näytteistysvälillä

Näytteistysvälillä refers to the sampling interval, which is the duration between successive samples of a signal. In digital signal processing, a continuous analog signal is converted into a discrete digital signal by taking measurements at regular intervals. This interval is crucial as it determines the frequency at which the signal is sampled. The Nyquist-Shannon sampling theorem states that to perfectly reconstruct a signal from its samples, the sampling frequency must be at least twice the highest frequency present in the signal. This minimum sampling frequency is known as the Nyquist rate. If the sampling interval is too large (meaning the sampling frequency is too low), aliasing can occur. Aliasing is a phenomenon where higher frequencies in the original signal are misinterpreted as lower frequencies in the sampled signal, leading to distortion and loss of information. Therefore, choosing an appropriate sampling interval is essential for accurate representation and processing of digital signals. The reciprocal of the sampling interval is the sampling frequency. For instance, a sampling interval of 0.01 seconds corresponds to a sampling frequency of 100 Hz.