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Frequency division duplexing provides ________ distinct bands of frequencies for _________ user.

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Frequency division duplexing provides ________ distinct bands of frequencies for _________ user.

(a) Two, two

(b) One, two

(c) Two, one

(d) Two, many

The question was asked during an interview for a job.

Enquiry is from Introduction to Multiple Access topic in division Multiple Access Techniques for Wireless Communications of Wireless/Mobile

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Right option is (c) Two, one

Easiest explanation: Frequency division duplexing (FDD) provides two distinct bands of frequencies for every user. In FDD, any duplex channel actually consists of two simplex channels.

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