Question 31 : The original bandwidth of the unspread signal in spread spectrum is ____ to data rate.
1. Proportional
2. Inversely proportional
3. Not related
4. None of the mentioned
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Question 32 : The key also contains a
1. Plaintext
2. Ciphertext
3. Plaintext & Ciphertext
4. None of the mentioned
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Question 33 : Matched filter does ______ search.
1. Serial
2. Parallel
3. Serial & Parallel
4. None of the mentioned
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Question 34 : In the case of direct CDMA, interference will occur if the PN codes are
1. Orthogonal to each other
2. Non orthogonal to each other
3. Orthogonal & Non orthogonal to each other
4. None of the mentioned
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Question 35 : Frequency hopping system can provide reliable mitigation only if
1. Hopping rate is greater than the symbol rate
2. Hopping bandwidth is large
3. Hopping rate is greater than the symbol rate & its bandwidth is large
4. None of the mentioned
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Question 36 : The processing gain is given as
1. Wss/R
2. R/Wss
3. Wss/2R
4. R/2Wss
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Question 37 : Which modulation scheme is preferred for direct sequence spread spectrum process?
1. BPSK
2. QPSK
3. BPSK & QPSK
4. None of the mentioned
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Question 38 : In direct sequence process which step is performed first?
1. De-spreading
2. Demodulation
3. Despreading & Demodulation
4. None of the mentioned
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Question 39 : Acquisition uses ______ likelihood algorithm for acquiring the code.
1. Minimum
2. Maximum
3. Minimum & Maximum
4. None of the mentioned
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Question 40 : In CDMA ______ frequency reuse is possible.
1. No
2. 50%
3. 90%
4. 100%
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