Capacity Improvement for TDD-MIMO Systems via AR Modeling Based Linear Prediction |
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Authors: | Halil Yigit Adnan Kavak Kerem Kucuk |
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Affiliation: | (1) Gwangju Institute of Science and Technology, GIST, Gwangju, South Korea;(2) Amazon.com, Seattle, USA;(3) Dankook University, Yongin, South Korea |
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Abstract: | The quality of channel state information (CSI) affects the performance of multiple input multiple output (MIMO) systems which
employ multi-elements antenna arrays at both the transmitter and the receiver. In a time division duplex (TDD) systems, the
CSI for downlink can be obtained from uplink channel using reciprocity principal. However, the performance of a MIMO system
can be degraded due to channel impairments especially in fast fading scenarios when the CSI obtained from uplink is used for
downlink transmission. In this paper, we study performance of autoregressive (AR) modeling based MIMO channel prediction under
varying channel propagation conditions (mobile speed, multipath number and angle spread) and prediction filter order. Our
simulation results show that using the predicted CSI for downlink provides capacity improvement compared to conventional method. |
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