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International Journal of Antennas and Propagation
Volume 2013, Article ID 416352, 9 pages
http://dx.doi.org/10.1155/2013/416352
Research Article

Limited Feedback Precoding for Massive MIMO

Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100084, China

Received 11 January 2013; Revised 18 July 2013; Accepted 7 August 2013

Academic Editor: Wei Xiang

Copyright © 2013 Xin Su et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The large-scale array antenna system with numerous low-power antennas deployed at the base station, also known as massive multiple-input multiple-output (MIMO), can provide a plethora of advantages over the classical array antenna system. Precoding is important to exploit massive MIMO performance, and codebook design is crucial due to the limited feedback channel. In this paper, we propose a new avenue of codebook design based on a Kronecker-type approximation of the array correlation structure for the uniform rectangular antenna array, which is preferable for the antenna deployment of massive MIMO. Although the feedback overhead is quite limited, the codebook design can provide an effective solution to support multiple users in different scenarios. Simulation results demonstrate that our proposed codebook outperforms the previously known codebooks remarkably.