Howtosignalprocessing
- How do you find the alias of a frequency?
- What is the relationship between frequency and aliasing?
- How does aliasing occur?
- What is the meaning of aliasing?
How do you find the alias of a frequency?
where fN is the folding frequency, fs is the signal frequency, and m is an integer such that fa < fN. For example, suppose that fs = 65 Hz, fN = 62.5 Hz, which corresponds to 8-ms sampling rate. The alias frequency then is fa = |2 × 62.5 − 65| = 60 Hz.
What is the relationship between frequency and aliasing?
Aliasing is the effect of new frequencies appearing in the sampled signal after reconstruction, that were not present in the original signal. It is caused by too low sample rate for sampling a particular signal or too high frequencies present in the signal for a particular sample rate.
How does aliasing occur?
Answer : Aliasing occurs when an oscilloscope does not sample the signal fast enough to construct an accurate waveform record. The signal frequency is misidentified, and the waveforms displayed on an oscilloscope become indistinguishable. Aliasing is basically a form of undersampling.
What is the meaning of aliasing?
noun. ali·as·ing ˈā-lē-ə-siŋ ˈāl-yə- : an error or distortion created in a digital image that usually appears as a jagged outline. We commonly observe aliasing on television.
