Zheng Jianping, bom in 1981. He received the B.S. degree and M.S. degree in communication and information system from Xidian University, Xi 'an, P.R. China in 2003 and 2006, respectively. He is currently working towards the Ph. D degree at Xidian University, cominuing his research on wireless communications and error control coding.To whom correspondence should be addressed. E-mail: jpzheng@xidian.edu.cn