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Robust beamforming in the MISO downlink with quadratic channel estimation and optimal training

Zheng, G; Wong, K-K; Ma, S; Ng, T-S; (2009) Robust beamforming in the MISO downlink with quadratic channel estimation and optimal training. IEEE Transactions on Wireless Communications , 8 (3) 1067 - 1072. 10.1109/TWC.2009.071217.

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Abstract

Estimation of the channel state information (CSI) in quadratic form (i.e., quadratic channel estimation) in the downlink can be performed at the base station by using the relayed signals from the mobile users, which facilitates optimization with transmitter CSI. In this letter, the condition for the optimal training sequence for quadratic channel estimation in a multiuser multiple-input single-output (MISO) antenna system in the downlink is first obtained. The mean-square-error (MSE) in the CSI estimate is then analyzed. Based on the quadratic CSI estimates, a robust beamforming optimization algorithm to minimize the base station power while achieving individual users quality-of-service (QoS) constraints, measured by the MSE in data reception, is proposed. © 2006 IEEE.

Type:Article
Title:Robust beamforming in the MISO downlink with quadratic channel estimation and optimal training
DOI:10.1109/TWC.2009.071217
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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