In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal. A common example is the conversion of a sound wave to a sequence of "samples". A sample is a value of the See more

In practice, the continuous signal is sampled using an analog-to-digital converter (ADC), a device with various physical limitations. … See more

When a bandpass signal is sampled slower than its Nyquist rate, the samples are indistinguishable from samples of a low-frequency alias of the high-frequency signal. That is often … See more

Complex sampling (or I/Q sampling) is the simultaneous sampling of two different, but related, waveforms, resulting in pairs of samples that are subsequently treated as complex numbers. When one waveform, $${\displaystyle {\hat {s}}(t)}$$, is the Hilbert transform See more

Functions of space, time, or any other dimension can be sampled, and similarly in two or more dimensions.
For functions that … See more

Audio sampling
Digital audio uses pulse-code modulation (PCM) and digital signals for sound reproduction. This … See more

Oversampling is used in most modern analog-to-digital converters to reduce the distortion introduced by practical digital-to-analog converters, … See more