Filter for impulse response shortening, with addition spectral constraints, for multicarrier transmission

Abstract From the Canadian patent

A channel in a multiple carrier communication system is equalized by computing a desired spectral response shortening the impulse response of the channel so that a significant part of an energy of the impulse response is confined to a region that is shorter than a target length and filtering the signal based on the desired spectral response. A multiple carrier communication system may include a primary impulse shortening filter that receives an output signal of an analog to digital converter and accepts coefficients. A secondary impulse shortening filter may receive the output signal of the analog to digital converter output an output signal, and pass coefficients to the primary impulse …