摘要
分析了基于部分信道状态信息的天线选择的必要性,并对相关信道情况下角度扩散、信噪比和发送端天线配置方式对信道容量的影响进行了研究.提出根据信道状态动态确定发送天线子阵中的天线数目,从而确定反馈信息的数量.然后利用反馈向量在发送天线端进行波束形成,使得具有较高信道增益的子信道被选择用来进行数据传输.仿真结果表明,采用天线选择后系统可以根据信道状态确定参与传输的发送天线的数目,减小了系统配置的复杂度,降低了成本,并且在信道存在严重相关的场合下算法仍适用.
Analyzes the necessity to select antenna with partial channel-state information, and investigates the effects of angular spread, signal to noise ratio （SNR） and antenna configuration at transmitter on the capacity of MIMO system with correlated channel taken into account. A multi-mode antenna selection algorithm is proposed in which the number of active transmitters is determined dynamically according to the channel state, thus determining the amount of feedback information. Then, feedback vectors are used for beamforming at transmitting antenna so as to select some subehannels with higher gain for data transmission. Compared with a system using all available antennae, the simulation results showed that the system with antenna selection can reduce the complexity of system configuration and minimize the cost. Furthermore, the algorithm will keep applicable even if channels are strongly correlated,
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第4期386-389,共4页
Journal of Northeastern University(Natural Science)
基金
教育部博士点基金资助项目(20059145019)
河北省教育厅科学研究指导计划项目(Z2004103)
关键词
多输入多输出系统
天线选择
信道容量
相关信道
有效天线数目
部分状态信息
MIMO （multiple input multiple output）
antenna selection
channel capacity
correlated channel
number of useful antennae
partial channel-state information
