Patent ID: 7817738

Claim:
A digital broadcasting receiving apparatus with a channel estimation function comprising: a Fourier transform circuit for performing Fourier transform of an orthogonal demodulation signal from a time axis signal to a frequency axis signal, said orthogonal demodulation signal being obtained by orthogonal demodulation of an orthogonal frequency division multiplexing signal including a plurality of carriers for transmitting information with distributing the information and a pilot signal serving as a reference of amplitude/phase; a mode output section for generating and outputting a signal indicating a transmission mode of the orthogonal frequency division multiplexing signal in response to automatic detection from the orthogonal demodulation signal or to manual designation; and a channel estimation section for extracting the pilot signal from the frequency axis signal fed from said Fourier transform circuit, for generating from extracted phase and amplitude of the pilot signal a delay profile signal representing characteristics of delayed wave received power against delay time, for providing a present vehicle speed data of a mobile vehicle for generating a decision signal about presence/absence of ghosts by making a decision from the signal indicating the transmission mode and the vehicle speed data as to whether ghosts appearing during traveling of the mobile vehicle are present or not in the delay profile signal, and for storing or outputting the delay profile signal and the decision signal as channel estimation information.