EC6402 COMMUNICATION THEORY SYLLABUS REGULATION
2013
UNIT I AMPLITUDE MODULATION
Generation and detection of AM
wave-spectra-DSBSC, Hilbert Transform, Pre-envelope & complex envelope -
SSB and VSB –comparison -Superheterodyne Receiver.
UNIT II ANGLE MODULATION
Phase and frequency Modulation-Narrow Band and
Wind band FM - Spectrum - FM modulation and demodulation – FM Discriminator-
PLL as FM Demodulator - Transmission bandwidth.
UNIT III RANDOM PROCESS
Random variables, Central limit Theorem, Random
Process, Stationary Processes, Mean, Correlation & Covariance functions,
Power Spectral Density, Ergodic Processes, Gaussian Process, Transmission of a
Random Process Through a LTI filter.
UNIT IV NOISE CHARACTERIZATION
Noise sources and types – Noise figure and
noise temperature – Noise in cascaded systems. Narrow band noise – PSD of
in-phase and quadrature noise –Noise performance in AM systems – Noise
performance in FM systems – Pre-emphasis and de-emphasis – Capture effect,
threshold effect.
UNIT V INFORMATION THEORY
Entropy - Discrete Memoryless channels -
Channel Capacity -Hartley - Shannon law - Source coding theorem - Huffman &
Shannon - Fano codes.
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