The National Basic Research Program of China (973 Program)(2011CB302903);The National Natural Science Foundation of China(61100199);The National Natural Science Foundation of China(61100213);The National Natural Science Foundation of China(61170276);The National Natural Science Foundation of China(61201160);The Specialized Fund for the Doctoral Program of Higher Educa-tion(20113223120007);The Program of Natural Science for Universities of Jiangsu Province(10KJA510035);The Program of Natural Science for Universities of Jiangsu Province(12KJD510007);Open Research Fund of Key Lab of Broadband Wireless Comm and Netw Technology (NUPT) of Ministry of Education(NYKL201107)