Search results
Results from the WOW.Com Content Network
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).
The chirp pulse compression process transforms a long duration frequency-coded pulse into a narrow pulse of greatly increased amplitude. It is a technique used in radar and sonar systems because it is a method whereby a narrow pulse with high peak power can be derived from a long duration pulse with low peak power.
They have a phase angle close to a value of π /4 within the chirp range / and they only start to change significantly for frequencies beyond this range. Consequently, for frequencies within the sweep range of the chirp, it is the square-law phase term Φ 1( ω ) and its group delay function ( = -d Φ 1/d( ω ) ) that are of most interest.
Clearview AI, Inc. is an American facial recognition company, providing software primarily to law enforcement and other government agencies. [2] The company's algorithm matches faces to a database of more than 20 billion images collected from the Internet, including social media applications. [1]
Chirp Magazine is a popular Canadian children's and science magazine founded in 1997 as a comic book. [1] Aimed at young children, it is published 10 times per year. Chirp is the youngest member in a family of magazines that includes OWL and Chickadee . [ 1 ]
Chirp is a Canadian animated children's television series created by J.J. Johnson. The series is based on the Canadian children's magazine Chirp. It was previewed on Kids' CBC on March 6, 2015, and premiered on April 20. [1] A Spanish dubbed version start airing on V-me in the United States in 10 May 2019. [citation needed]