页数：5 CN：05 ISSN：61-1224/TN 分类号：14-17+22

摘要

为提升星地数据传输效率,多采用时间域变速率传输模式,但改善程度有限。文中从空间域角度着手,提出基于空时编码的高效星地数据传输技术,通过空时预编码将多个混叠的数据流分离开来,形成多个编码通道同时传输多路并发数据,并且能够在空间域上收集散射、反射路径功率,从而充分利用有限的链路功率。分析与仿真结果显示,采用星上2天线对2个用户的传输模式,相比传统点对点的传输模式其频谱效率可提升0.5～1 b?s~(-1)?Hz~(-1)。
        The time-domain variable rate transmission mode is often adopted to increase the transmission efficiency of satellite-to-earth data,but has limited improvement. Proceeding from the space-domain perspective,a high-efficiency satellite-toearth data transmission technology based on space-time coding is proposed. The multiple aliasing data streams are separated by means of space-time precoding to form multiple coding channels for multi-channel parallel data transmission. The scattered and reflected path power is collected to fully utilize the limited link power. The analysis and simulation results show that,in comparison with traditional point-to-point transmission mode,the spectrum efficiency of the data transmission mode of two antennas on satellite to two users is improved by 0.5～1 b?s~(-1)?Hz~(-1).

引文

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