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اعوجاج پالس
In this case, it is obvious that pulse distortions above certain tolerances will cause decoding errors.
Because the pulse distortions are strictly related with the error occurrence, in the following simulations, this criterion will be used as an evaluation instrument.
The output of the filter that uses a higher cutoff frequency coefficient has steeper edges which explain the smaller pulse distortions.
Figure 4.12 illustrates the influence of the sampling frequency on the pulse distortion in the case of a 2nd order Butterworth filter with a cutoff frequency of 1.5�F, with respect to the SNR.
It can be observed that by doubling the sampling frequency, the average pulse distortion can be reduced with 1/3.
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