coherent radar

Also found in: Acronyms.

coherent pulse radar

coherent pulse radarclick for a larger image
A typical layout of coherent pulse radar.
A form of pulse radar in which the radio frequency oscillations in a recurrent pulse bear a constant pulse relation to those of a continuous oscillation. Pulse Doppler radar is of this form. Also called coherent radar.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Zhang, "Modelling and simulation of spatial-temporal correlated K distributed clutter for coherent radar seeker," IET Radar, Sonar and Navigation, vol.
Bartoli, "Detection of vertical bending and torsional movements of a bridge using a coherent radar," NDT and E International, vol.
Coherent radar systems use a fast Fourier transform (FFT) to transform signals from the time domain into the frequency domain.
Bucciarelli, "Adaptive polarimetric target detection with coherent radar. I: Detection against Gaussian background," IEEE Transactions on Aerospace and Electronic Systems, Vol.
Balsley, "Design Considerations for Coherent Radar Systems for Probing the Troposphere, Stratosphere and Mesosphere," Preprints, 18th Conference on Radar Meteorology, (Atlanta), AMS, Boston, 1978, pp.
Non-coherent radars are only able to obtain range profiles (one-dimensional arrays), whereas coherent radar may obtain range-Doppler images (two-dimensional images).
The coherent radar has three main modes, including pulse Doppler for detecting low level targets in clutter> frequency-agile pulse for detecting high altitude targets out of clutter> and frequency-agile narrow pulse for detecting maritime targets.
Traveling wave tube or klystron amplifiers are used for most coherent radar RF power pulse transmitters.
A number of advanced W-band solid-state coherent radar transceivers have been described and are presently under development.[1-5] These techniques made it possible to generate all the sophisticated waveforms at a frequency of 94 GHz, which was previously only possible at microwave frequencies.
The resultant loss in J/S (jam-to-radar-signal) ratio of the former, due to the dilution of signal power over large bandwidth, and the inability of the latter to replicate coherent radar signals mitigates against their utility to deceive missile seekers.
Coherent radar sources generate the input signals to an EW receiver.
In addition, with the introduction of coherent radars, especially those found in pulse-Doppler fire-control a nd active missile-guidance systems, the simple approach of delaying the radar pulse lost its effectiveness.

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