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A low-complexity port selection and power allocation scheme in distribution MIMO systems

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Journal of Electronics (China)

Abstract

Information theoretical results have shown that Distributed Antenna Systems (DAS) can obtain higher capacity than Co-located Antenna Systems (CAS). In this paper, we investigate a downlink port selection and power allocation scheme in Distributed Multiple-Input Multiple-Output (D-MIMO) systems, where Distributed Antenna (DA) ports randomly locate in the cell. The contribution of this paper can be summarized as two parts. Firstly, we analyze how antenna correlation affects power allocation in D-MIMO systems. Secondly, based on large scale fading and antenna correlation, a low-complexity port selection and power allocation scheme is proposed. In the proposed scheme, we take both large scale fading and antenna correlation into consideration. Moreover, User Equipment (UE) only needs to feedback the rank of transmit antenna correlation matrix, which will not increase system complexity too much. Simulation results verify the capacity improvement based on the proposed power allocation scheme.

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Authors and Affiliations

  1. Beijing University of Posts and Telecommunications, Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing, 100876, P. R. China

    Ningbo Zhang, Guixia Kang, Yanyan Guo & Ping Zhang

Authors
  1. Ningbo Zhang
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  2. Guixia Kang
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  3. Yanyan Guo
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  4. Ping Zhang
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Corresponding author

Correspondence to Ningbo Zhang.

Additional information

Supported by the National High Technology Research and Development Program of China (863 Program, No. 2006AA01Z272 and No. 2006AA01Z283) and Beijing Municipal Science & Technology Commission (No. D08080100620802).

Communication author: Zhang Ningbo, born in 1980, male, Doctor.

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Zhang, N., Kang, G., Guo, Y. et al. A low-complexity port selection and power allocation scheme in distribution MIMO systems. J. Electron.(China) 27, 145–150 (2010). https://doi.org/10.1007/s11767-010-0309-1

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  • DOI: https://doi.org/10.1007/s11767-010-0309-1

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