| 摘要 |
<p>An adaptive filter (1) may be realised by weighting the outputs from a tapped delay line ( ,W). This, however, allows nulls to corrupt a wanted signal spectral region. A fixed(non-adaptive) filter (2) coupled between the signal input and an input of means (3) for summing the weighted outputs serves to allow nulls only to be formed in the skirt region of the fixed filter response thus preserving a wanted signal. </p> |
