Signal Representation
The mathematical description of communication signals in the time and frequency domain is covered: Fourier series for periodic signals, Fourier transform for aperiodic signals with low-pass and band-pass character and the special features of time-discrete signals. Scope: 2L + 1E.
Linear and Time-Invariant Systems
Based on the book "Signal representation"; it is described how the influence of a filter on deterministic signals can be mathematically determined. The book deals with distortion, the Laplace transform for causal systems and the properties of electrical lines. Scope: 2L + 1E.
Stochastic signal theory
The focus is on stochastic signals and their modelling Starting from probability theory, discrete and continuous random variables without and with statistical bindings are introduced and the influence of a filter on stochastic signals is described. Scope: 3L + 2E.
Information theory
It covers Shannon's information theory for discrete and continuous sources and his theorems for source and channel coding. Channel codes specifically add redundancy, source codes remove unnecessary redundancy (data compression). Scope: 2L + 1E.
Modulation schemes
This book describes the basics of analog and digital transmission. It covers both the analog modulation schemes(AM, PM, FM) and the more important digital modulation (ASK, PSK, FSK, QAM, ...) as well as multiple access methods (CDMA, OFDM). Scope: 3L + 2E.
Digital signal transmission
The probability of error is the decisive quality feature of digital systems. Its calculation is first explained for idealized conditions, then taking into account line coding and pulse interference. Finally, digital channel models are discussed. Scope: 3L + 2E.
Mobile Communications
If the transmitter and/or receiver moves, the channel is time-variant. Non-frequency-selective fading (Rayleigh, Rice) and frequency-selective fading due to multipath reception are treated. GSM and UMTS are briefly described, the 4G system LTE in more detail. Scope: 2L + 1E.
Channel coding
Channel coding includes methods for error detection and correction, which often are the only factors, that make transmission possible when the channel is poor. Described are linear block codes, Reed-Solomon codes and convolutional and turbo codes as well as their (possibly iterative) decoding. Scope: 3L + 2E.
Examples of communication systems
The last textbook uses current and also commercially successful communication systems to show that the theoretical foundations of the first eight books are certainly relevant to practice. ISDN and DSL for the landline network as well as the mobile communication systems GSM and UMTS are considered. Scope: 3L + 1E.
Biographies and bibliographies
The last book of our learning tutorial LNTww contains biographies of important engineers and scientists and a compilation of suitable technical literature for the individual books. In addition, the many people involved in this eLearning project (in one form or another) are introduced.
