Patent ID: 8451709
Filing Date: 2013-05-28
Classification: H04B,H04L

Abstract:
1. An OFDM radio receiving device comprising: a first Fourier transform unit for performing a first Fourier transform on the received OFDM signals used for estimating channel responses, which are modulated with different codes depending on transmit antennas and simultaneously transmitted; a code selecting unit for selecting any of the codes used in a transmitting side; a code multiplying unit for multiplying said selected code by the first Fourier transform of the OFDM signal; an inverse Fourier transform unit for performing an inverse Fourier transform on a multiplication result; a time window unit for extracting only a necessary signal from a delay profile signal obtained by the inverse Fourier transform; a second Fourier transform unit for performing a second Fourier transform on an output of the time window unit; and a channel response estimating unit for estimating a channel response from a result of the second Fourier transform.