naa a22 4500 510793797 CHVBK 20180411083329.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11277-012-0761-9 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0761-9 Scalable Video Multicast Over Multi-Antenna OFDM Systems [Elektronische Daten] [Zan Yang, Yuping Zhao] We propose a framework for efficient scalable video multicast over downlink orthogonal frequency-division multiplexing (OFDM) systems with multiple transmit antennas. In conventional video multicast systems, the achievable transmission rate is determined by the user with the worst channel condition, and the system saturates the capacity when the number of users increases. To accommodate the heterogeneous channel conditions and device capabilities of various users, scalable video coding (SVC) encodes video streams into base and enhancement layers. We exploit the advances in multi-antenna OFDM and the layered nature of SVC, and propose a framework for scalable video multicast which guarantees the base layer quality for all users while making best use of limited resource for the enhancement layer of users with good channel conditions. We show that the resource allocation that includes the transmit precoding, subcarrier allocation, and bit and power allocation is a very difficult optimization problem. A low-complexity suboptimal algorithm is proposed which is suitable for practical implementations. Simulation results are provided to show the effectiveness of the proposed solution. Springer Science+Business Media, LLC., 2012 Scalable video nationallicence Multicast nationallicence OFDM nationallicence Multiple antennas nationallicence Resource allocation nationallicence Yang Zan State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, 100871, Beijing, People's Republic of China aut Zhao Yuping State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, 100871, Beijing, People's Republic of China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 70/4(2013-06-01), 1487-1504 0929-6212 70:4<1487 2013 70 11277 https://doi.org/10.1007/s11277-012-0761-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0761-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yang Zan State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, 100871, Beijing, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Yuping State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, 100871, Beijing, People's Republic of China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 70/4(2013-06-01), 1487-1504 0929-6212 70:4<1487 2013 70 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer