南京邮电大学学报（自然科学版）2012，Vol.32Issue(6)：17-21,5.
多用户认知无线电系统中波束成形技术研究
Study on Beamforming in Multi-user Cognitive Radio Network
摘要
Abstract
Multi-input multi-output (MIMO) technology provides the system with sharing space,increasing the degrees of freedom of space in addition to time and frequency, which can reduce interference to the primary user ( PU ) and improve the capacity of secondary user ( SU ). In this paper, both of the primary base station(PBS) and the secondary base station(SBS) are equipped with multi-antennas. The PU receiver communicates to the SU transmitter the channel state information through the finite-rate feedback channel,so a cognitive beamforming(CB) algorithm based on the limited feedback is proposed. The expressions of the outage probability are presented. From the simulation results,it can be seen that the outage probability of both links is lower. There exists an asymptotic value which the outage probability of SU approaches.关键词
认知无线电/MIMO/波束成形/有限反馈Key words
cognitive radio/MIMO/beamforming/limited feedback分类
信息技术与安全科学引用本文复制引用
汪明,宋荣方..多用户认知无线电系统中波束成形技术研究[J].南京邮电大学学报（自然科学版）,2012,32(6):17-21,5.基金项目
国家重点基础研究发展计划(973计划)(2007CB310607)、国家自然科学基金(60972041)、江苏省高校自然科学基础研究计划重大项目(08KJD510001)、教育部博士点基金(200802930004)、东南大学移动通信国家重点实验室开放课题(N200809)和国家科技重大专项(2009ZX03003-006)资助项目 （973计划）
