| 摘要 |
A V.34 compliant modem uses a noise whitening filter to compensate for noise enhancement in an equalizer. The noise whitening filter uses a 3 tap FIR the response of which is determined by 3 coefficients. The coefficients are derived using a newly developed extension of the Levinson-Durbin algorithm to complex numbers. The coefficients thus derived are used to control the precoder as well as the noise whitening filter. The coefficients are also used to control precoding reconstruction after the decoder.
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