Modulation Methods

Brief summary

This book describes essential fundamentals of both analogue and digital transmission systems,  in particular:

1. Objective of modulation and demodulation:  Frequency and time division multiplexing.  Ideal,  distortion-free and distorting system.  Quality criteria.
2. Amplitude modulation and associated demodulators:  Double sideband– and single sideband modulation.  Envelope and synchronous demodulation.
3. Angle modulation and associated demodulators:  Phase modulation and frequency modulation.  Signal-to-noise ratio with angle modulation.
4. Digital modulation techniques:  Pulse code modulation,  Linear modulation techniques  $($ASK,  BPSK,  BPSK$)$,  Nonlinear modulation  $($FSK,  MSK,  GMSK$)$.
5. Multiple access methods:  FDMA, TDMA, CDMA.  Multiplexers and demultiplexers.  CDMA spread sequences.  PN modulation:  Principle and realisation.

Notes:

• The description builds on the books  "Signal Representation"  and  "Linear and Time Invariant Systems". 

• Knowledge of  "Theory of Stochastic Signals"  is helpful,  but not essential.

• Further details on digital signal transmission  $($BER computation,  system optimisation, ...$)$  are covered in the book  "Digital Signal Transmission" .

⇒   Here first an  »content overview«  by means of the  »five main chapters«  with a total of  »23 individual chapters«  and  »192 sections«.

Content

General Description

• Objectives of Modulation and Demodulation
• Quality Criteria
• General Model of Modulation

Amplitude Modulation and Demodulation

• Double-Sideband Amplitude Modulation
• Synchronous Demodulation
• Envelope Demodulation
• Single-Sideband Modulation
• Further AM Variants

Angle Modulation and Demodulation

• Phase Modulation (PM)
• Frequency Modulation (FM)
• Influence of Noise on Systems with Angle Modulation

Digital Modulation Methods

• Pulse Code Modulation
• Linear Digital Modulation
• Quadrature Amplitude Modulation
• Non-Linear Digital Modulation

Multiple Access Methods

• Tasks and Classification
• Direct-Sequence Spread Spectrum Modulation
• Spreading Sequences for CDMA
• Error Probability of Direct-Sequence Spread Spectrum Modulation
• General Description of OFDM
• Implementation of OFDM Systems
• OFDM for 4G Networks
• Further OFDM Applications

Exercises and multimedia

In addition to these theory pages,  we also offer exercises and multimedia modules on this topic,  which could help to clarify the teaching material:

$(1)$    $\text{Exercises}$

$(2)$    $\text{Learning videos}$

$(3)$    $\text{Applets}$ 

Further links

$(4)$    $\text{Bibliography}$

$(5)$    $\text{Impressum}$

In addition to these theory pages, we also offer exercises and multimedia modules that could help to clarify the teaching material:

• $\text{Exercises}$
• $\text{Learning videos}$
• $\text{Applets}$

$\text{Other links:}$

$(1)$    $\text{Bibliography to the book}$

$(2)$    $\text{General notes about the book}$   (authors,  other participants,  materials as a starting point for the book,  list of sources)

In addition to these theory pages,  we also offer tasks and multimedia modules on this topic,  which could help to clarify the teaching material:

• $\text{Exercises}$
• $\text{Learning videos}$
• $\text{Applets}$ 

$\text{Further links:}$

$(1)$    $\text{Bibliography for the book}$

$(2)$    $\text{General notes about the book}$   (authors,  other participants,  materials as a starting point for the book,  list of sources)