Digital Communications

Part 1: Telecommunication Systems

• 1: Digital Communications
  • Abstract
  • 1.1 Introduction
  • 1.2 Qualities of the digital communications
  • 1.3 Advantages of digital communications
  • 1.4 Definitions
  • 1.5 Diagram of digital communications
• 2: Supports of Digital Communications
  • Abstract
  • 2.1 Introduction
  • 2.2 The radio beams
  • 2.3 The satellites
  • 2.4 The optical fiber
  • 2.5 The radar

Part 2: Baseband Digital Communications

• 3: Baseband Communications
  • Abstract
  • 3.1 Sampling the signals
  • 3.2 Coding the samples
  • 3.3 Time multiplexing
  • 3.4 Spectrum of the different binary representations
  • 3.5 Frequency of the clock
• 4: The Channel
  • Abstract
  • 4.1 Regeneration of the signal: general diagram
  • 4.2 Detection of a noisy digital signal
  • 4.3 Equalization of the transfer function of the support
• 5: Nyquist Criteria
  • Abstract
  • 5.1 Transmission without inter-symbol interference
  • 5.2 First Nyquist criterion
  • 5.3 Second Nyquist criterion
  • 5.4 Third Nyquist criterion
  • 5.5 Error probability of the whole line
• 6: Analog-to-Digital Conversion: Compression and Extension
  • Abstract
  • 6.1 Compression and coding
  • 6.2 Quantization
  • 6.3 Noise's quantization
  • 6.4 Limitation noise
  • 6.5 Compression and extension
  • 6.6 Introduction to coding

Part 3: Digital Transmissions on Carriers' Frequency

• 7: Phase Shift Keying Modulations
  • Abstract
  • 7.1 Introduction
  • 7.2 Amplitude, frequency and phase modulation
  • 7.3 Phase shift keying: coherent PSK of order 2
  • 7.4 PSK of order 4
  • 7.5 PSK of order height and 16
• 8: Differential Coding
  • Abstract
  • 8.1 Introduction
  • 8.2 Differential coding of order 2
  • 8.3 Differential modulation of order 4
• 9: Demodulations
  • Abstract
  • 9.1 Coherent demodulation
  • 9.2 Differential demodulation
• 10: Quality of the Digital Transmissions
  • Abstract
  • 10.1 Introduction
  • 10.2 Differential demodulation of order 2
  • 10.3 Coherent modulation of order 2
  • 10.4 Modulation (coherent or non-coherent) of order 4
  • 10.5 The noise and the error

Part 4: Exercises and Problems

• 11: Supports
  • Abstract
  • 11.1 Power links
  • 11.2 Antennas
  • 11.3 Simple designs of duplexers and multiplexers
• 12: Modulations and Demodulations Without Noise
  • Abstract
  • 12.1 Amplitude modulation system
  • 12.2 Coherent amplitude demodulation system
  • 12.3 Quadrature multiplexing system
• 13: Modulations and Demodulations With Noise
• Abstract
• 13.1 Demodulation in the presence of noise using a triangular filter
• 13.2 Detection of a digital signal with the presence of noise
• 13.3 Digital transformation of an analogic signal