Patent ID: 7864733

Claim:
A mobile station apparatus comprising: a reception section that receives a known signal, which is formed with a plurality of subcarriers and in which part of the plurality of subcarriers is set as a blank subcarrier that is placed in a transmission-off state and becomes blank, from a base station of an own cell in which the mobile station apparatus is located, and from a base station of another cell; and a cell search section that performs cell search for the other cell using the known signal received from the base station of the other cell in a blank subcarrier portion of the known signal received from the base station of the own cell, wherein the cell search section: detects fast Fourier transform timing candidates; at the fast Fourier transform timings, finds a plurality of correlation values by performing correlation calculation between a plurality of known signals received from the base station of the other cell in the blank subcarrier portion; makes frame timings corresponding to the correlation values equal to or above a threshold, from among the plurality of correlation values, as frame timing candidates; makes frame timings that are not frame timings for the own cell, from among the frame timing candidates, as frame timings for the other cell; and identifies a scrambling code providing a maximum correlation value, from among the frame timings for the other cell, as a scrambling code for the other cell.