Skip to content
Padhora
Sign in
BrowsePlans

DI03000121 · Semester 3 · 5G scheme

Principle of Electronics Communication

Notes and solutions following the Gujarat Technological University (GTU) syllabus for DI03000121. Independent material — not issued by the university.

Electronics & Communication EngineeringInformation & Communication Technology

Materials

Syllabus

The official syllabus this material follows.

  • Syllabus

    7 pages

    FreeRead

Complete Book

The whole syllabus, unit by unit, written for the exam.

Problem Solver

Step-by-step solutions to typical problems.

Slides

Lecture slides for revision.

Past Papers

Original question papers from previous exams.

  • Summer 2026 question paper

    3 pages

    FreeRead

  • Winter 2025 question paper

    3 pages

    FreeRead

PYQ Solutions

Past university papers, fully solved.

  • Solved past papers — detailed answers

    51 pages · English + ગુજરાતી

    Premium Preview · 7 pages

Assignments & Tests

Assignments and unit tests to practise with.

Syllabus units

Unit 1: Basics of Communication System
  • Electromagnetic (EM) wave spectrum, frequency bands and their applications domain
  • Signals and its representation: analog and digital Signal, Pulse, Impulse, Saw-tooth, sinusoidal and rectangular (In Time & frequency domain)
  • Block diagram of Analog and Digital communication system
  • Modulation: Definition & its classification based on analog & pulse signal as carrier
  • Noise in communication system, classification of noise, signal to noise ratio(S/N) and noise figure
Unit 2: Amplitude Modulation (AM) Communication
  • Need of modulation
  • Types of modulation techniques, Amplitude Modulation: Modulating signal, Carrier signal, modulation Index, mathematical representation of AM Signal, representation in time and frequency domain, Frequency Spectrum, Types of AM band spectrum (DSB, SSB) and their applications, Power relations in AM wave, bandwidth, Power saving in SSB
  • Generation of AM: DSBSC signal using balanced modulator circuit
  • Demodulation of AM signal: Envelope detector using diode
  • Block diagram and working of each block of super heterodyne receiver with waveforms Characteristics Selectivity, Sensitivity, Image frequency rejection and Fidelity
Unit 3: Frequency Modulation (FM) Communication
  • Frequency modulation: Mathematical representation of FM signal Use of Bessel's function (no derivation), representation of FM signal in time domain and frequency domain, frequency deviation ratio, modulation index (numerical), types of frequency modulation (Narrow Band and Wide Band FM)
  • Phase Modulation: definition, waveforms and applications
  • Pre-emphasis and De-emphasis
  • Generation techniques for FM wave: Phase locked loop FM modulator
  • Basics and types of FM demodulators: Ratio detector and PLL as FM demodulator
  • FM Receiver: Block diagram and working with waveforms
  • Compare AM, FM and PM
Unit 4: Sampling theory and waveform coding
  • Statement and proof of sampling theorem
  • Nyquist rate and interval
  • Aliasing error, under sampling, over sampling and critical sampling
  • Ideal, Natural and flat top sampling
  • Pulse Modulation techniques: PAM, PWM, PPM
  • Concept of Quantization
  • Classification of quantization
  • PCM transmitter and receiver
Unit 5: Electromagnetic Wave and antenna
  • Properties of EM (electromagnetic) wave
  • Antenna fundamentals: Resonant antenna and Nonresonant antennas, ideal antenna, principle of transmitting and receiving antenna
  • Antenna parameters: Radiation pattern, polarization, bandwidth, beam width, antenna resistance, directivity and power gain, antenna gain
  • Dipole antenna and radiation pattern and Radiation Pattern for Unidirectional, bidirectional and Omni directional antenna
  • Antenna (working principle, construction, radiation pattern and applications): Loop antenna, folded dipole, Yagi-Uda antenna and smart antenna

About this course

Students of diploma Electronics and Communication Engineering need to have a thorough understanding of fundamental concepts of Communication Engineering. Diploma students undertaking this course are expected to apply the fundamentals of basic electronic communication system to analyze the different communication (Modulation and Demodulation) methods with its techniques, various antenna for specific application this basic course develop skills required to learn communication to meet the expectations of the industry.