Advanced MIMO Techniques in the Heterogeneous Networks

1 Beijing Key Lab of New Generation Broadband Wireless Mobile Communication Technology, Standard and Verification, China Academy of Telecommunication Research of MIIT (CATR), Beijing 100191, China 2 Faculty Development Center, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China 3 School of Telecommunications and Information Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China 4The Communications Group, Department of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK 5McGill University, 3480 Rue University, Montreal, Canada H3A 0E9