Patent ID: 8000224
Filing Date: 2011-08-16
Classification: H04L

Abstract:
1. A receiver receiving symbols for propagation path estimation which include subcarriers modulated by different known signals and have been transmitted from two or more transmitting antennas and estimating propagation paths from said transmitting antennas, the receiver comprising: a Fourier transform section Fourier-transforming the received symbols for propagation path estimation to calculate first frequency information for each of the subcarriers; a signal generating section generating known signals which have been used for modulation of subcarriers included in the symbols for propagation path estimation; a dividing section dividing said first frequency information by one of said known signals to calculate second frequency information; an extrapolating section calculating and extrapolating, from said first frequency information or said second frequency information, information of frequency responses from said transmitting antennas in positions outside the signal band to generate third frequency information; and an inverse Fourier transform section inverse-Fourier-transforming said third frequency information, wherein said extrapolating section has an interpolation information generating section selecting subcarriers on the basis of a combination of known signals which have modulated subcarriers in the same position of symbols for propagation path estimation transmitted from said antennas and generating frequency information to be interpolated using frequency information of the selected subcarriers.