Title :
MIMO-OFDM Channel Estimation with Eigenbeamforming and User-Specific Reference Signals
Author :
Schober, K. ; Wichman, R.
Author_Institution :
Helsinki Univ. of Technol., Helsinki
Abstract :
MIMO-OFDM systems with channel reciprocity allow spatial multiplexing using eigenbeamforming. However, eigenbeamforming requires singular value decomposition, which is phase ambiguous and causes the precoded channel to become phase discontinuous in frequency domain. This changes statistical properties of channel components, which degrades the performance of channel estimation. In this paper we propose phase unifying method to improve channel statistics and consequently decrease the error in channel estimation. In addition, we investigate the 2D-Wiener channel estimation with respect to different channel frequency correlation functions. The performance is evaluated using LTE link simulator.
Keywords :
MIMO communication; OFDM modulation; array signal processing; channel coding; channel estimation; precoding; space division multiplexing; statistical analysis; 2D-Wiener channel estimation; MIMO-OFDM system; channel precoding; eigenbeamforming; multiple input multiple output systems; orthogonal frequency division multiplexing system; spatial multiplexing; statistical property; Channel estimation; Degradation; Equations; Frequency domain analysis; MIMO; OFDM; Singular value decomposition; Statistics; Transmitters; Wiener filter;
Conference_Titel :
Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-2517-4
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2009.5073674
