This book provides a comprehensive resource and thorough treatment of the latest development of digital RF memory (DRFM) technology and its key role in maintaining dominance over the electromagnetic spectrum. Part I discusses the use of advanced technology to design transceivers for spectrum sensing using unmanned systems. Part II explains how artificial intelligence and machine learning enable modern spectrum sensing and detection signal processing for electronic support and electronic attack. Counter-DRFM techniques are also examined. DRFM and transceiver design details and examples are provided along with MATLAB(R) software, allowing readers to construct their own embedded DRFM transceivers for unmanned systems.