Analog and Digital Communication — Winter 2023

What is single sideband suppressed carrier modulation?

Explain the need for modulation in communication systems.

Derive mathematical representation of Amplitude Modulation and explain the signification of Modulation Index with necessary waveforms

What are the salient features of broadcast radio receivers?

Draw the superheterodyne receiver and explain the operation of working.

What is a noise figure? Derive the expression of noise figure for cascaded stages of amplifiers.

Explain the classification of the noise and drive the expression for noise voltage.

What do you mean by the probability of error for digital modulation signals?

Explain the ASK modulation technique with suitable waveforms.

Explain the PCM modulation technique and also mention the significance of quantization.

Explain the FSK modulation technique with suitable waveforms.

Draw FSK and PSK waveform for the given binary data: 1001001101011001.

What is delta modulation? Explain the generation method with suitable diagrams and waveforms.

What is the difference between Coherent and Non-Coherent Detection techniques

What is coherent demodulation of binary ASK?

What is an AM transmitter? Draw the block diagram of the AM transmitter and explain each block.

What is the bandwidth of the QPSK signal?

Explain the non-coherent FSK detection technique.

What is an FM receiver? Draw the block TRF receiver and explain each block1

Explain the importance of Pre-emphasis and De-emphasis circuits in FM. Sketch a typical Pre-emphasis and De-emphasis circuit

Explain CDMA in detail.

For the FM System, the modulating frequency is 4 KHz and the maximum frequency deviation is 20 KHz. Calculate modulation index β and bandwidth of the system using Carson’s Rule.

Give a comparison of the Wideband and the Narrowband FM.

Draw a Block diagram of frequency hopping spread spectrum (FHSS) system and Explain Frequency Hopping with necessary waveforms

Explain Armstrong's method of FM generation with a neat diagram.2