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VulcanSphere (talk | contribs) m Adding local short description: "Function of propagation delay and Doppler frequency", overriding Wikidata description "function of propagation delay and Doppler frequency, representing the distortion of a returned pulse due to the receiver matched filter of the return from a moving target" |
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{{Short description|Function of propagation delay and Doppler frequency}}
In pulsed [[radar]] and [[sonar]] signal processing, an '''ambiguity function''' is a two-dimensional function of [[propagation delay]] <math>\tau</math> and [[Doppler frequency]] <math>f</math>, <math>\chi(\tau,f)</math>. It represents the [[distortion]] of a returned pulse due to the receiver [[matched filter]]<ref>[[Philip Woodward|Woodward P.M.]] ''Probability and Information Theory with Applications to Radar'', Norwood, MA: Artech House, 1980.</ref> (commonly, but not exclusively, used in [[pulse compression]] radar) of the return from a moving target. The ambiguity function is defined by the properties of the [[Pulse (signal processing)|pulse]] and of the filter, and not any particular target scenario.
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