naa a22 4500 510796370 CHVBK 20180411083338.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11277-012-0530-9 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0530-9 Adaptive Beamforming in CR-MIMO System Exploiting Multi-Channel and Eigenmode Diversity [Elektronische Daten] [Zhao Li, Liyuan Xiao, Jiawei Yang] In this paper, a space division multiplexing (SDM) based joint adaptive beamforming downlink transmission scheme for infrastructured cognitive radio multi-input multi-output system is proposed. When spectrum holes exist traditional opportunistic spectrum access is employed. While there is no idle spectrum available, cognitive base station and cognitive user firstly evaluate spatial correlation between cognitive transmission and inter-system interference based on the preprocessed channel information. Incorporated with transmission gain, authorized frequency channel and eigenmode are jointly selected. Then on the premise that no interference is imposed on the primary, cognitive transmission is carried out adopting SDM. The proposed scheme exploits selection diversity of both authorized channel and cognitive eigenmode, thus achieves better spatio-frequency resource management and near-optimal cognitive throughput performance. Springer Science+Business Media, LLC., 2012 Cognitive radio nationallicence Multi-input multi-output nationallicence Beamforming nationallicence Space division multiplexing nationallicence Li Zhao State Key Laboratory of Integrated Service Networks, Xidian University, No.2 Taibai Rd., Mailbox 102, 710071, Xi'an, Shaanxi Province, People's Republic of China aut Xiao Liyuan State Key Laboratory of Integrated Service Networks, Xidian University, No.2 Taibai Rd., Mailbox 102, 710071, Xi'an, Shaanxi Province, People's Republic of China aut Yang Jiawei State Key Laboratory of Integrated Service Networks, Xidian University, No.2 Taibai Rd., Mailbox 102, 710071, Xi'an, Shaanxi Province, People's Republic of China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1403-1413 0929-6212 68:4<1403 2013 68 11277 https://doi.org/10.1007/s11277-012-0530-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0530-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Zhao State Key Laboratory of Integrated Service Networks, Xidian University, No.2 Taibai Rd., Mailbox 102, 710071, Xi'an, Shaanxi Province, People's Republic of China aut NATIONALLICENCE 700 1- Xiao Liyuan State Key Laboratory of Integrated Service Networks, Xidian University, No.2 Taibai Rd., Mailbox 102, 710071, Xi'an, Shaanxi Province, People's Republic of China aut NATIONALLICENCE 700 1- Yang Jiawei State Key Laboratory of Integrated Service Networks, Xidian University, No.2 Taibai Rd., Mailbox 102, 710071, Xi'an, Shaanxi Province, People's Republic of China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1403-1413 0929-6212 68:4<1403 2013 68 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer