MCQs on MTI, Pulse Doppler Radars
MCQs on MTI, Pulse Doppler Radars, Objectives Questions on MTI, Pulse Doppler Radars, Engineering MCQ, Radar MCQ, Radar Engineering MCQ
Multiple Choice Questions MTI andPulse Doppler Radar
- The characteristic feature of coherent MTI radars is that the
- transmitted signal should be out of phase with the reference signal in the receiver.
- the transmitted signal should be equal in magnitude to the reference signal.
- the transmitted signal should be coherent with the reference signal in the receiver.
- the transmitted signal should not be equal to the reference signal in the receiver.
Answer: the transmitted signal should be coherent with the reference signal in the receiver.
2. The Doppler frequency shift produced by a moving target may be used in pulse radar to
- combine moving targets from desired stationary objects.
- determine the relative velocity of a target.
- separate desired moving targets from desired stationary objects.
- determine the displacement of a target.
Answer: determine the relative velocity of a target.
3. The limitation of the pulse MTI radar that does not occur with the CW radar
- is blind speed
- is delay lines
- requires more operating powers
- requires complex circuitry
Answer: is blind speed
4. The output of the MTI receiver phase detector should be quantized into a sequence of digital words by using
- a digital quantizer
- a digital phase detector
- digital delay lines
- a digital filter
Answer: digital delay lines
5. A simple MTI delay line canceller is an example of
- a frequency domain filter
- a high-pass filter
- an active filter
- a time-domain filter
Answer: a time-domain filter
6. The effect of blind speed can be significantly reduced in
- pulse MTI radars
- delay line cancellers
- staggered PRF–MTI
- pulse cancellers
Answer: staggered PRF–MTI
7. It provides stated probabilities of detection and false alarm:
- clutter attenuations
- clutter ratio
- cancellation ratio
- clutter visibility factor
Answer: clutter visibility factor
8. An MTI radar that uses amplitude fluctuations is
- coherent
- a pulse Doppler
- non coherent
- a CW radar
Answer: non coherent
9. The blind speeds of two independent radars operating at the same frequency will be different if their
- amplitudes are different
- blind speeds are different
- pulse repetition frequencies are different
- pulse intervals are different
Answer: pulse repetition frequencies are different
10. The clutter-rejection notches may be widened by passing the output of the delay line canceller through a
- Coho
- Stalo
- second delay line canceller
- pulse canceller
Answer: second delay line canceller
11. Two- and three-pulse cancellers are examples of
- CW radars
- FM–CW radars
- MTI filters
- pulse radars
Answer: MTI filters
12. The following techniques are Doppler filtering techniques that reject stationary clutter and where radial velocity is not measured:
- moving target indicator (MTI)
- CW radar
- MTD
- pulse Doppler
Answer: moving target indicator (MTI)
13. The following are regions of Doppler space where targets with those Doppler velocities cannot be detected:
- blind speeds
- delay line cancellers
- staggered PRF
- clutter visibility factor
Answer: blind speeds
14. Ambiguities in range and Doppler velocity can be resolved by transmitting multiple bursts of pulses
- with constant PRF
- with different PRFs
- with two PRFs
- none
Answer: with different PRFs
15. Unambiguous range measurements and ambiguous velocity measurements are caused by
- low PRF
- high PRFs
- medium PRFs
- high PRF
Answer: low PRF
16. Ambiguous range measurements and ambiguous velocity measurements are caused by
- low PRF
- high PRFs
- medium PRFs
- high PRF
Answer: medium PRFs
17. Very ambiguous range measurements and unambiguous velocity measurements are caused by
- low PRF
- high PRFs
- medium PRFs
- high PRF
Answer: high PRF
18. Staggering or changing the time between pulses will
- raise the blind speed
- lower the blind speed
- maintain the same blind speed
- none
Answer: raise the blind speed
19. The following radar does not provide the target velocity estimation:
- Pulse Doppler Radar
- MTI
- both
- none
Answer: MTI
20. The blind speed of an MTI radar can be avoided by
- changing the carrier frequency
- changing the carrier frequency
- changing the carrier frequency
- changing the carrier frequency
Answer: pulse repetition frequency
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