Explore topic-wise MCQs in Wireless & Mobile Communications Questions & Answers Linear Modulation Techniques.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Wireless & Mobile Communications Questions & Answers Linear Modulation Techniques knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following is not a detection technique used for detection of /4 QPSK signals?

A. Baseband differential detection
B. IF differential detection
C. FM discriminator detection
D. Envelope detection
Answer» E.
Discussion
2.

QPSK provides twice the bandwidth efficiency and _______ energy efficiency as compared to BPSK.

A. Twice
B. Half
C. Same
D. Four times
Answer» D. Four times
Discussion
3.

QPSK has ________ the bandwidth efficiency of BPSK.

A. Twice
B. Same
C. Half
D. Four times
Answer» B. Same
Discussion
4.

The energy efficiency of DPSK is _________ to coherent PSK.

A. Superior
B. Same
C. Zero
D. Inferior
Answer» E.
Discussion
5.

In DPSK system, input signal is differentially encoded and then modulated using a ________ modulator.

A. Amplitude
B. Frequency
C. BPSK
D. QPSK
Answer» D. QPSK
Discussion
6.

By applying cos(2 ft), BPSK signal is equivalent to ________

A. Double sideband suppressed carrier amplitude modulated waveform
B. Single sideband suppressed carrier amplitude modulated waveform
C. Frequency modulated waveform
D. SSB amplitude waveform
Answer» B. Single sideband suppressed carrier amplitude modulated waveform
Discussion
7.

In BPSK, the ________ of constant amplitude carrier signal is switched between two values according to the two possible values.

A. Amplitude
B. Phase
C. Frequency
D. Angle
Answer» C. Frequency
Discussion
8.

In linear modulation technique __________ of transmitted signal varies linearly with modulating digital signal.

A. Amplitude
B. Frequency
C. Phase
D. Angle
Answer» B. Frequency
Discussion