Subject Details
Dept     : ECE
Sem      : 4
Regul    : 2013
Faculty : P.Ramya
phone  : NIL
E-mail  : ramya.ece.snsce@gmail.com
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Lecture Notes

UNIT 1:
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SSB Generation – Filter, Phase Shift and Third Methods
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VSB Generation – Filter Method, Hilbert Transform, Pre-envelope & complex envelope
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Superheterodyne Receiver
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comparison of different AM techniques
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AM Generation – Square law and Switching modulator
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SSB Generation – Filter, Phase Shift and Third Methods
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Amplitude Modulation- DSBSC, DSBFC
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Spectra, Power relations and Bandwidth
UNIT 2:
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Introduction
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Phase and frequency modulation
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Narrow Band and Wide band FM
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Modulation index
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Spectra, Power relations and Transmission Bandwidth
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FM modulation –Direct and Indirect methods
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FM Demodulation – FM to AM conversion
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FM Discriminator
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PLL as FM Demodulator
UNIT 3:
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Introduction
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Random variables
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Random Process
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Stationary Processes
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Mean, Correlation & Covariance functions
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Power Spectral Density
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Stationary Processes
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Gaussian Process
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Transmission of a Random Process Through a LTI filter
UNIT 4:
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Noise sources – Noise figure
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In-phase and quadrature
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noise temperature and noise bandwidth
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Noise in cascaded systems
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Noise sources – Noise figure
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Envelope and Phase
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Pre-emphasis and de- emphasis for FM
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Noise performance analysis in AM & FM systems
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Threshold effect
UNIT 5:
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Quantization
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Uniform & non-uniform quantization
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TDM, FDM
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Signal Reconstruction
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Low pass sampling
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Aliasing
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Logarithmic Companding
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PAM, PPM, PWM, PCM
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quantization noise