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Published in:
2011 | OriginalPaper | Chapter
Transmit Precoding for Time Varying Channel by Considering Channel Prediction Error
Authors : V. Kejalakshmi, S. Arivazhagan
Published in: Trends in Network and Communications
Publisher: Springer Berlin Heidelberg
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Transmit precoding techniques used at the base station(B.S) greatly reduces inter symbol interference(ISI) and inter channel interference(ICI), and allows the receiver to be complete simplified. These techniques needs full channel state information(CSI) at the B.S. But the CSI at the B.S is often outdated because of time varying nature of the channel. Hence, to adapt the transmit precoding technique, it is necessary to update the CSI at the transmitter. For reliable adaptive transmission, it is required to have the prediction of future CSI. In this paper we consider the kalman filter to predict the future channel, then the prediction error is corrected by the proposed technique. Then the prediction error corrected channel is used to construct the linear precoding matrix. Our simulation results show that the Bit error rate(BER) perfomance is improved if the prediction error is corrected to construct linear precoding matrix.