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TD与GSM室内覆盖网络合路方式研究
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作者 宗春 《江苏通信》 2012年第6期62-63,66,共3页
未移动通信网络现有室内覆盖以GSM室分系统为主。介绍了4种时分同步码分多址(TD鄄SCDMA,简称TD)与GSM室内覆盖合路的方式:TD信源直接合路、TD信源干放后合路、TD信源耦合后分区覆盖、TDRRU(射频拉远单元)信源分区覆盖,对其特点进行了比... 未移动通信网络现有室内覆盖以GSM室分系统为主。介绍了4种时分同步码分多址(TD鄄SCDMA,简称TD)与GSM室内覆盖合路的方式:TD信源直接合路、TD信源干放后合路、TD信源耦合后分区覆盖、TDRRU(射频拉远单元)信源分区覆盖,对其特点进行了比较,为后期TD及LTE(长期演进)室内覆盖网络的建设提供选择。 展开更多
关键词 室内覆盖 信源 合路方式
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TD-SCDMA室内覆盖策略研究
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作者 尹启禄 葛磊 黄翠琳 《移动通信》 2008年第14期49-54,共6页
文章从室内分布信源选取、常用室内分布实现方式两个方面对TD-SCDMA室内覆盖策略进行了研究,通过对比分析,得出各种室内覆盖策略的优缺点以及适用范围,为提高室内覆盖系统设计及建设技术质量提供了依据。
关键词 TD-SCDMA 室内分布系统 合路方式 BBU+RRU
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Analyzing Parabolic Profile Path for Underwater Towed-Cable 被引量:2
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作者 Vineet K. Srivastava 《Journal of Marine Science and Application》 2014年第2期185-192,共8页
This article discusses the dynamic state analysis of underwater towed-cable when tow-ship changes its speed in a direction making parabolic profile path. A three-dimensional model of underwater towed system is studied... This article discusses the dynamic state analysis of underwater towed-cable when tow-ship changes its speed in a direction making parabolic profile path. A three-dimensional model of underwater towed system is studied. The established governing equations for the system have been solved using the central implicit finite-difference method. The obtained difference non-linear coupled equations are solved by Newton's method and satisfactory results were achieved. The solution of this problem has practical importance in the estimation of dynamic loading and motion, and hence it is directly applicable to the enhancement of safety and the effectiveness of the offshore activities. 展开更多
关键词 underwater towed-cable underwater towed system parabolic profile central implicit finite-difference method Newton's method offshore activities
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