作者机构:College of Computer, Nanjing University of Posts and Telecommunications, Nanjing 230001, China
相关基金:Acknowledgements This work was supported by the National Natural Science Foundation of China (60973139, 60773041), the Natural Science Foundation of Jiangsu Province (BK2008451), the Hi-Tech Research and Development Program of China (2006AA01Z201, 2008AA701201,2008AA701202, 2007AA01Z404, 2007AA01Z478), Foundation of National Laboratory for Modem Communications (9140C 1105040805), Postdoctoral Foundation of Jiangsu Province (0801019C), Science and Technology Innovation Fund for Higher Education Institutions of Jiangsu Province (CX08B-085Z, CX08B-086Z ).