The book "Estimation Methods and Techniques in Digital Communication Systems" offers a comprehensive analysis of the estimation methods and techniques that are significant for digital transmission technology in future telecommunications networks. It addresses the modeling of transmission channels, which can be represented by a cascade of elementary channels. A central aspect is the estimation of parameters and distribution functions that characterize the statistical properties of error sequences in the channel. The methods presented are essential for both industry and academic research, particularly when it comes to time-efficient and reliable data processing obtained through measurements or simulations. Practical examples related to the measurement of broadband radio propagation, error correction codes, and the modeling of digital channels illustrate the broader applicability of the developed techniques.