SIGNAL PROCESSING METHOD, DATA PROCESSING METHOD AND DATA PROCESSING APPARATUS

摘要

The present invention discloses a signal processing method and a data processing method and apparatus. A time-domain to frequency-domain signal processing method includes: pre-processing time-domain data; pre-rotating the pre-processed data by using a rotation factor a ‹ W N n + 0.5 ; performing a discrete Fourier transform (DFT) of N/4 points on the pre-rotated data; and post-rotating the data transformed by the DFT by using a rotation factor b ‹ W N k + 0.5 to obtain frequency-domain data. A frequency-domain to time-domain signal processing method includes: twiddling frequency-domain data; pre-rotating the twiddled data by using a rotation factor c ‹ W N k + 0.5 ; performing a DFT of N/4 points on the pre-rotated data; and post-rotating the data transformed by the DFT by using a rotation factor d ‹ W N n + 0.5 ; and post-processing the post-rotated data to obtain time-domain data. The present invention increases the efficiency of signal processing.