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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Communications Systems Center, Northrop Grumman | EURASIP Journal on Applied Signal Processing 2005 1 1-3 2005 Hindawi Publishing Corporation Editorial Joe C. Chen Communications Systems Center Northrop Grumman Space Technology CA 90278 USA Email joe. chen@ngc. com Amin G. Jaffer Space and Airborne Systems Raytheon Company CA 90245 USA Email ajaffer@raytheon.com The sensor array technology has proven itself to be one of the most active research subjects in the past few decades. The initial concept which originated from aerospace applications now finds itself evolving in many other dimensions to a vast variety of applications. Recently there has been a lot of interest in developing sensor networks for the military and security to monitor an area including detecting identifying locating and tracking the emission signals of interest. Similar ideas have been found in microphone and seismic arrays where audio seismic signals can be enhanced under noisy conditions and objects may be tracked with the directional capability the sensor array provides. The recent US FCC E911 requirement to locate the mobile phone users upon emergency has also brought a new wave of interests in the subject within the communications community. The research in smart antennas to combat multipath fading provide interference suppression and enhance capacity for communication systems has also been a very popular subject. In the aerospace community recent focus has been on space-time adaptive processing STAP techniques to provide state-of-the-art moving target detection in the presence of jamming and clutter and high-resolution radar imaging. Over the years the classical array signal processing methods have been modified toward different types of sensors with different classes of algorithms adapting to different signals and media of propagation. Many seek to provide robust performance in practical environments or exploit new properties of a specific problem and others seek to provide efficient solutions with minimum implementation costs. In the .
