This book is devoted to robust signal processing problems in complex radar systems and their features. The first part discusses the main design principles of the modern robust digital signal processing algorithms applied to complex radar systems, while the second part addresses the design of computer systems for these algorithms, providing real-world examples. The third part deals with experimental measurements of the main stochastic process statistical parameters and defines their estimations for robust signal processing in complex radar systems. Each chapter provides a summary and analysis of the observations obtained by computer modeling and experiments.