1. Xi’an Jiaotong University,School of Information and Communications Engineering,Xi’an,China
2. Academy of Mathematics and Systems Science, Chinese Academy of Sciences,Beijing,China
3. Shanghai Huawei Technologies Co. Ltd.,Wireless Network RAN Research Department,Shanghai,China
4. Peking University,School of Electrical Engineering and Computer Science,Beijing,China
5. The University of Sydney,School of Electrical and Information Engineering,Sydney,NSW,Australia,2006