METHOD AND CIRCUIT DEVICE FOR CORRECTING PHASE AND/OR FREQUENCY ERROR OF DIGITAL MULTICARRIER SIGNAL

摘要

PROBLEM TO BE SOLVED: To evaluate and correct the full phase error generated from a self noise component and an external noise by using another Fourier transform for evaluating the self noise component and correcting a digital signal depending on the self noise component. SOLUTION: In order to evaluate the self noise component, another Fourier transform is used and the digital signal is corrected depending on this evaluated self noise component. However, its load is allowable. Fourier transform for converting errors are desirably executed before Fourier transform for demodulation. For example, relating to a circuit device to be used, after reduced FFT at a fast Fourier transform unit FFT 1', rough channel evaluation and the decision of a common phase error are executed by another block EST.