中文摘要：

Corresponding author.Xiang Gao was born in 1982. He received B.S. degree from Nanjing Normal University in 2004. He is now a Ph,D. candidate in College of Microelectronics, Xidian University. His current research interests include wireless sensor networks, target location and network on chip system. E-mail： cowboy-gx @ 163. com. Yintang Yang was born in 1963. He is a professor in College of Microelectronics, Xidian University. His research interests mainly include wireless sensor networks, VLSI design and SOC system. E-mail： ytyang@xidian.edu.cn Duan Zhou was born in 1957. She is a professor in College of Computer Science and Technology, Xidian University. Her research interests mainly include wireless sensor networks, SOC system and embedded systems. E-mail： zhouduan3788@ 126.com