Patent ID: 7936851

Claim:
A method for use in an equalization of a channel by means of an equalizer, wherein said channel uses a certain frequency band for a transfer of signals, said method comprising: determining, by a signal processing apparatus, a channel response for at least three frequency points within said frequency band used by said channel; and setting, by a signal processing apparatus, adjustable coefficients of said equalizer such that an equalizer response compensates the determined channel response at said at least three frequency points; wherein determining said channel response comprises determining a channel phase response and a channel amplitude response for said channel; wherein said adjustable coefficients of said equalizer are set such that an equalizer amplitude response approaches an inverse of a determined channel amplitude response for all considered frequency points and that an equalizer phase response approaches a negative of a determined channel phase response for all considered frequency points; and wherein said setting of adjustable coefficients comprises for an equalization of phase of said channel setting a complex coefficient as a phase rotator part of said equalizer, setting at least one coefficient of a non-real complex allpass filter part of said equalizer, and setting at least one coefficient of a real allpass filter part of said equalizer.