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Which of the following is used in base station applications?

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Which of the following is used in base station applications?

(a) Super heterodyne receiver

(b) Direct conversion receiver

(c) Digital-RF receiver

(d) Homodyne receiver

The question was posed to me in an internship interview.

This key question is from RF and IF Processing Tradeoffs in section Technology Tradeoffs in Software Defined Radio of Cognitive Radio

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The correct choice is (a) Super heterodyne receiver

To explain: Super heterodyne receiver is used in base station applications. Direct conversion receiver is used in handsets. Digital-RF receiver performs demodulation at RF.

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