| 摘要 |
<p>A system for processing a signal comprises a first band pass filter BFP1 arranged to filter the signal, a second band pass filter BFP2 arranged to filter the output of the first band pass filter BFP1, a first peak detection unit PD1 arranged to detect a peak in the output of the second band pass filter BFP2, a subtractor (10) arranged to subtract the output of the second band pass filter BFP2 from the output of the first band pass filter BFP1, a second peak detection unit PD2 arranged to detect a peak in the output of the subtractor (10), and a comparison unit CMP arranged to compare the output of the first peak detection unit PD1 with the output of the second peak detection unit PD2.</p> |
