基金Supported by the National High-Tech Research and Development Programme of China under Grant No 2006AA01Z419, the Major Research Plan of the National Natural Science Foundation of China under Grant No 90604023, the National Laboratory for Modern Communications Science Foundation of China under Grant No 9140Cl101010601, and the Natural Science Foundation of Beijing under Grant No 4072020.
基金Supported by the National High Technology Research and Development Programme of China under Grant No 2006AA01Z4191 the Major Research Plan of the National Natural Science Foundation of China under Grant No 90604023, the National Laboratory for Modern Communications Science Foundation of China under Grant No 9140C1101010601, the Natural Science Foundation of Beijing under Grant No 4072020, and the Open Foundation of State Key Laboratory of Integrated Services Network, Xidian University.