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Figure 3.6: Sampling
The sine wave in figure 3.6 is sampled at the dot positions. By
connecting the adjacent samples, the original signal can be recon-
structed from the samples. You can see the result in figure
3.7 .
Figure 3.7: ”connecting” the samples
3.3 Sample frequency
The rate at which the samples are taken is called the sampling
frequency , the number of samples per second. A higher sampling
frequency corresponds to a shorter interval between the samples.
As is visible in figure
3.8 , with a higher sampling frequency, the
original signal can be reconstructed much better from the measured
samples.
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Chapter 3