Browsing by Author "Ma, Chingwo"

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LMMSE-Based Channel Estimation for LTE-Advanced MIMO Downlink Employing UE-Specific Reference Signals
(2015)
Hsieh, Chia-Yu
;
Lin, David W.
;
Ma, Chingwo
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
The LTE-Advanced wireless communication standard specifies UE-specific reference signals (short-named DMRS) to facilitate multi-input multi-output (MIMO) downlink channel estimation. This paper presents a linear minimum mean-square error (LMMSE)-based channel estimation technique in this context. Key to LMMSE channel estimation is the acquisition of some second-order channel statistics, for which the present work adopts a previously proposed approach that employs a parametric model for the channel autocorrelation function and estimates the model parameters from the received DM-RS. While such MIMO transmission is usually considered applicable to slow motion, our results show that the channel estimation technique itself can accommodate much faster motion.