Question 11 : Which is more vulnerable to noise?
1. 2-ary system
2. 4-ary system
3. Binary system
4. None of the mentioned
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Question 12 : The minimum tone separation corresponds to
1. T
2. 1/T
3. 2T
4. T/2
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Question 13 : The correlating detector is also known as
1. Maximum likelihood detector
2. Minimum likelihood detector
3. Maximum & Minimum likelihood detector
4. None of the mentioned
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Question 14 : Energy per symbol Es is given as
1. Es=Eb(log2M)
2. Es=Eb/(log2M)
3. Es=2Eb(log2M)
4. Es=Eb/2(log2M)
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Question 15 : In which system, bit stream is portioned into even and odd stream?
1. BPSK
2. MSK
3. QPSK
4. FSK
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Question 16 : The real part of a sinusoid carrier wave is called as
1. Inphase
2. Quadrature
3. Inphase & Quadrature
4. None of the mentioned
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Question 17 : Wavelength and antenna size are related as
1. λ/2
2. λ/4
3. 2λ
4. 4λ
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Question 18 : As limit of k increases, the ratio of PB/PE becomes
1. 1:2
2. 2:1
3. 1:3
4. 3:1
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Question 19 : Phase-locked loop circuitry is used for
1. Carrier wave recovery
2. Phase estimation
3. Carrier wave recovery & Phase estimation
4. None of the mentioned
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Question 20 : Matched filter is used for
1. Coherent detection
2. Non coherent detection
3. Coherent & Non coherent detection
4. None of the mentioned
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