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 used in sonar and radar, but has other applications, such as in spread spectrum communications. In spread spectrum usage, SAW devices such as RACs 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.
Read more about Chirp: Generation of A Chirp Signal
Famous quotes containing the word chirp:
“Please do not take counsel of women who are so prejudiced that, as I once heard said, they would not allow a male grasshopper to chirp on their lawn; but out of your own great heart, refuse to set an example to such folly.”
—Frances E. Willard (1839–1898)
“The small creatures chirp thinly through the dust, through the night.
O mother
What shall I cry?
We demand a committee, a representative committee, a committee of investigation
RESIGN RESIGN RESIGN”
—T.S. (Thomas Stearns)