Exam Details
| Subject | Analog Communication | |
| Paper | ||
| Exam / Course | BTCVI / BTECVI / BTELVI | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
Find the time autocorrelation function of the signal
List the properties of Gaussian process.
List the properties of autocorrelation function.
Determine the autocorrelation of white Gaussian noise having zero mean and power spectral density of N0/2 when passed through an ideal band-pass filter of pass-band magnitude response equal to one, mid-band frequency fc and bandwidth 2B.
Compare DSB-8C, SSB and VSB modulation schemes.
What are the virtues and limitations of amplitude modulation?
Why is quadrature carrier multiplexing scheme called a bandwidth conservation scheme Illustrate with the help. of suitable block diagram of transmitter and receiver of the quadrature carrier multiplexing system.
Generate
FM wave by using phase modulator, and
PM wave by using frequency modulator.
A single tone modulating signal; cos (15n frequency modulates a carrier of 10 MHz and produces a frequency deviation of 75 kHz. Find
Modulation index,
Phase deviation produced in the FM wave.
With the help of appropriate block diagram, generate a wideband FM signal using indirect method.
The maximum deviation allowed in an FM broadcast system is 75 kHz. If the modulating signal is a single tone sinusoid of 10 kHz, find the bandwidth of the FM signal. What will be the change in the bandwidth, if modulating frequency is doubled? Determine bandwidth when the modulating signal's amplitude is also doubled.
Justify how Ratio detector is better than Foster-Seeley discriminator for FM demodulation.
Calculate or show that the figure of merit in case of FM receivers is given by the following expression:
FOM 3kf^2
where kf Frequency sensitivity constant
P Message signal power
W Bandwidth of message signal
What is meant by 'Capture Effect' in FM system?
What is meant by Pre-emphasis and De-emphasis in FM
Discuss how 'phase locked loop may be used to demodulate FM signal.
Prove that a narrow band FM signal requires essentially the same transmission bandwidth as that of an AM signal.
Explain square law modulation for AM generation.
10. Write short notes on any two of the following:
Weaver's Method for SSB Generation
FM Stereo Multiplexing
Threshold Effect in Envelope Detector
List the properties of Gaussian process.
List the properties of autocorrelation function.
Determine the autocorrelation of white Gaussian noise having zero mean and power spectral density of N0/2 when passed through an ideal band-pass filter of pass-band magnitude response equal to one, mid-band frequency fc and bandwidth 2B.
Compare DSB-8C, SSB and VSB modulation schemes.
What are the virtues and limitations of amplitude modulation?
Why is quadrature carrier multiplexing scheme called a bandwidth conservation scheme Illustrate with the help. of suitable block diagram of transmitter and receiver of the quadrature carrier multiplexing system.
Generate
FM wave by using phase modulator, and
PM wave by using frequency modulator.
A single tone modulating signal; cos (15n frequency modulates a carrier of 10 MHz and produces a frequency deviation of 75 kHz. Find
Modulation index,
Phase deviation produced in the FM wave.
With the help of appropriate block diagram, generate a wideband FM signal using indirect method.
The maximum deviation allowed in an FM broadcast system is 75 kHz. If the modulating signal is a single tone sinusoid of 10 kHz, find the bandwidth of the FM signal. What will be the change in the bandwidth, if modulating frequency is doubled? Determine bandwidth when the modulating signal's amplitude is also doubled.
Justify how Ratio detector is better than Foster-Seeley discriminator for FM demodulation.
Calculate or show that the figure of merit in case of FM receivers is given by the following expression:
FOM 3kf^2
where kf Frequency sensitivity constant
P Message signal power
W Bandwidth of message signal
What is meant by 'Capture Effect' in FM system?
What is meant by Pre-emphasis and De-emphasis in FM
Discuss how 'phase locked loop may be used to demodulate FM signal.
Prove that a narrow band FM signal requires essentially the same transmission bandwidth as that of an AM signal.
Explain square law modulation for AM generation.
10. Write short notes on any two of the following:
Weaver's Method for SSB Generation
FM Stereo Multiplexing
Threshold Effect in Envelope Detector
Other Question Papers
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Subjects
- Advance Microprocessor And Architecture
- Analog and Mixed Mode VLSI Design
- Analog Communication
- Analog Electronic Circuits
- Analog Integrated Circuits Design
- Antennas and Propagation
- B10-Informatics
- Basics Of Electronics Engineering
- Computer Architecture
- Computer Communication Networks
- Control Engineering
- Data Communication And Network
- Device Modelling For Circuit Simulation
- Digital Electronics
- Digital Signal Processing
- Digital System Design
- Electromagnetic Field Theory
- Electronic Measurement and Inst
- Electronic Switching Circuits
- Embedded System Design
- Information Theory And Coding
- Linear Integrated Circuits
- Microcontrollers
- Microprocessor And Its Applications
- Microwave And Radar Engineering
- Multirate Systems
- Optical Fiber Communication
- Power Electronics
- Satellite And Tv Engineering
- Signal And Systems
- Wireless Communication