Date-wise lesson Plan for Communication Engineering
Day
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Topic
Fourier series and transform, its properties and some problems based on
FS & FT.
Analog communication block diagram, Need for modulation, Amplitude
modulation, waveforms,
AM spectrum and power calculations, Total modulation index, Spectrum
Efficiency.
AM modulators: Square law modulator and switching modulator
(Diagram and mathematical derivation)
AM demodulator: Square law demodulator, Envelope detector, diagonal
clipping and condition to avoid diagonal clipping.
Problems based on AM equation, waveform, spectrum and power
calculation of AM.
DSBSC concept, waveform spectrum and power calculation.
DSBSC modulator: Balance modulator (Block diagram, explanation with
mathematical justification and wave form), ring modulator (Block
diagram, explanation with mathematical justification and wave form),
DSBSC demodulator: Synchronous or coherent detector, carrier
reinsertion method.
Errors in synchronous detection: phase error and frequency error
mathematical analysis.
Problems based on DSBSC (Spectrum analysis and detection error)
Assignment-1
SSBSC concept, Hilbert transform, SSBSC mathematical derivation and
spectrum analysis.
SSBSC modulator: SSBSC Generation by Phase discrimination method
and frequency discrimination method, its concept, mathematical analysis
and spectrum analysis.
SSBSC demodulator: synchronous detection and large carrier detection.
FDM and Problems on SSBSC.
VSB concept and only the mathematical representation of VSBSC
modulated wave.
VSM modulator: Phase and frequency discriminator method for VSB
generation
VSB demodulation: synchronous detection, large carrier insertion
detection method.
Super heterodyne AM receiver, image frequency and
Problems based on image frequency.
Doubt clearing and sample problem.
Frequency modulation and phase modulation concept and waveform.
Generation of FM wave by using phase modulator + integrator circuit.
Generation of PM wave using frequency modulator and differentiator
circuit.
Derivation for NBFM, spectrum, Generation by using phase
discrimination method
WBFM derivation, spectrum. Carson’s Rule.
Problems on FM. Assignment-2
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50
Direct FM generation: Parameter variation method and Varactor diode
method
Indirect FM generation: Armstrong method, Problems based on that
method.
FM demodulation: direct differentiation method, PLL concept only
Pre-emphasis and de-emphasis circuit concept block diagram
FM super-heterodyne receiver.
Problem based on FM like bandwidth using Carson’s law, frequency
deviation etc.
Doubt clearing class and Quiz-1 (Solution discussion)
Sampling theorem, types of sampling and problems based on that
Pulse amplitude modulation concept, waveform and its generation method
PWM and PPM concept, waveform and method of generation
PCM system and SNR in PCM system
Time division multiplexing concept
Problems based on pulse modulation and SNR
Doubt clearing class and Problems
Digital communication block diagram, BASK, BPSK and BFSK concept
and waveform
BASK modulator, demodulator and Signal space representation
BPSK modulator, demodulator and Signal space representation
BFSK modulator, demodulator and Signal space representation
QPSK concept, modulator and waveform
QPSK demodulator Quiz-2, Assignment 3
Optical communication system block diagram, concept of step index,
graded indexed fiber with its advantages and disadvantages, brief idea
about LASER and LED (optical sources)
Advantages of optical fiber over coaxial cables. Problems based on
Snell’s law, Numerical aperture etc.
Kepler’s law, satellite communication system, why uplink frequency is
chosen higher than downlink frequency.
block diagram and concept of uplink section, downlink section and
transponder
Mobile communication system block diagram and concept of cell,
frequency reuse.
Modem and Doubt clearing class, Assignment 4