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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 . [ 1 ] It is commonly applied to sonar , radar , and laser systems, and to other applications, such as in spread-spectrum communications (see chirp spread spectrum ).
In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information. [1] A chirp is a sinusoidal signal whose frequency increases or decreases over time (often with a polynomial expression for the relationship between time and frequency).
Chirp is a U.S. based audiobook retail service. [1] It allows users to and stream audiobooks directly from the website or in the app, and is an a la carte retailer, not a subscription based model. [2] The company does not rely on monthly subscriptions and provides discounted prices to its users. [3] [4]
Chirping is normal, but if your cat doesn’t chirp at all that doesn’t mean they are abnormal. It’s one of the many remarkable ways cats interface with the world.
CHIRP (algorithm), an algorithm used to perform a deconvolution on radio astronomy images; Chirp (company), a UK technology company; Chirp (phone), a walkie-talkie service on Sprint-Nextel's iDEN-phones; ChiRP-Seq, a biological methodology to identify DNA regions or proteins that are bound to a RNA molecule of interest
For better identification of chirp transmitters the following notation is used: <repetition rate (s)>:<chirp offset (s)>, where the repetition rate is the time between two sweeps in seconds and the chirp offset is the time of the first sweep from 0 MHz after a full hour in seconds.
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The former first lady was notably absent from President Jimmy Carter's state funeral service, leading Barack Obama and Donald Trump to be seated next to one another