Study Unit
Analog And Digital Communication
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
PreviewUnit 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
- Amplitude Modulation (AM)
- 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
- Amplitude Shift Keying (ASK)
- 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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