Implementation and measurement of single user MIMO testbed for TD-LTE-A downlink channels

2016 8th IEEE International Conference on Communication Software and Networks (ICCSN) Pub Date : 2016-06-04 DOI:10.1109/ICCSN.2016.7586651

S. Aghaeinezhadfirouzja, Hui Liu, Bin Xia, M. Tao

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引用次数: 3

Abstract

This paper, design and utilize the implementation of 8 × 2 outdoor single-user multiple-input, multiple-output (SU-MIMO) systems for time division duplex LTE-A channels at 2.680 GHz to 2.690 GHz. With this purpose, there is a need for accurate and actual radio propagation model at these bands where around the Shanghai Jiao Tong University (SJTU) campus network. In that SU-MIMO testbed, both the transmitter and the receiver communications are made by employing eight (four pairs of cross polarization) antennas in the transmitter side and 2 at the receiver for real time network. Measurements show the experimental characteristics of the future Physical Downlink Control Channel (PDCCH) and Physical Downlink Shared Channel (PDSCH), sensitive to absolute power levels that may not be enough to support a large number of UEs in a cell. We also show the weakness of the current cellular network that is to reach an accurate synchronization such as Coarse Timing Synchronization (CTS) between the receive symbols. This CTS defect can lead to the severe performance degradation and issue for MIMO wireless systems.

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TD-LTE-A下行信道单用户MIMO试验台的实现与测量

本文设计并实现了2.680 GHz ~ 2.690 GHz时分双工LTE-A信道的8 × 2室外单用户多输入多输出(SU-MIMO)系统。为此，需要在上海交通大学校园网周围的这些频段建立准确、真实的无线电传播模型。在该SU-MIMO试验台中，发送端和接收端通信采用8根(4对交叉极化)天线在发送端，接收端采用2根天线进行实时网络通信。测量显示了未来物理下行链路控制通道(PDCCH)和物理下行链路共享通道(PDSCH)的实验特性，对绝对功率水平敏感，可能不足以支持小区中的大量ue。我们还展示了当前蜂窝网络的弱点，即在接收符号之间达到精确同步，例如粗定时同步(CTS)。这种CTS缺陷会导致MIMO无线系统的严重性能下降和问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 8th IEEE International Conference on Communication Software and Networks (ICCSN)

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