1) Direct RF pulse system helps in calculating
a. Impulse response in frequency domain
b. Impulse response in phase domain
c. Power delay of the channel
d. All of the above
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Answer
Explanation
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ANSWER: Power delay of the channel
Explanation:
No explanation is available for this question!
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2) The techniques used for small scale multipath measurements are
1. Direct RF pulse system
2. Spread spectrum sliding correlator channel sounding
3. Frequency domain channel sounding
a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All the three are correct
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Answer
Explanation
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ANSWER: All the three are correct
Explanation:
No explanation is available for this question!
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3) The received signal from a multipath channel is expressed as
a. Convolution of transmitted signal and impulse response
b. Addition of transmitted signal and impulse response
c. Subtraction of transmitted signal and impulse response
d. All of the above
e. None of the above
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Answer
Explanation
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ANSWER: Convolution of transmitted signal and impulse response
Explanation:
No explanation is available for this question!
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4) Impulse response of a multipath channel is determined by the fact that
a. Mobile radio channel may be modeled as linear filter
b. Impulse response is time varying
c. Both a & b
d. None of the above
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Answer
Explanation
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ANSWER: Both a & b
Explanation:
No explanation is available for this question!
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5) The effects of small scale multipath propagation are
1. Changes in signal strength
2. Random frequency modulation
3. Time dispersion
a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All the three are correct
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Answer
Explanation
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ANSWER: All the three are correct
Explanation:
No explanation is available for this question!
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6) Small scale multipath propagation is caused due to waves with
1. Different propagation delays
2. Different amplitudes
3. Different phase
a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All the three are correct
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Answer
Explanation
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ANSWER: All the three are correct
Explanation:
No explanation is available for this question!
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7) Coherence bandwidth is
a. Channel that passes all spectral components with equal gain
b. The bandwidth of modulated signal
c. Channel that passes all spectral components with linear phase
d. Both a and c
e. Both a and b
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Answer
Explanation
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ANSWER: Both a and c
Explanation:
No explanation is available for this question!
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8) The power delay profile helps in determining
a. Excess delay
b. rms delay spread
c. Excess delay spread
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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9) If coherence time of the channel is smaller than the symbol period of the transmitted signal, it is
a. Fast fading
b. Slow fading
c. Frequency selective fading
d. Frequency non selective fading
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Answer
Explanation
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ANSWER: Fast fading
Explanation:
No explanation is available for this question!
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10) In Frequency Selective Fading, the
a. Coherence Bandwidth of the channel is less than bandwidth of transmitted channel
b. Coherence Bandwidth of the channel is more than bandwidth of transmitted channel
c. Coherence Bandwidth of the channel is equal to bandwidth of transmitted channel
d. None of the above
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Answer
Explanation
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ANSWER: Coherence Bandwidth of the channel is less than bandwidth of transmitted channel
Explanation:
No explanation is available for this question!
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