广义多载波系统中基于双循环自适应时隙结构的空时联合检测  

Space-time detection based on dual-circular adaptive slot structure for generalized multi-carrier transmission systems

作　　者：滑瀚[1] 高西奇[1] 尤肖虎[1] 

机构地区：[1]东南大学,移动通信国家重点实验室,南京210096

出　　处：《高技术通讯》2006年第10期991-995,共5页Chinese High Technology Letters

基　　金：863重大项目（2001AA123015，2003AA123310）资助

摘　　要：广义多载波并行传输方案是一种宽子带方案,每个子带带宽达到1.28MHz且子带交叠在-15dB以下.这种多载波结构能够有效地克服多载波系统的峰均比问题和对频偏的敏感度.首先给出了广义多载波并行传输方案的数字基带模型.为了便于信道估计和信号检测,设计了一种双循环的自适应时隙结构,基于该结构设计了频域均衡空时联合检测器,并证明它是最小均方误差准则下的最优检测器.最后在ITU M.1225信道下计算机仿真证明了该方案在宽带移动通信环境中的有效性.Generalized Multi-Carrier transmission is a wide subband scheme, in which the subbands are 1.28MHz wide and overlaps below - 15dB. Firstly, the digital base band model of generalized multi-carrier system is given. A dual-circular adaptive slot structure is proposed, which is convenient for channel estimation and signal detection. Based on this struc- ture, a low-complexity space-time detector of frequency domain equalization is given. The detector is proved to be optimal under the minimum mean square error （MMSE） criterion. Simulation results in ITU M. 1225 channel show that the proposed scheme is effective for wide-band mobile transmission.

关 键 词：广义多载波 自适应时隙结构 频域均衡 空时检测 多天线 

分 类 号：TN929.5[电子电信—通信与信息系统]