Analog and Digital Communication | Study Unit
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Analog And Digital Communication

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Topics 9

Introduction to Communication Systems
This topic introduces the fundamental concepts of communication systems, including the typ...
Analog Communication
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Digital Communication
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Analog-to-Digital Conversion
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Digital-to-Analog Conversion
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Noise in Communication Systems
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Modulation and Demodulation
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Communication Channel Characteristics
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Information Theory
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Unit Outline 40h

Learning Objectives

5 objectives
  • Understand the fundamental principles and components of communication systems.
  • Differentiate between analog and digital communication techniques and their applications.
  • Explain the processes of analog-to-digital and digital-to-analog conversion.
  • Analyze the impact of noise on communication systems and methods to mitigate it.
  • Apply concepts of modulation, demodulation, and information theory to real-world communication scenarios.

Content Outline

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Unit 1978: Communication Systems

1. Introduction to Communication Systems

  • Overview of communication systems
  • Types of communication: analog vs digital
  • Components of a communication system
    • Transmitter
    • Channel
    • Receiver
  • Basic principles of analog communication
  • Basic principles of digital communication

2. Analog Communication

  • Definition and significance
  • Analog modulation techniques
    • Amplitude Modulation (AM)
      • Principles
      • Types (DSB, SSB, VSB)
    • Frequency Modulation (FM)
      • Principles
      • Modulation index
    • Phase Modulation (PM)
      • Principles
      • Relationship with FM
  • Advantages of analog communication
  • Limitations of analog communication

3. Digital Communication

  • Overview of digital communication systems
  • Digital modulation techniques
    • Amplitude Shift Keying (ASK)
      • Principle and waveform
    • Frequency Shift Keying (FSK)
      • Principle and waveform
    • Phase Shift Keying (PSK)
      • BPSK, QPSK variants
  • Digital data transmission concepts
  • Encoding and decoding methods

4. Analog-to-Digital Conversion

  • Purpose and importance
  • Sampling
    • Sampling theorem
    • Nyquist theorem
  • Quantization
    • Types of quantization
    • Quantization error
  • Encoding of sampled signals

5. Digital-to-Analog Conversion

  • Need for digital-to-analog conversion
  • Pulse Amplitude Modulation (PAM)
    • Concept and waveform
  • Pulse Code Modulation (PCM)
    • Steps: Sampling, Quantization, Encoding
  • Applications

6. Noise in Communication Systems

  • Introduction to noise
  • Types of noise
    • Thermal noise
    • Intermodulation noise
    • Quantization noise
  • Effects of noise on communication quality
  • Noise mitigation techniques
    • Filtering
    • Shielding
    • Error detection and correction

7. Modulation and Demodulation

  • Purpose of modulation
  • Modulation techniques overview
  • Detailed modulation schemes
  • Demodulation techniques
    • Coherent and non-coherent detection
  • Practical considerations in modulation/demodulation

8. Communication Channel Characteristics

  • Channel bandwidth
  • Signal-to-noise ratio (SNR)
  • Distortion types
  • Channel capacity
    • Shannon-Hartley theorem
  • Factors influencing communication quality

9. Information Theory

  • Introduction to information theory
  • Entropy and information content
  • Channel capacity revisited
  • Error-correcting codes
    • Basic concepts
    • Importance in reliable communication

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