converting the digital input signal from a time domain into a frequency domain includes determining a complex transformation value, where said noise signal is, for each determined frequency band, filtered out of {HEAD ~ said complex transformation value} by subtracting a first correction value from a real part of said complex transformation value to obtain {TAIL ~ a corrected real value} and by subtracting a second correction value from an imaginary part of said complex transformation value to obtain a corrected imaginary value, and 
converting the digital input signal from a time domain into a frequency domain includes determining a complex transformation value , where said noise signal is , for each determined frequency band , filtered out of { HEAD ~ said complex transformation value } by subtracting a first correction value from a real part of said complex transformation value to obtain { TAIL ~ a corrected real value } and by subtracting a second correction value from an imaginary part of said complex transformation value to obtain a corrected imaginary value , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH