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| Multiuser Diversity in Distributed Antenna System |
| Zheng Hai-bo;Wang Jing; Zhou Shi-dong; Su Xin |
| Tsinghua National Laboratory of Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China |
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Abstract In recent years, there has been considerable interest in distributed antenna system due to its promising improvement in coverage, power efficiency and channel capacity. But many papers are only focused on these cases and do not consider multiuser diversity. A minimal capacity loss Round-Robin scheduling algorithm is presented in this paper. Coupled with this algorithm, the multiuser diversity is studied in downlink distributed antenna system based on zero-forcing beamforming. The results show that with the same antenna number and sum power Distributed Antenna System (DAS) is preferable to Co-located Antenna System (CAS) in term of multiuser diversity gain. The minimal capacity loss Round-Robin scheduling algorithm distinctly outperforms common Round-Robin scheduling algorithm and it can be used in DAS and CAS.
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Received: 17 April 2006
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2007, Vol. 29 
