Patent ID: 8102898

Claim:
A corrected channel estimating apparatus for estimating transmission paths of a multipath, comprising: a channel estimation unit for calculating channel estimates for a plurality of transmission paths from a signal arriving through a multipath; and a channel estimate correction unit for removing side-lobe components mutually leaking into the transmission paths, from the channel estimates calculated by said channel estimation unit, to correct the channel estimates, wherein said channel estimate correction unit calculates values, which exclude the side-lobe components mutually leaking into the transmission paths from the channel estimates, by using the channel estimates for a plurality of the transmission paths calculated by said channel estimation unit and by using timing differences between the plurality of respective transmission paths, wherein said channel estimate correction unit generates coefficients by using timing differences between the plurality of respective transmission paths, and removes the leaking side-lobe components from the channel estimates by calculating the sums of products of the coefficients and the channel estimates calculated by said channel estimation unit, and wherein said channel estimate correction unit comprises: side-lobe correlation matrix generation unit for generating a correlation matrix indicative of the amounts of leaking side-lobe components due to the timing differences between the plurality of respective transmission paths, an inverse matrix processing unit for calculating an inverse matrix of the correlation matrix generated by said side-lobe correlation matrix generation unit, and a decorrelate processing unit for removing the leaking side-lobe components from the channel estimates by calculating the sums of products of the inverse matrix calculated by said inverse matrix processing unit and the channel estimates calculated by said channel estimation unit.