Channel estimation for ofdm systems

摘要

A method for performing channel estimation in an orthogonal frequency-division multiplexing system, the method including the steps of: receiving ( 80 ) transmitting pilot symbols from a plurality of transmit antennas; forming ( 82 ) a least-squares estimation matrix from the transmitted pilot symbols; forming ( 8488 ) a sparse smoothing matrix approximating a fixed weighting matrix, wherein each row vector in the sparse smoothing matrix contains one or more of the strongest weights in each row of the fixed weighting matrix; and ( 90 ) deriving a channel estimation matrix from the sparse smoothing matrix and the least-squares estimation matrix.