Dr. James Tsui was the world's leading authority on Electronic Warfare (EW) receiver technology. His pioneering work has resulted in over 50 awarded patents, and he has been recognized as an Air Force Research Laboratory (AFRL) and Institute of Electrical and Electronics Engineers (IEEE) Fellow. Among his 90 publications, Dr. Tsui has authored seven books on receivers: two on analog EW receivers, three on digital EW receivers, and two on software GPS receivers. These books are used as primary references by engineers and scientists developing advanced receiver technologies for many diverse sensing applications, including EW, radar, communications and navigation systems. The books have been the basis for university graduate courses and highly sought-after short courses developed and taught to all three DoD services and DoD industrial companies internationally. Dr. Tsui passed away in 2019.