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FuTUKE B3G TDD is designed to provide 100 Mbps peak data rate in both uplink and downlink. In this paper, 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. To provide a multi-cell coverage, a soft frequency reuse is adopt. Further, a joint spatial and...
For multiuser MIMO system, zero forcing beamforming (ZFB) can be adopted to exploit the multiuser spatial multiplexing gain and diversity gain in downlink by spatial multiuser scheduling. On the other hand, multiuser joint subcarrier allocation can obtain multiuser diversity gain in frequency domain. In this paper, a novel joint spatial and frequency proportional fairness (SFPF) scheduler is proposed...
For OFDMA system, the greedy subcarrier and bit loading can be adopted to exploit the multiuser diversity in frequency domain for the independent fading of different users and achieve higher cell throughput without considering the user fairness. Meanwhile in MIMO scenario, different UE experience independent spatial fading for different location, and thus the different antenna at the base station...
Multiple input and multiple output (MIMO) can greatly enhance the performance of wireless system. However, the limited battery life and terminal size of the user equipment (UE) in a cellular system put a constraint on the performance enhancement by MIMO. Especially when the transmitter has more antenna than the receiver in downlink, the conventional MIMO schemes can only exploit partial multiplexing...
As the evolution of 3G, long term evolution (LTE) standardization activity is issued in 3GPP and 3GPP2. In previous paper OFDMA is proposed for downlink of LTE. As the channel reciprocity can be obtained in TD-SCDMA LTE system, the channel status information (CSI) can be exploited at the transmitter to obtain the spatial-frequency multiuser diversity by joint spatial-frequency subcarrier and antenna...
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