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| Robust Vector Precoding with Imperfect Channel State Information |
| Shi-Qi-Ming, JIANG Ling-Ge, HE Chen |
| (School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University,Shanghai 200240, China) |
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Abstract
A robust vector precoding scheme is proposed for imperfect channel in multiuser MIMO system. In the nonideal channel model, the transmit side only knows imperfect channel state information, i.e. the mean value of the channel estimation and the 1st and the 2nd order statistic value of the estimation error. Based on this channel model, the robust VP precoding matrix and perturbation vector are obtained by minimizing the mean square error of the transmitted and received signals. Simulation results show that the new precoding scheme outperforms the conventional scheme.
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Published: 30 March 2011
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