Zhang Tingting was born in 1980. He received B.S. and M.S. degrees from Harbin Institute of Technology (HIT) in 2003 and 2005 respectively. Since Sept. 2005, he was a Ph.D. candidate of HIT. His research interests are UWB communications and applications. E-mail: ztt_44@163.com Zhang Qinyu was born in 1972. He is now a professor and doctoral advisor at the Harbin Institute of Technology Shenzhen Graduate School. His research interests are UWB, wireless communication network, bio-medical engineering and deep space communication, etc. Zhang Naitong was born in 1934. He is an academician at the Chinese Academy of Engineering, and a professor and doctoral advisor at the HIT. His research interests are UWB, satellite communication, trunked radio system, and C^4ISR network, etc. Xu Hongguang was born in 1963. He is now an associate professor at the Harbin Institute of Technology Shenzhen Graduate School. His research interests are embedded system, UWB communication, high speed circuits design, etc.