Chirp - definitie. Wat is Chirp
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  • etymologie

Wat (wie) is Chirp - definitie

CHANGE IN A SIGNAL'S FREQUENCY OVER TIME
Chirp rate; Chirpless; Chirped radar; Chirps; Chirp signal; Chirpyness; Chirp pulse
  • sinc pulse]] when no relative phase shift is left.
  • [[Spectrogram]] of an exponential chirp. The exponential rate of change of frequency is shown as a function of time, in this case from nearly 0 up to 8 kHz repeating every second. Also visible in this spectrogram is a frequency fallback to 6 kHz after peaking, likely an artifact of the specific method employed to generate the waveform.
  • A linear chirp waveform; a sinusoidal wave that increases in frequency linearly over time
  • [[Spectrogram]] of a linear chirp. The spectrogram plot demonstrates the linear rate of change in frequency as a function of time, in this case from 0 to 7 kHz, repeating every 2.3 seconds. The intensity of the plot is proportional to the energy content in the signal at the indicated frequency and time.
  • (a) In image processing, direct periodicity seldom occurs, but, rather, periodicity-in-perspective is encountered. (b) Repeating structures like the alternating dark space inside the windows, and light space of the white concrete, "chirp" (increase in frequency) towards the right. (c) Thus the best fit chirp for image processing is often a projective chirp.

Chirp         
·noun A short, sharp note, as of a bird or insect.
II. Chirp ·vi To make a shop, sharp, cheerful, as of small birds or crickets.
chirp         
(chirps, chirping, chirped)
When a bird or an insect such as a cricket or grasshopper chirps, it makes short high-pitched sounds.
The crickets chirped faster and louder.
= chirrup
VERB: V
Chirp is also a noun.
The chirps of the small garden birds sounded distant.
N-COUNT
chirping
...the chirping of birds.
N-UNCOUNT
chirp         
¦ verb
1. (of a small bird or a grasshopper) utter a short, sharp, high-pitched sound.
2. say something in a lively and cheerful way.
¦ noun a chirping sound.
Derivatives
chirper noun
Origin
ME: imitative.

Wikipedia

Chirp

A chirp is a signal in which the frequency increases (up-chirp) or decreases (down-chirp) with time. In some sources, the term chirp is used interchangeably with sweep signal. It is commonly applied to sonar, radar, and laser systems, and to other applications, such as in spread-spectrum communications (see chirp spread spectrum). This signal type is biologically inspired and occurs as a phenomenon due to dispersion (a non-linear dependence between frequency and the propagation speed of the wave components). It is usually compensated for by using a matched filter, which can be part of the propagation channel. Depending on the specific performance measure, however, there are better techniques both for radar and communication. Since it was used in radar and space, it has been adopted also for communication standards. For automotive radar applications, it is usually called linear frequency modulated waveform (LFMW).

In spread-spectrum usage, surface acoustic wave (SAW) devices are often used to generate and demodulate the chirped signals. In optics, ultrashort laser pulses also exhibit chirp, which, in optical transmission systems, interacts with the dispersion properties of the materials, increasing or decreasing total pulse dispersion as the signal propagates. The name is a reference to the chirping sound made by birds; see bird vocalization.

Voorbeelden uit tekstcorpus voor Chirp
1. She laughs nervously as fellow campers chirp words of encouragement.
2. BOGOTA, Colombia –– There‘s a new chirp in the forest.
3. WASHINGTON –– The chirp of the chickadee is charming to humans.
4. PM WASHINGTON –– The chirp of the chickadee is charming to humans.
5. By Maria Terrone Blossoms shake free from chrysalis of plastic bags; birds out–chirp cellphones.