Discrete-time signal

Discrete sampled signal
"Discrete signal" redirects here. It is not to be confused with Digital signal (electronics).

A discrete signal or discrete-time signal is a time series consisting of a sequence of quantities. In other words, it is a time series that is a function over a domain of integers.

Unlike a continuous-time signal, a discrete-time signal is not a function of a continuous argument; however, it may have been obtained by sampling from a continuous-time signal, and then each value in the sequence is called a sample. When a discrete-time signal obtained by sampling a sequence corresponds to uniformly spaced times, it has an associated sampling rate; the sampling rate is not apparent in the data sequence, and so needs to be associated as a characteristic unit of the system.


Discrete-time signals may have several origins, but can usually be classified into one of two groups:[1]

See also


  1. "Digital Signal Processing" Prentice Hall - Pages 11-12
  2. "Digital Signal Processing: Instant access." Butterworth-Heinemann - Page 8
This article is issued from Wikipedia - version of the 12/3/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.