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A Comprehensive Survey of TDD-Based Mobile Communications Systems from TD-SCDMA 3G to TDLTE-Advanced 4G and 5G directions

查看全文 作　　者：CHEN [1,2]Shanzhi;SUN [1,2]Shaohui;WANG [1,2]Yingmin;XIAO [1]Guojun;Rakesh [2]Tamrakar 高影响力作者 机构地区：[1]State Key Laboratory of Wireless Mobile Communications,China Academy of Telecommunications Technology(CATT);[2]Datang Telecom Technology & Industry Group高影响力机构 出　　处：《China Communications》索引2015年第12卷第2期,共21页高影响力期刊 基　　金：supported in part by the National Natural Science Foundation of China for Distinguished Young Scholar,Grant Number:61425012 摘　　要：TDD(Time Division Duplex) is one of the two duplex modes.TD-SCDMA(Time division Synchronous CDMA) is the first TDD-based cellular mobile system which is commercialized in wide area and large scale and TD-SCDMA is also the first cellular mobile system which adopted smart antenna technology,also called as beamforming.As the long term evolution of TD-SCDMA,TDLTE(A)(Time Division-Lone Term Evolution,and TD-LTE Advanced) introduced OFDM(Orthogonal Frequency Division Multiplexing)and enhanced smart antenna technology together with MIMO(Multiple Input Multiple Output),which are adopted by LTE FDD(Frequency Division Duplex) either.It is indicated that TD-SCDMA and TD-LTE(A)have opened a sustainable utilization era of TDD and smart antenna Technologies in the wireless mobile communication.This paper aims to present a systematic introduction to TDD-based mobile communications from TD-SCDMA to TD-LTE and beyond and its comparisons to FDD,with particular focuses on TDD key technologies,principles of TDD cellular mobile systems,TDD evolution path,and future TDD 5G directions.We hope that this paper will provide a comprehensive overview of TDD technology upgrade and its standard evolution,and serve as a valuable reference for research on 5G mobile communication systems.It is believed that TDD will play more important role in 5G. 关 键 词：TD-SCDMA系统 蜂窝移动通信系统 TDD 基础 智能天线技术 蜂窝移动系统 时分双工 3G
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