System optimization from field channel measurement and performance evaluation on future B3G TDD system

2007 Asia-Pacific Conference on Communications Pub Date : 2007-10-01 DOI:10.1109/APCC.2007.4433512

Jianhua Zhang, Guangyi Liu, Weidong Wang

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Abstract

FuTURE B3G TDD is designed to provide 100 Mbps peak data rate in both uplink and downlink. In this paper, the MIMO channel measurement campaign carried out in BUPT campus is briefly introduced. Based on the results from the field channel measurement, the radio transmission parameters of physical layer is optimized, and the downlink performance of FuTURE B3G TDD is evaluated in system level with soft frequency reuse and spatial-temporal-frequency scheduling for multiuser zero forcing beamforming, which is designed to explore the multiuser diversity gain at both spatial and frequency domain. As the channel reciprocity can be obtained in TDD system, the Channel State Information (CSI) can be exploited at the transmitter to obtain the spatial-frequency multiuser diversity by joint spatial-frequency subcarrier and antenna assignment of MIMO OFDMA for the independent fading of different user in spatial and frequency domain. With the optimised radio transmission parameters, the peak data rate and system throughput can be improved 12.7%. The downlink system throughput in multi-cell scenario can achieve about 30 Mbps with 4times2 MIMO in 10 MHz bandwidth.

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从现场信道测量和未来B3G TDD系统性能评估的角度进行系统优化

FuTURE B3G TDD的设计目标是在上行和下行链路上提供100mbps的峰值数据速率。本文简要介绍了在北邮校园进行的MIMO信道测量活动。在现场信道测量结果的基础上，优化了物理层无线电传输参数，并在系统级对FuTURE B3G TDD进行了软频率复用和时空频率调度的多用户零强迫波束形成下行性能评估，从空间和频域两个方面探索了多用户分集增益。由于TDD系统可以获得信道互易性，因此可以在发射机端利用信道状态信息(CSI)，通过MIMO OFDMA的联合空频子载波和天线分配来获得不同用户在空间域和频率域的独立衰落的空频多用户分集。优化后的无线传输参数可使峰值数据速率和系统吞吐量提高12.7%。在多小区场景下，在10 MHz带宽下，采用4倍2 MIMO的下行系统吞吐量可达到30 Mbps左右。

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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2007 Asia-Pacific Conference on Communications

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