A METHOD AND A DEVICE FOR SIGNAL PROCESSING

摘要

Through a method for signal processing a number of samples are taken from a signal in digital state and Discrete Fourier Transformations having a restricted word length are applied on the samples, a mean value of the results of these transformations is calculated, the calculated mean value is compared with a known ideal value for a result of a said transformation of said signal without any systematical error emanation from a restricted word length, and in connection with subsequent Discrete Fourier Transformations having a restricted word length of signals a correction is made depending upon the deviation between said mean value and the ideal value established by said comparison.