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What type of signal is employed by LORAN?

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What type of signal is employed by LORAN?

(a) Intermittent

(b) Continous

(c) Burst

(d) Buffer

This question was addressed to me in homework.

The origin of the question is Next Generation Wireless Network topic in chapter Next Generation Wireless Network of Cognitive Radio

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Best answer
Right option is (c) Burst

For explanation: LORAN system sends a known burst signal with fixed periodicity from multiple transmitters. The receivers construct time difference of arrival hyperboloid curve to determine the location of the transmitter. LORAN provides published charts corresponding to hyperboloid curves, to find the intersection of two-time difference pairs.

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