Patent ID: 7684503
Filing Date: 2010-03-23
Classification: H04L

Abstract:
1. An OFDM reception apparatus for receiving and demodulating an OFDM (Orthogonal Frequency Division Multiplexing) signal composed of a plurality of carriers including a carrier transmitting a pilot signal which is inserted at predetermined symbol intervals, comprising: a fast Fourier transform section for converting a received OFDM signal into a frequency-domain OFDM signal and outputting the frequency-domain OFDM signal; a channel response calculation section for obtaining a channel response with respect to the carrier transmitting the pilot signal, from the frequency-domain OFDM signal; an interpolation section for interpolating the channel response with respect to the carrier transmitting the pilot signal, and outputting the result; a power calculation section for calculating the square of a magnitude of the interpolated channel response obtained in the interpolation section, as a carrier power, for each carrier corresponding to the channel response; an interference calculation section for calculating a degree of an influence of interference on the received OFDM signal, as an interference power, for each carrier corresponding to the interpolated channel response; and a carrier quality calculation section for calculating a ratio of the carrier power obtained in the power calculation section to the interference power corresponding thereto obtained in the interference calculation section, for each carrier.