A method for estimating channels of an OFDM signal. The method comprises
the steps of deriving responses of pilot channels, deriving responses of
first data channels by time and frequency domain combined linear
interpolation among the responses of the pilot channels, deriving each
response of boundary channels by frequency domain linear interpolation
between the responses of the nearest pilot and first data channels, and
deriving responses of second data channels by frequency domain
extrapolation using the responses of the pilot and first data channels.