CR系统中基于空分复用的上行链路设计  

Space division multiplexing-based uplink design for CR systems

作　　者：李钊[1] 刘勤[1] 赵林靖[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《华中科技大学学报（自然科学版）》2011年第11期29-33,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家杰出青年科学基金资助项目(60725105);国家重点基础研究发展计划资助项目(2009CB320404);国家自然科学基金资助项目(61102057);高等学校引智计划资助项目(B08038);ISN项目(ISN1103005)

摘　　要：设计了多天线认知无线电系统上行信号处理算法.该算法考虑移动终端尺寸、复杂度方面的约束,由认知基站完成接收波束成形及干扰抑制,认知终端仅进行发射波束成形,降低了终端复杂度,便于系统实现.在此基础上提出基于空分复用的机会频谱接入方法,认知系统通过合理的天线配置,当无法获得空闲频谱资源时以空分复用方式完成通信,并且保证对授权系统无干扰,相比于传统的机会频谱接入方法能够显著提高系统吞吐率.A signal processing algorithm for uplink transmission in multi-antenna cognitive radio system was designed,in which the equipment size and complexity constraints of the mobile station were considered.The cognitive base station carried out receiving beamforming and interference elimination,whereas cognitive terminal implemented transmitting beamforming only.The complexity of cognitive terminal was reduced and the system implementation was facilitated.Based on the above work,an opportunistic spectrum access scheme based on space division multiplexing（SDM-OSA） was proposed.With proper antenna configuration,cognitive transmission could be carried out using SDM on the premise that no interference was imposed on the primary even though there was no idle spectrum available.Compared with traditional OSA,throughput of cognitive system was notably enhanced.

关 键 词：认知无线电 多天线 上行链路 预编码 空分复用 

分 类 号：TN929.5[电子电信—通信与信息系统]