1. A method for a receiver to estimate one or more conditions of a channel upon which the receiver receives Orthogonal Frequency Division Multiplexing (OFDM) signals, comprising: performing joint two-dimensional Minimum Mean-Square Error (2D-MMSE) channel estimation on any Resource Element (RE) containing a reference signal in a received resource block (RB); using data at least from the joint 2D-MMSE channel estimation of the reference signal REs, performing one-dimensional Minimum Mean-Square Error (1D-MMSE) channel estimation in the frequency domain on each OFDM symbol in the received RB; and using data at least from the 1D-MMSE channel estimation in the frequency direction, performing channel estimation in the time domain on each frequency sub-carrier in the received RB.