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In which technique spot beam antennas are used to point the radio signals in different directions?

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In which technique spot beam antennas are used to point the radio signals in different directions?

(a) Code division

(b) Space division

(c) Frequency division

(d) None of the mentioned

This question was addressed to me in an interview for job.

I'm obligated to ask this question of Evaluating Digital Communication System and Allocation of Communication Resources in chapter Modulation and Coding Trade-off of Digital Communications

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The correct answer is (b) Space division

To explain: In space division multiplexing, spot beam antennas are used to separate radio signals by pointing in different directions.

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