作者机构:Wireless Signal Processing and Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
相关基金:This work was supported by China Mobile Corporation Company (CMCC), the National Natural Science Foundation of China (60802082), the National Key Technology R&D Program of China(2008BAH30B 11), and the Research Fund for the Doctoral Program of Higher Education (200800131023).