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In this paper, a novel Ultra-Wideband and High-Frequency (UWHF) channel modeling is proposed for the next generation wireless communications e.g., 5G. The novel channel modeling is proposed based on the Ultra-Wideband (UWB) channel model and channel measurement results at high-frequency (28GHz and 73GHz) in real scenarios. In specific, the novel channel modeling method aims at accurately describing...
In this paper, we analyze the performance of distributed antenna systems (DASs) using random matrix theory. We consider the scenarios that the antennas of the terminals are distributed geographically in the coverage instead of being installed nearby each other, e.g. the high-speed railway networks and the high-altitude platform networks. Thus the variances of the entries in the considered channel...
In this paper, the beamforming designs for uplink virtual MIMO systems are investigated. In such systems, the most challenging difficulty in beamforming designs comes from the fact that the nodes consisting the virtual MIMO are subjected to individual power constraints or named per-antenna power constraints instead of sum power constraints. The instinct individual power constraints for virtual MIMO...
This paper considers coordinated precoding design in multi-cell scenarios where transmitters and receivers are both equipped with multiple antennas. To suppress the co-channel interference, much channel state information (CSI) should be sent back to the transmitters. Most previous work in the area has assumed that transmitters have common knowledge of both data symbols of all users and full or local...
In this paper, three scheduling algorithms are presented for multi-user MIMO precoding based on code book to achieve precoding and multi-user diversity gain in broadcast channel. Randomicity, feedback load and system capacity are considered in the three criteria. The precoding matrices are generated based on the per user unitary and rate control (PU2RC) proposed by Samsung. Theoretical analysis and...
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