Frequency-modulated radars transmit a wave that continuously changes in frequency about a center frequency.
Using frequency modulation, the range to a target is determined by using which of the following methods?
A. By comparing the frequency of the transmitted signal with the returned frequency from the target
B. By comparing the magnitude of transmitted pulses with the magnitude of returned pulses
C. By comparing the velocity of the received energy with the velocity of the transmitted energy
D. By measuring the Doppler shift that occurs in the returning signal
Show Answer
Answer: A
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