(SEM IV) THEORY EXAMINATION 2021-22 COMMUNICATION ENGINEERING

SECTION A — Short Descriptive Explanation Needed

Section A contains basic questions on modulation, bandwidth, Carson’s rule, noise factor, TDM, Nyquist rate, BPSK, and FSK. Each answer should be a short paragraph explaining the meaning and role of the concept. This section tests your fundamental understanding of communication engineering principles.

Extra sample questions:
Explain amplitude modulation in a short paragraph.
Describe the meaning of coherent detection in simple words.
Explain the term "carrier signal" in 4–5 lines.

SECTION B — Medium Descriptive Paragraph Needed

Section B contains descriptive questions on AM modulation index, frequency modulation technique, PDF & CDF, delta modulation, granular noise, slope overload, ASK modulator/demodulator, etc. Answers must be written as one connected paragraph explaining the principle, expression, and purpose of the concept.

Extra sample questions:
Explain the working of FM generation in a descriptive paragraph.
Describe the concept of quantization noise in PCM.
Write a short descriptive explanation of ASK transmission.

SECTION C — Long Description Paragraph Needed

Section C has long explanatory questions on DSB-SC modulators, Fourier transform of pulses, phase modulation, NBFM, noise factor, sampling theorem, PCM system, QPSK, and MSK. Each answer should be a long, continuous paragraph explaining the full concept with diagrams or expressions.

Extra sample questions:
Explain QAM transmission in one detailed paragraph.
Describe the operation of FM transmitter and receiver.
Explain the concept of digital modulation with suitable examples.