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In slow fading channel, Doppler spread of the channel is much less than the ________ of baseband signal.

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In slow fading channel, Doppler spread of the channel is much less than the ________ of baseband signal.

(a) Symbol period

(b) Phase

(c) Coherence time

(d) Bandwidth

The question was asked in a national level competition.

This interesting question is from Types of Small- Scale Fading topic in division Mobile Radio Propagation: Small – Scale Fading and Multipath of Wireless/Mobile

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Best answer
Right choice is (d) Bandwidth

The best explanation: Slow fading channel may be assumed to be static over one or several reciprocal bandwidth intervals. In the frequency domain, this implies that the Doppler spread of the channel is much less than the bandwidth of the baseband signals.

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