MIMO-OFDM Channel Estimation with Eigenbeamforming and User-Specific Reference Signals

Author

Schober, K. ; Wichman, R.

Author_Institution

Helsinki Univ. of Technol., Helsinki

fYear

2009

fDate

26-29 April 2009

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th

Conference_Location

Barcelona

ISSN

1550-2252

Print_ISBN

978-1-4244-2517-4

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2009.5073674

Filename

5073674