# Frequency ambiguity resolution

**ambiguous velocityFrequency ambiguity resolution detailed explanationFrequency ambiguity resolution process explanation**

Frequency ambiguity resolution is used to find true target velocity for medium pulse repetition frequency (PRF) radar systems.wikipedia

11 Related Articles

### Pulse repetition frequency

**PRFpulse repetition frequenciesmedium pulse repetition frequency**

Frequency ambiguity resolution is used to find true target velocity for medium pulse repetition frequency (PRF) radar systems.

For example, an L-Band radar with 500 Hz pulse rate produces ambiguous velocity above 75 m/s (170 mile/hour), while detecting true range up to 300 km.

### Pulse-Doppler radar

**Dopplerpulse-Dopplerpulse doppler**

This is used with pulse-Doppler radar.

* Frequency ambiguity resolution detailed explanation

### Modular arithmetic

**modulomodcongruent**

The radial velocity measurements made in this way produce a modulo function of the true radial velocity.

### Aliasing

**aliasaliasedtemporal aliasing**

Radar pulsing causes a phenomenon called aliasing, which occurs when the Doppler frequency created by reflector motion exceeds the pulse repetition frequency (PRF).

### Range ambiguity resolution

**Range ambiguity resolution detailed explanationrange ambiguity resolution process**

This concept is related to range ambiguity resolution.

### Nyquist rate

**Nyquist sampling rateNyquist limitNyquist**

This limitation is called the Nyquist sampling rate.

### Nyquist frequency

**Nyquist limitNyquistN/2 different frequencies**

Frequency is folded for high speed targets where radial velocity produces a frequency shift above the Nyquist frequency.

### Modulo operation

**modulomodmodulus**

The true speed of the target may be folded by a modulo operation produced by the sampling process.

### Convolution

**convolvedconvolvingconvolution kernel**

This could also be implemented as a convolution function, where the spectrum amplitudes from one PRF are applied to spectrum samples from the other PRF as a sliding window function.

### Pulse-Doppler signal processing

**Doppler CFAR detection processingPulse-Doppler signal processing detailed explanation**

* Frequency ambiguity resolution process explanation

### Ambiguity resolution

**Ambiguity resolution detailed explanationAmbiguity resolution process explanation**

The received signals are also compared using the frequency ambiguity resolution process.