Analog Communication

Unit-I Different types of Signals

Different types of Signals
Fourier Transform
Fourier Transform Properties
Transform of Gate Signal
Impulse Function and Unit Step Function,
Fourier Transform Technique for Periodic Signal
Spectral Density of various types of signals
Spectra (Parseval’s Theorem)

Unit-II Modulation Techniques

Need and types of modulation techniques
Amplitude Modulation
Frequency Modulation
Modulation by Complex Signal
Low Level and High Level AM Modulators
Analog Modulation
Suppressed Carrier Generation
VSB Transmission and Application

Unit-III Angle Modulation

Frequency and Phase Modulation Frequency spectrum
NBFM and WBFM
Multiple frequencies FM
FM Modulators
FM Detector
Ratio Detector and PLL detectors

Unit-IV Radio Transmitters

AM transmitter
Trapezoidal Pattern and Carrier Shift
SSB Transmitters
FM transmitters
Block Diagram of Radio Receiver
AM Receiver
RF Receiver
Super-heterodyne Receiver
RF Amplifier
AVC and AFC

Unit-V Noise

Sources and types of noise and their power density
White Noise
Noise from Single and Multiple noise source for Linear Systems
Calculation of Noise Figure and Noise Temperature for Cascade Systems
Noise Performance of Communication System