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A Codebook-Based Precoding Method for MIMO Amplify-and-Forward Relaying System

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4 Author(s)
Yuan Luo ; Wireless Technol. Innovation Labs., Beijing Univ. of Posts & Telecommun., Beijing, China ; Lihua Li ; Qiang Wang ; Zhixin Liu

This paper proposes a codebook-based precoding method for multiple-input multiple-output (MIMO) amplify-and-forward (AF) relaying system. The proposed codeword selection criterion is a distributed codeword selection criterion which allows base station and relay to choose optimal precoding matrix independently. Therefore the feedback delay is decreased. Based on the proposed criterion, we further develop a codebook design criterion. It is shown that the design criterion is equivalent to packing subspaces in the Grassmannian manifold using the Fubini-Study distance. Numerical simulations also show that the proposed scheme achieves elegant performance in terms of ergodic capacity.

Published in:

Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 IEEE 72nd

Date of Conference:

6-9 Sept. 2010