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__________ is undesired RF radiation.

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__________ is undesired RF radiation.

(a) Intermodulation frequency

(b) Intermediate frequency

(c) Instantaneous frequency

(d) Instrumental frequency

The question was posed to me in semester exam.

This interesting question is from Frequency Division Multiple Access (FDMA) topic in portion Multiple Access Techniques for Wireless Communications of Wireless/Mobile

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The correct answer is (a) Intermodulation frequency

Best explanation: Intermodulation (IM) frequency is undesired RF radiation which can interfere with other channels in the FDMA systems. The nonlinearities cause signal spreading in the frequency domain and generate IM frequency.

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