Receiving apparatus and receiving method

摘要

An object of the present invention is to provide a receiving apparatus and a receiving method capable of preventing phase rotation of a signal after FFT from occurring on a frequency domain. Further, the receiving apparatus according to the present invention is provided with: a window control unit configured to control a position of an FFT window in which FFT is performed to the time domain signal, and output FFT data corresponding to the FFT window; a signal delaying unit configured to generate, from the time domain signal, a plurality of delay signals with different delay amounts; and a signal switching unit having a switch for outputting by switching between two of the time domain signal and the plurality of delay signals based on a predetermined switch timing, the signal switching unit being configured to output the FFT data including the output signal of the switch.

主权项

1. A receiving apparatus for receiving an orthogonal frequency division multiplexing (OFDM) modulated signal modulated based on an OFDM method, and generating decoded data obtained by decoding the OFDM modulated signal, the apparatus comprising:
a quadrature demodulator that receives a signal obtained by converting said OFDM modulated signal into a predetermined frequency band, and performs quadrature demodulation on a time domain of said OFDM modulated signal to output a time domain signal; a window controller that positions a fast fourier transform (FFT) window in which FFT is performed to said time domain signal outputted from said quadrature demodulator, and outputs FFT data corresponding to the FFT window; an fast fourier transformer that performs FFT to said FFT data outputted from said window controller, and output frequency domain data; and a decoder configured to decode said frequency domain data outputted from said fast fourier transformer, wherein said window controller includes: a signal delayer that generates, from said time domain signal, a plurality of delay signals with different delay amounts; and a signal switcher that outputs, by switching between two signals different in delay amount by a single effective symbol in said time domain signal and said plurality of delay signals based on a predetermined switch timing, said FFT data including the output signal of the switch.