Filter for impulse response shortening, with addition...

Details Filter for impulse response shortening, with addition... Filter for impulse response shortening, with addition...

H - Electricity

04

L

H04L 27/26 (2006.01) H03H 17/02 (2006.01) H04B 1/10 (2006.01) H04B 15/00 (2006.01)

Patent

CA 2722546

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 shortening filter. A reference signal generator may output a reference signal. A comparator may compare the output signal and the reference signal and output a resulting error signal. An adaptive processor may compute coefficients for the secondary impulse shortening filter based on the error signal.

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