Syllabus Principles of Communication (Analog Communication) - (BE04000031) Total Credits Assessment Pattern and Marks Total Marks Theory Tutorial / Practical ESE(E) PA/CA (M) PA/CA (I) TW/SL (I) ESE (V) 4 70 30 20 30 50 200 Sr. No. Course Content 1. Introduction to communication systems : Communication system, Analog and digital Messages, Channel effect, Modulation and detection, Bandwidth of different information signals, Historical review of telecommunication, Applications. (Chapter - 1) 2. Analysis and transmission of signals : Aperiodic (non-periodic) signal representation by Fourier integral, Fourier transforms of some useful functions, signal transmission through a linear system, signal distortion over a communication channel, Signal energy and energy spectral density, signal power and power spectral density. (Chapter - 2) 3. Passive Circuits : Introduction, Series tuned circuits, Parallel tuned circuits, self-capacitance of a coil, Skin effect. (Chapter - 3) 4. Amplitude modulation(AM)/Demodulation : Concept of modulation, Mathematical representation of sinusoidal Amplitude modulated signals in time and frequency domain - Double sideband Full carrier (DSBFC), Double sideband suppressed carrier(DSBSC) and single sideband suppressed carrier modulations(SSBSC), Vestigial Sideband (VSB) modulation and Quadrature amplitude modulation(QAM), power and bandwidth calculations for DSBFC, DSBSC, SSBSC, VSB and QAM modulations, Non sinusoidal AM - effective modulation index, Effective voltage and current for sinusoidal and non-sinusoidal AM, AM generation : FET balanced modulator and IC balanced modulator circuits, Diode ring modulator, SSB generation : balanced modulator-filter method, phasing method and the third method, AM detection: peak (envelope detector), synchronous detectors, square law detectors. (Chapter - 4) 5. Angle modulation/demodulation : Concept of instantaneous frequency and angle modulation, sinusoidal FM and its time domain representation, spectral components of angle modulated signals, power in sinusoidal FM and modulation index, Carson’s rule, equivalence between Frequency modulation(FM) and Phase modulation(PM), Angle modulator circuits, FM transmitters, Armstrong method of FM generation, FM stereo broadcast, FM detection : Basic slope detector, Foster-Seeley discriminator, ratio detector, PLL detector and Quadrature detector, Concept of Amplitude limiter, Pre-emphasis and de-emphasis circuits, Interference in angle modulated systems. (Chapter - 5) 6. Radio receivers : Functions of radio receivers, working of super heterodyne radio receivers, tuning ranges, tracking, sensitivity and gain, image rejection, spurious responses, Adjacent channel selectivity, Automatic gain control, Electronically tuned, receivers, IC receivers, AM receivers, FM receivers. (Chapter - 6) 7. Noise : Introduction, thermal noise, Shot noise, Partition Noise, Low frequency noise, Burst noise, a noise, High frequency noise, BJT and FET noises, Equivalent input noise generators, Signal to noise ratio (SNR), SNR of Tandem connection, Noise factor and noise figure, Amplifier input noise in terms of noise figure, Noise factor in cascaded amplifiers, Noise factor and equivalent input noise generators, noise factor of a lossy network, Noise temperature, Measurement of noise temperature and noise factor, narrow-band band pass noise. Behavior of Analog systems in presence of Noise. (Chapter - 7) 8. Introduction of amateur radio technology : What is Ham radio ? How to become radio amateur ? Importance of Ham radio during natural calamities, Technology used in amateur radio. (Chapter - 8)
