Method for processing a digital input signal of a channel equalizer
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United States of America Patent
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Aug 14, 2007
Grant Date -
Feb 12, 2004
app pub date -
Jul 26, 2001
filing date -
Jul 28, 2000
priority date (Note) -
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Abstract
A baseband digital signal block is processed at an output of a matched filter and at an input of a channel equalizer. This signal is fed to a whitening filter estimated for the block by taking into account interfering signals in the frequency band of the useful signal and in one or more adjacent bands. To this end, an autocorrelation vector, calculated form the block of received signal is projected onto different directions corresponding to predetermined correlation vectors relating to the useful signal, to signals which may be present in the adjacent bands and to the thermal noise. The coefficients of the whitening filter are then derived from the sum of the projected vectors, by taking into account the energy of the useful signal if the latter has not been cancelled prior to the computation of the autocorrelations.
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