Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Review Article MIMO Technologies in 3GPP LTE and LTE-Advanced | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 302092 10 pages doi 2009 302092 Review Article MIMO Technologies in 3GPP LTE and LTE-Advanced Juho Lee 1 Jin-Kyu Han 1 and Jianzhong Charlie Zhang2 1Digital Media Communications R D Center Samsung Electronics 416 Maetan-3dong Yeongtong-gu Suwon-si 443-742 South Korea 2Wireless System Lab Samsung Telecom America 1301 E. Lookout Drive Richardson TX 75082 USA Correspondence should be addressed to Juho Lee Received 13 February 2009 Accepted 31 May 2009 Recommended by Angel Lozano 3rd Generation Partnership Project 3GPP has recently completed the specification of the Long Term Evolution LTE standard. Majority of the world s operators and vendors are already committed to LTE deployments and developments making LTE the market leader in the upcoming evolution to 4G wireless communication systems. Multiple input multiple output MIMO technologies introduced in LTE such as spatial multiplexing transmit diversity and beamforming are key components for providing higher peak rate at a better system efficiency which are essential for supporting future broadband data service over wireless links. Further extension of LTE MIMO technologies is being studied under the 3GPP study item LTE-Advanced to meet the requirement of IMT-Advanced set by International Telecommunication Union Radiocommunication Sector ITU-R . In this paper we introduce various MIMO technologies employed in LTE and provide a brief overview on the MIMO technologies currently discussed in the LTE-Advanced forum. Copyright 2009 Juho Lee et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction As multimedia communications become increasingly popular mobile communications are expected to reliably support .
