| 摘要 |
<p>A low pass digital filter (180) using cascade polyphase recursive digital signal processing circuit. The filter in the receive direction may contain a re-sampling Hogenauer filter (220) followed by an equalizer filter (230) to correct for its non-flat pass-band spectral response. The output of the spectral equalizer may be processed by a poly-phase re-sampling filter (240) to reduce the sample rate. A clean-up filter (250) may insert two stop-band spectral intervals in the frequency response of the earlier stages. The filter (130) in the receive direction may be implemented by using similar components in the reverse order.</p> |
