# 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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Dopplerpulse-Dopplerpulse doppler
This signal processing technique is required with pulse-Doppler radar.
* Range ambiguity resolution detailed explanation

### Pulse repetition frequency

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

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.

### Modular arithmetic

modulomodcongruent
This causes reflected signals to be folded, so that the apparent range is a modulo function of true range.

### Speed of light

clight speedvelocity of light
Here c is the signal speed, which for radar is the speed of light.

### Duty cycle

duty-cycleduty cycling
The duty cycle is the ratio of the width of the transmit pulse width \Tau and the period between pulses.

### Convolution

convolvedconvolvingkernel
The process shown above is a type of digital convolution algorithm.

scallopingblind velocities
This causes scalloping, where the radar can be blind for some combinations of speed and distance.

### Degrees of freedom (physics and chemistry)

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.

### Frequency ambiguity resolution

ambiguous velocityFrequency ambiguity resolution detailed explanationFrequency ambiguity resolution process explanation
This concept is related to range ambiguity resolution.

### Ambiguity resolution

Ambiguity resolution detailed explanationAmbiguity resolution process explanation
The received signals from multiple PRF are compared using the range ambiguity resolution process.

### Pulse-Doppler signal processing

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.