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analysis:rhythms:step3 [2016/03/29 15:40] mvdm |
analysis:rhythms:step3 [2018/07/07 10:19] (current) |
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==== Motivating example: aliasing ==== | ==== Motivating example: aliasing ==== | ||
- | Let's start with an example that illustrates what can go wrong if you are not aware of some basic sampling theory ideas. To do so, we will first construct a 10Hz signal, sampled at 1000Hz. Recalling that the frequency //f// of a sine wave is given by $y = sin(2 \pi f t)$: | + | Let's start with an example that illustrates what can go wrong if you are not aware of some basic sampling theory ideas. To do so, we will first construct a 10Hz signal, sampled at 1000Hz (i.e. we are taking 1000 measurements per second). Recalling that the frequency //f// of a sine wave is given by $y = sin(2 \pi f t)$: |
<code matlab> | <code matlab> |