Question 41 : Which is more effective and commonly preferred technique?
1. Time diversity
2. Spatial diversity
3. Frequency diversity
4. None of the mentioned
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Question 42 : Channel's time spreading properties are
1. Coherence bandwidth
2. Signal dispersion
3. Coherence bandwidth & Signal dispersion
4. None of the mentioned
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Question 43 : Small scale fading occurs due to
1. Doppler shift
2. Time delay
3. Doppler shift & Time delay
4. None of the mentioned
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Question 44 : Flat fading can be avoided or stopped by
1. Error coding
2. Equalization
3. Adaptive bit loading
4. All of the mentioned
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Question 45 : Which needs more signal power?
1. BPSK
2. 16-QAM
3. BPSK & 16-QAM
4. None of the mentioned
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Question 46 : How can slow fading be minimized?
1. By diversity technique
2. Error correcting codes
3. By diversity technique & Error correcting codes
4. None of the mentioned
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Question 47 : Rake receiver does
1. Counter effects multi-path fading
2. Resembles equalizer
3. Resembles equalizer & Counter effects multi-path fading
4. None of the mentioned
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Question 48 : The effect of Doppler shift can be counterattacked by
1. OFDM
2. By using two receivers with separate antennas
3. By using diversity receiver
4. All of the mentioned
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Question 49 : If delay time is lesser than symbol time, ______ fading occurs.
1. Frequency non selective
2. Flat
3. Frequency non selective & Flat
4. None of the mentioned
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Question 50 : Channel noise is
1. Additive
2. White and stationary
3. Has infinite bandwidth
4. All of the mentioned
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