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____ separates uplink and downlink.

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____ separates uplink and downlink.

(a) Frequency Division Duplexing

(b) Time Division Duplexing

(c) Frequency Division Multiplexing

(d) Time Division Multiplexing

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This intriguing question originated from RF and IF Processing Tradeoffs topic in division Technology Tradeoffs in Software Defined Radio of Cognitive Radio

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The correct option is (a) Frequency Division Duplexing

Easy explanation: Frequency Division Duplexing separates uplink and downlink to minimize interference. SDR operating on TDD can create dynamic FDD nets by a protocol that dynamically defines uplink, downlink and frequency separation.

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