Range ambiguity resolution
Range ambiguity resolution detailed explanationrange ambiguity resolution process
Range ambiguity resolution is a technique used with medium Pulse repetition frequency (PRF) radar to obtain range information for distances that exceed the distance between transmit pulses.wikipedia
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This signal processing technique is required with pulse-Doppler radar.
* Range ambiguity resolution detailed explanation
PRFpulse repetition frequenciesmedium pulse repetition frequency
Range ambiguity resolution is a technique used with medium Pulse repetition frequency (PRF) radar to obtain range information for distances that exceed the distance between transmit pulses.
The range ambiguity resolution process is used to identify true range when PRF is above this limit.
Chinese remainder theorem - ApplicationsCRTlinear congruence theorem
The following is a special case of the Chinese remainder theorem.
The range ambiguity resolution techniques used with medium pulse repetition frequency radar can be seen as a special case of the Chinese remainder theorem.
This causes reflected signals to be folded, so that the apparent range is a modulo function of true range.
clight speedvelocity of light
Here c is the signal speed, which for radar is the speed of light.
The duty cycle is the ratio of the width of the transmit pulse width \Tau and the period between pulses.
The process shown above is a type of digital convolution algorithm.
This causes scalloping, where the radar can be blind for some combinations of speed and distance.
degrees of freedomdegree of freedomdegrees of freedom (
Multiple aircraft within the radar beam that are separated by over 500 meters introduces additional degrees of freedom that requires additional information and additional processing.
ambiguous velocityFrequency ambiguity resolution detailed explanationFrequency ambiguity resolution process explanation
This concept is related to range ambiguity resolution.
Ambiguity resolution detailed explanationAmbiguity resolution process explanation
The received signals from multiple PRF are compared using the range ambiguity resolution process.
Doppler CFAR detection processingPulse-Doppler signal processing detailed explanation
The sorted detections are processed with a range ambiguity resolution algorithm to identify the true range and velocity of the target reflection.
radar stationradarsradar system
Military applications require medium PRF which prevents range from being determined directly, and range ambiguity resolution processing is required to identify the true range of all reflected signals.
interferometric lengthlengthlength standards
Range ambiguity resolution