Digital Communications Modulation Techniques Online Exam Quiz
Digital Communications Modulation Techniques GK Quiz. Question and Answers related to Digital Communications Modulation Techniques. MCQ (Multiple Choice Questions with answers about Digital Communications Modulation Techniques
Which is called as on-off keying?
Options
A : Amplitude shift keying
B : Uni-polar PAM
C : Amplitude shift keying & Uni-polar PAM
D : None of the mentioned
Average energy per bit is given by
Options
A : average energy symbol/log2 M
B : average energy symbol * log2 M
C : log2 M/ Average energy symbol
D : none of the mentioned
Simulation is used to determine
Options
A : Bit error rate
B : Symbol error rate
C : Bit error
D : Symbol error
Which has same probability of error?
Options
A : BPSK and QPSK
B : BPSK and ASK
C : BPSK and PAM
D : BPSK and QAM
Which FSK has no phase discontinuity?
Options
A : Continuous FSK
B : Discrete FSK
C : Uniform FSK
D : None of the mentioned
FSK reception uses
Options
A : Correlation receiver
B : PLL
C : Correlation receiver & PLL
D : None of the mentioned
Which system uses QAM?
Options
A : Digital microwave relay
B : Dial up modem
C : Digital microwave relay & Dial up modem
D : None of the mentioned
QAM uses ______ as the dimensions.
Options
A : In phase
B : Quadrature
C : In phase & Quadrature
D : None of the mentioned
If we correlate the received signal with both orthogonal function the inner product will be
Options
A : In phase
B : Quadrature
C : In phase and quadrature
D : Unity
If we correlate the received signal with any one of the two orthogonal function, the obtained inner product will be
Options
A : In phase
B : Quadrature
C : Zero
D : Cannot be determined
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