The development of future digital mobile communication systems is inconceivable without a precise understanding of the specific transmission characteristics of the mobile communication channel. This book addresses various classes of frequency-selective and non-frequency-selective mobile communication channels. It also focuses on the description of simple and less complex methods for simulating mobile communication channels. In addition to knowledge of statistics, some fundamentals of system theory are assumed. The author places particular emphasis on a detailed derivation of the relationships, providing the reader with a high degree of mathematical coherence.