作者机构:[1]Wireless Signal Processing and Network Lab (Key Lab of Universal Wireless Communication, Ministry of Education), Beijing University of Posts and Telecommunications, Beijing 100876, China, [2]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
相关基金:Acknowledgements This work was supported by the National Natural Science Foundation of China (60572120, 60602058), the Hi-Tech Research and Development Program of China (2006AA01Z257), the National Basic Research Program of China (2007CB310602).