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MIMO transmission over a time-varying channel using SVD

Lebrun, Guillaume, Gao, Jason and Faulkner, Michael (2005) MIMO transmission over a time-varying channel using SVD. IEEE Transactions on Wireless Communications, 4 (2). pp. 757-764. ISSN 1536-1276

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The performance of a system using singular value decomposition (SVD) over a multiple-input multiple-output (MIMO) channel is dependent on the accuracy of the channel state information (CSI) at the transmitter and the receiver. In time division duplex (TDD) systems, the channel is reciprocal, hence the CSI can be retrieved through estimation of pilot symbols and applied to transmission. However, for a time-varying channel, the estimated CSI at the transmitter is incorrect due to an inherent delay between the estimation of the CSI and the transmission of data. A typical system employing SVD suffers degradation in capacity when incorrect CSI is used to transmit data. This paper proposes a new linear processing architecture, which reduces the effect of incorrect CSI at the transmitter. No additional pilot signals are required. It is shown at terminal velocity of 2 m.s-1 for the Hiperlan 2 standards, that the proposed architecture has a capacity of one bit lower than the theoretical channel capacity. At low velocities, this architecture outperforms (in terms of capacity) simpler systems that do not require CSI at the transmitter.

Item Type: Article
Uncontrolled Keywords: wireless telecommunication, channel capacity, local network, degradation, data transmission, parameter estimation, time division multiplexing, transmitter, channel estimation, accuracy, performance evaluation, singular value decompostion, time variable channel, transmission time, MIMO system
Subjects: Historical > RFCD Classification > 290000 Engineering and Technology
Historical > Faculty/School/Research Centre/Department > School of Engineering and Science
Historical > RFCD Classification > 280000 Information, Computing and Communication Sciences
Depositing User: Ms Phung T Tran
Date Deposited: 01 Feb 2009 14:08
Last Modified: 06 Jul 2011 00:49
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Citations in Scopus: 131 - View on Scopus

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