Time-domain method for tracking dispersive channels in MIMO OFDM systems

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.

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