In the propagation path presumption vessel which presumes the frequency transfer function of the radio propagation path in

摘要

PPROBLEM TO BE SOLVED: To provide a propagation path estimator for highly accurately estimating a frequency transmission function that is a propagation path response, even if several sub-carriers in both ends of a frequency band are unavailable. PSOLUTION: The propagation path estimator which estimates a frequency transmission function of a wireless propagation path, includes: a reference signal matrix generator 6 for generating a reference signal matrix from predetermined known signals; a general inverse matrix computing element 7 for computing a general inverse matrix of the reference signal matrix using a special value that exceeds a predetermined threshold, in the reference signal matrix and a special vector corresponding to the special value; a matrix product computing element 8 for determining an impulse response of the propagation path resulting from modeling due to a transversal filter model using the known signals included in a reception signal and the general inverse matrix; and a frequency area converter 9 for determining frequency transmission characteristics of the propagation path by converting the estimated impulse response into a frequency area. PCOPYRIGHT: (C)2005,JPO&NCIPI