Patent ID: 7929627

Claim:
A receiver for receiving an OFDM signal in which each Scattered Pilot Signal of a plurality of Scattered Pilot Signals is scattered every first predetermined number of carriers arranged in a frequency axis direction, and shifted by a second predetermined number of carriers as a symbol number increases by one, the receiver comprising: a first division unit operable to divide each Scattered Pilot Signal by a known signal, which is the same as a Scattered Pilot Signal at a time of transmission, to estimate channel characteristics of a position of each Scattered Pilot Signal; an interpolation unit operable (i) to perform oblique interpolation using the estimated channel characteristics, to interpolate channel characteristics of a first signal position whose channel characteristics have not been obtained, the position of the Scattered Pilot Signal and the first signal position being on a same straight line and having different symbol numbers and different carrier numbers, and (ii) to perform, in a frequency axis direction, frequency axis interpolation using the estimated channel characteristics and the interpolated channel characteristics, to interpolate channel characteristics of a second signal position whose channel characteristics have not been obtained; and a second division unit operable to divide an information transmission signal, which is included in the OFDM signal, by the interpolated channel characteristics.