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: Editorial Radar and Sonar Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 948604 2 pages doi 2010 948604 Editorial Radar and Sonar Sensor Networks Qilian Liang EURASIP Member 1 Xiuzhen Cheng 2 Scott. . Huang 3 Sherwood W. Samn 4 Lingming Wang 5 and Zheng Zhou6 1 Department of Electrical Engineering University of Texas at Arlington Arlington TX 76019-0016 USA 2 Department of Computer Science The George Washington University Washington DC 20052 USA 3 Department of Electrical Engineering National TsingHua University Hsinchu 30013 Taiwan 4 Air Force Research Laboratory RHX Brooks City Base San Antonio TX 78235 USA 5 Core Software Department iBiquity Digital Corporation 150 Allen Road Suite 201 Basking Ridge NJ 07920 USA 6 School of Information and Telecommunications Beijing University of Posts and Telecommunications Beijing 100876 China Correspondence should be addressed to Qilian Liang liang@ Received 23 September 2010 Accepted 23 September 2010 Copyright 2010 Qilian Liang et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Although radar and sonar rely on two fundamentally different types of wave transmission Radio Detection and Ranging RADAR and Sound Navigation and Ranging SONAR both are remote sensing systems with important military scientific and commercial applications. RADAR sends out electromagnetic waves while active SONAR transmits acoustic . sound waves. In both systems these waves return echoes from certain features or targets that allow the determination of important properties and attributes of the target . shape size speed distance etc. . Because electromagnetic waves are strongly attenuated diminished in water RADAR signals are mostly used for ground or atmospheric observations. Because SONAR signals easily penetrate water they
