Question 1 : The width of each channel in frequency hopping spread spectrum corresponds to
1. Bandwidth of input signal
2. Pseudorandom sequence used
3. Carrier frequency
4. None of the mentioned
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Question 2 : Which type of channel does the forward link contain?
1. Paging
2. Pilot
3. Traffic
4. All of the mentioned
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Question 3 : In Vigenere method ______ is provided.
1. Priming key
2. Feedback
3. Priming key & Feedback
4. None of the mentioned
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Question 4 : Which are the design options for anti jam communicator?
1. Time diversity
2. Frequency diversity
3. Special discrimination
4. All of the mentioned
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Question 5 : For direct sequence systems what is the minimum required processing gain?
1. 3db
2. 10db
3. 12db
4. 20db
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Question 6 : The _____ the uncertainty, the ______ is the information content.
1. Lesser, greater
2. Greater, lesser
3. Lesser, lesser
4. Greater, greater
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Question 7 : Direct system allows detection of signals whose psd level is
1. Below noise level
2. Above noise level
3. All of the mentioned
4. None of the mentioned
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Question 8 : For any cyclic shift, the auto-correlation function is equal to
1. 1/p
2. -1/p
3. -p
4. p
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Question 9 : Acquisition can be accomplished ________ as all possible codes are examined ______
1. Slowly, one by one
2. Rapidly, simultaneously
3. Slowly, simultaneously
4. Rapidly, one by one
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Question 10 : In auto key method
1. Feedback is necessary
2. Feedback is not necessary
3. Can be either necessary or not
4. None of the mentioned
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