Question 21 : Which type of demodulator is used in the frequency hopping technique?
1. Coherent
2. Non coherent
3. Coherent & Non coherent
4. None of the mentioned
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Question 22 : The ratio (J/S)reqd gives the measure of
1. Vulnerability to interference
2. Invulnerability to interference
3. All of the mentioned
4. None of the mentioned
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Question 23 : Which serves the soft hand-off process?
1. Base station
2. Mobile switching center
3. Mobile
4. None of the mentioned
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Question 24 : The maximum number of message bits contained in each character is called as
1. True rate
2. Absolute rate
3. Optimum rate
4. None of the mentioned
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Question 25 : DS/BPSK includes
1. Despreading
2. Demodulation
3. Despreading & Demodulation
4. None of the mentioned
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Question 26 : If the active users using a cell doubles, the required Eb/I0
1. Doubles
2. Halves
3. Remains the same
4. None of the mentioned
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Question 27 : In CDMA, the users share the bandwidth
1. Synchronously
2. Asynchronously
3. Synchronously & Asynchronously
4. None of the mentioned
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Question 28 : Which duration is shorter?
1. Hop duration
2. Symbol duration
3. Chip duration
4. None of the mentioned
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Question 29 : Walsh cover technique is used for
1. Channelization
2. Spreading
3. Channelization & Spreading
4. None of the mentioned
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Question 30 : Short code is configured using ______ shift register.
1. 4-stage
2. 2-stage
3. 12-stage
4. 15-stage
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