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Regularized Zero-Forcing for Multiantenna Broadcast Channels with User Selection

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2 Author(s)
Zijian Wang ; Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai, China ; Wen Chen

A multiantenna multiuser broadcast channel with transmitter beamforming and user selection is considered. Different from the conventional works, we consider imperfect channel state information (CSI) which is a practical scenario for multiuser broadcast channels. We propose a robust regularized zero-forcing (RRZF) beamforming at the base station. Then we show that the RRZF outperforms zero-forcing (ZF) and regularized ZF (RZF) beamforming even as the number of users grows to infinity. Simulation results validate the advantage of the proposed robust RZF beamforming.

Published in:

Wireless Communications Letters, IEEE  (Volume:1 ,  Issue: 2 )

Date of Publication:

April 2012

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