Space-Time Adaptive Processing (STAP) technology fully utilizes the multiple spatial channel information provided by airborne phased array radars and the temporal information provided by coherent pulse trains, enabling effective suppression of clutter and interference in the spatial-temporal two-dimensional domain. As a key technology for enhancing the performance of airborne radars, it has received significant attention in the radar field both domestically and internationally in recent years. This book, with the background of airborne early warning radars, systematically and deeply discusses the theory, methods, and related technical issues encountered during the practical engineering application of Space-Time Adaptive Processing.