nyquist rate

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nyquist rate

The engineer calculated the Nyquist rate for the audio signal.

Definition
  1. Noun:
    • (Telecommunications): The minimum sampling frequency required to accurately convert a continuous analog signal into a discrete digital signal without loss of information. Specifically, it is twice the highest frequency component present in the original analog signal.
Usage Examples
  • Noun:
    • To digitize this audio signal without aliasing, you must sample at or above the Nyquist rate.
    • The engineer calculated the Nyquist rate for the bandwidth of the communication channel.
    • A common pitfall in signal processing is sampling below the Nyquist rate, which causes distortion.
Advanced Usage
  • "To satisfy the Nyquist rate": To meet or exceed the minimum required sampling frequency.
    • The design specification requires the analog-to-digital converter to satisfy the Nyquist rate for all expected input signals.
  • "Nyquist rate criterion": The rule or condition defined by the Nyquist rate.
    • Adherence to the Nyquist rate criterion is fundamental for faithful signal reproduction.
Variants and Related Words
  • Nyquist frequency (n): A related term, specifically defined as half of the sampling rate. It represents the maximum frequency that can be accurately represented at a given sampling rate.
    • The signal's frequency must be less than the Nyquist frequency to avoid aliasing.
  • Nyquist-Shannon sampling theorem (n): The foundational theorem in information theory that establishes the Nyquist rate as a necessary condition for perfect signal reconstruction.
    • The Nyquist-Shannon sampling theorem is a cornerstone of digital signal processing.
Synonyms
  • Minimum sampling rate: The lowest acceptable rate for sampling.
  • Critical sampling frequency: The threshold frequency for accurate sampling.
Related Concepts
  • Aliasing (n): The distortion or artifact that occurs when a signal is sampled at a rate below its Nyquist rate.
    • Aliasing was evident in the digitized image because the sampling rate was too low.
  • Sampling theorem (n): The general principle underlying the Nyquist rate.
    • The sampling theorem provides the theoretical basis for converting analog signals to digital.
nyquist rate

The engineer calculated the Nyquist rate for the audio signal.

Noun
  1. (telecommunication) the lowest sampling rate that will permit accurate reconstruction of a sampled analog signal

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