Linear precoding in distributed MIMO systems with partial CSIT

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

4 Scopus Citations
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  • Chongbin Xu
  • Jianwen Zhang
  • Fuchun Zheng
  • Li Ping

Related Research Unit(s)


Original languageEnglish
Article number22
Journal / PublicationEurasip Journal on Advances in Signal Processing
Issue number1
Publication statusPublished - 2013



We study the transmission problem in a distributed multiple-input multiple-output (MIMO) system consisting of several distributed transmitters and a common receiver. Assuming partial channel state information at the transmitter (CSIT), we propose a low-cost weighted channel matching and scattering (WCMS) linear precoding strategy. The proposed precoder can be decomposed into two parallel modules: channel matching (CM) and energy scattering. The signals generated by the CM modules from different transmitters provide a coherent gain with improved power efficiency. The use of the scattering modules provides robustness against CSIT uncertainty. By properly combining these two modules, WCMS can achieve coherent gain proportional to the accuracy of the available CSIT as well as robustness against CSIT error. WCMS is simple and fully decentralized and thus is highly suitable for a distributed MIMO system. Numerical results demonstrate that WCMS indeed achieves significant gains in distributed MIMO environments with partial CSIT. © 2013 Xu et al.; licensee Springer.

Research Area(s)

  • Channel state information at the transmitter (CSIT), Distributed multiple-input multiple-output (MIMO) systems, Iterative detection, Linear precoding

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