Question

Which among the following techniques were employed for the identification of pairs in LORAN stations?

a.

Modulation technique

b.

Encoding scheme

c.

Phase comparison between signals

d.

Pulse repetition frequency

Posted under Cognitive Radio

Answer: (d).Pulse repetition frequency Explanation:LORAN stations are composed of a master station and two slave stations. Each pair typically broadcasted over the following frequencies of 1.75, 1.8, 1.85, or 1.9 MHz. However, the location of stations is such that it allowed a particular station to pick up signals from at least three stations. Thus to detect to pairs of signals, pulse repetition frequency comparison is employed.

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Q. Which among the following techniques were employed for the identification of pairs in LORAN stations?

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