Title :
Time-domain method for tracking dispersive channels in MIMO OFDM systems
Author :
Roman, Timo ; Enescu, Mihai ; Koivunen, Visa
Author_Institution :
Signal Process. Lab., Helsinki Univ. of Technol., Finland
Abstract :
In this paper we address the problem of channel estimation for multiple-input multiple-output OFDM systems for mobile users. Channel tracking and equalization method stemming from Kalman filtering is proposed for time-frequency selective channels. Tracking of MIMO channel matrix is performed in time-domain and equalization in frequency domain. Applying the matrix inversion lemma significantly reduces computational complexity. Simulation results are presented using realistic channel model in typical urban scenarios.
Keywords :
Kalman filters; MIMO systems; OFDM modulation; computational complexity; dispersive channels; equalisers; matrix inversion; mobile communication; time-frequency analysis; time-varying channels; Kalman filtering; MIMO; OFDM systems; channel estimation; channel matrix; computational complexity; dispersive channels tracking; equalization method; frequency domain; matrix inversion lemma; multiple-input multiple-output; realistic channel; time-domain method; time-frequency selective channels; Channel estimation; Computational complexity; Dispersion; Filtering; Frequency domain analysis; Kalman filters; MIMO; OFDM; Time domain analysis; Time frequency analysis;
Conference_Titel :
Multimedia and Expo, 2003. ICME '03. Proceedings. 2003 International Conference on
Print_ISBN :
0-7803-7965-9
DOI :
10.1109/ICME.2003.1221690
