time division duplex

As TD-LTE system is based on time division duplex, the uplink and downlink channel reciprocity can be employed for smart antennas.

由于TD-LTE系统是以时分的方式实现，可以利用上下行信道的互易性更好的发挥智能天线的优势。

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One was based on time division duplex ( TDD) mode;

一种是基于时分双工（TDD）模式下最大信道增益而设计的；

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It adopts time division duplex mode. It can be allocated bandwidth flexible and can adjust time slot base on different service types for uplink and downlink which increases bandwidth efficiency.

它采用时分双工的模式，可以灵活的分配带宽资源，并能根据业务类型自适应的调整上、下行分配的时隙数，提高了频谱利用率。

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The Time Division Duplex communication protocol scheme defined Aerial Interface, Physical layer, Medium Accessing Control layer, Data Link layer and Network layer by mainly referring to the DECT layer divide and command alternant model, and therefore is an integrated communication protocol scheme.

该通信协议方案主要参照DECT的协议模型的层次划分结构和信令交互模式，分别对空中接口、物理层、媒体访问控制层、数据链路层和网络层进行定义，形成了比较完整的通信协议方案。

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And on the basis of that, this paper introduces the TDD ( Time Division Duplex), discusses the frame structure of the TDD protocol, and gives the way of realizing TDD.

并在此基础上，介绍了TDD（time Division Duplex）时分双工技术，讨论了TDD协议的帧结构，并给出了时分双工通信的实现方法。

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In this paper, the wireless data radio takes the GPS differential positioning as a starting point, takes the FSK modulation mode, can complete the wireless transmission of data in S frequency band with the time division duplex operation mode.

本文设计的无线数传电台以用于GPS差分定位为出发点，采用FSK的调制方式，能在S频段以时分双工的工作模式完成数据的无线传输。

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This system uses some key technology such as Low Chip Rate, Time Division Duplex, Smart Antennas and Joint Detection. The advantage of TD-SCDMA system includes: high frequency spectrum efficiency, flexible frequency using, applying to data service, low cost and so on.

该系统采用了低码片速率、时分双工、智能天线、联合检测等关键技术，具有频谱利用率高、频谱使用灵活、适合开展数据业务、系统成本低等特点。

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Phase 4 is the Beyond 3G ( B3G)/ Fourth Generation ( 4G) mobile communication Time Division Duplex ( TDD) system, based on TD-SCDMA.

最后一阶段是基于TD-SCDMA的时分双工（TDD）超3G（B3G）或者第4代移动通信系统阶段。

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By using channel reciprocity in time division duplex ( TDD) MIMO systems, the base station ( BS) can implement data transmitting pretreatment according to the channel state information ( CSI) obtained by uplink measurement without additional feedback overhead.

基于时分双工（TDD）技术的MIMO系统可以利用上下行信道的互易性，使得基站能够直接基于检测到的上行信道状态信息制定下行发射预处理策略而不需要额外的反馈开销。

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In this paper, a time division duplex ( TDD) multicarrier system based on Nyquist filter bank is proposed for wireless broadband communications.

提出了一个在无线宽带系统中的基于Nyquist滤波器的时分复用多载波系统。

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As the only system using Time Division Duplex in the 3G system, it has some advantages over systems of Frequency Divsion Duplex.

作为3G系统中唯一一个使用时分双工的系统，它具备了许多频分双工系统所不具备的优点。

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A packet reservation multiple access protocol in time division duplex

一种适合时分双工环境的分组预约多址协议

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On the base of wireless voice communication system which used TDD technology, constituted a time division duplex communication protocol in this paper. And was implement the communication protocol by the program.

本文在基于以TDD技术为基础的无线语音通信系统中，制定了时分双工通讯协议，并通过编程实现了无线语音双工通信。

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Packet Reservation Multiple Access Protocol in Time Division Duplex ( PRMA/ TDD) and Its Performance Analysis

时分双工环境下的分组预约多址（PRMA/TDD）协议及其性能

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A kind of 8 element circular adaptive array antenna is proposed to time division duplex cellular mobile system, based on non linear decision feedback equalizer and recursive least square algorithm.

介绍了一种适用于时分双工蜂窝移动系统、基于非线性判决反馈均衡器和递归最小平方算法的环形自适应阵列天线。

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National Mobile Communications Research Laboratory of Southeast University proposed General Multicarrier Time Division Duplex Hybrid Division Multiple Acesss ( GMC-TDD-xDMA) radio transmission technology in this background.

在这一背景下，东南大学移动通信国家重点实验室提出了广义多载波时分双工混合多址（GMC-TDD-xDMA）无线传输技术。

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