Semester 4

COURSE OBJECTIVE

• To study the various types of communication techniques and their analysis based on Fourier transform and to provide fundamental knowledge of pulse modulation techniques and their types.

UNIT 1 SIGNAL ANALYSIS 

Fourier transform of gate functions, delta functions at the origin – Two delta function and periodic delta function – properties of Fourier transform – Frequency shifting – Time shifting – Convolution theorem – Frequency convolution theorem – Sampling theorem.

UNIT 2 PULSE MODULATION AND COMMUNICATION 

Pulse amplitude modulation – Natural sampling -Instantaneous sampling Transmission of PAM signals – Pulse width modulation – Time division multiplexing and frequency division multiplexing – Band width requirements for PAM signals – Pulse code modulation – Principles of PCU – Quantizing noise – Generation and demodulation of PCM – Effects of noise – Advantages and application of PCM – Differential PCM (DPCM) – Delta modulation.

UNIT 3 BROAD BAND COMMUNICATION 

Coaxial cable circuit -Parallel wire line circuit – Computer communication – Digital data communication – Modems – Microwave communication links – LOS links – Tropospheric scatter microwave links – Integrated Service Digital Network (ISDN) – Architecture – Broadband ISDN – Local Area Network (LAN) – LAN topologies – Private Branch Exchange (PBX).

UNIT 4 SATELLITE COMMUNICATION

Introduction – Communication satellite systems – Transmitting and receiving earth station – Satellite orbits – Satellite frequency bands – Satellite multiple access formats – FDMA – CDMA – Satellite channel, Power flow – Polarization antenna gain – Parabolic dish antenna – Power loss – Rainfall effect – Receiver noise –satellite system power budget: EIRP, received power Carrier to noise ratio, G/T ratio. – Satellite link analysis – Up link – Down link – Cross link – Direct Home TV broadcasting – Satellite transponders.

UNIT 5 RADAR SYSTEMS AND OPTICAL FIBER 

Introduction, Basic Radar systems, Radar systems – Radar range – Pulsed radar system – A Scope – Plan Position Indicator (PPI) – Search Radar – Tracking Radar – Moving Target Indicator (MTI) – Doppler Effect – MTI principle – Digital MTI – Radar Beacons. Optical Fiber: Introduction to light, optical fiber and fiber cables, optical fiber characteristics and classification, losses, Fiber optic components and systems, Installation, testing and repair.

Course Outcomes:

By the end of this course students will be able to

CO1: Design, operation, and troubleshoot of electronic systems

CO2: Solve electronic devices and systems using mathematical concepts.

CO3: Analyze electronics devices and circuits using computer simulations.

CO4: Analyze components associated with digital and analog electronic/communication systems.

CO5: Analyze basic wireless and communication circuits using computer simulations