Patent ID: 7023929

Claim:
A method of designing a pre-compensation filter for a transmitter using Discrete Multitone (DMT) type modulation comprising the steps of: determining the inverse of the transfer function that needs to be compensated (H 1 ); truncating the inverse of transfer function to be compensated H 1 to the region of interest (H 2 ); designing desired band split component of pre-compensation filter (H 3 ); determining the target frequency response of the pre-compensation filter given by H 4 =H 2 *H 3 where H 4 is the multiplication of H 2 and H 3 ; given the target frequency response in H 4 , imposing Hermetian symmetry on the frequency response and then taking the inverse Fourier transform (IFFT) to generate a time domain filter, h 5 , wherein said h 5 has N FFT taps.