Contents
What is Nyquist resolution?
The absolute limiting resolution of a sensor is determined by its Nyquist limit. This is defined as being one half of the sampling frequency, a.k.a the number of pixels/mm (Equation 3). Most importantly, the Kell factor compensates for the space between pixels.
What is Nyquist criterion for sampling a low pass signal?
Simply stated, the Nyquist criterion requires that the sampling frequency be at least twice the highest frequency contained in the signal, or information about the signal will be lost. If the sampling frequency is less than twice the maximum analog signal frequency, a phenomenon known as aliasing will occur.
Is the Nyquist rate the same as the frequency?
Nyquist frequency. The Nyquist frequency should not be confused with the Nyquist rate, the latter is the minimum sampling rate that satisfies the Nyquist sampling criterion for a given signal or family of signals. The Nyquist rate is twice the maximum component frequency of the function being sampled.
What is the magnitude and phase of the Nyquist diagram?
the magnitude and phase are thus: Magnitude = 1 ω√ω2 + 1 Phase = tan − 1 − 1 − ω = 180° + tan − 1 1 ω When ω =∞ then the magnitude is 0 and the phase is 0°.
Which is the frequency of the sinusoidal function Nyquist?
The dashed red lines are the corresponding paths of the aliases. In this example, fs is the sampling rate, and 0.5 fs is the corresponding Nyquist frequency. The black dot plotted at 0.6 fs represents the amplitude and frequency of a sinusoidal function whose frequency is 60% of the sample-rate.
What does the black dot on the Nyquist frequency mean?
Nyquist frequency. The black dot plotted at 0.6 f s represents the amplitude and frequency of a sinusoidal function whose frequency is 60% of the sample-rate (f s ). The other three dots indicate the frequencies and amplitudes of three other sinusoids that would produce the same set of samples as the actual sinusoid that was sampled.