一种容量上界最大化的量化反馈方法  

Quantized-feedback scheme based on capacity upperbound maximizing in the MIMO BC system

作　　者：解芳[1] 袁超伟[1] 程铁铮[2] 赵伟[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876 [2]华为技术有限公司,北京100085

出　　处：《西安电子科技大学学报》2010年第3期554-558,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60872149;60672132)

摘　　要：研究了多输入多输出广播通信(MI MO BC)系统中的信道量化反馈问题.通过分析得到了一个接收用户容量上界,并基于该上界最大化构造了一种新的量化反馈方法.该方法采用随机量化码本,不仅考虑了信道的方向还考虑了子信道增益信息.仿真结果表明,相对只量化反馈信道方向信息的方法,该方法不仅显著提高了量化误差存在下的系统容量,并且复杂度更低.The quantization and limited feedback of channel state information （CSI） for the Multipleinput Multiple output Broadcasting Channel（MIMO BC） are considered. Through analysis, a capacity upperbound for the receiver is derived and a novel quantized-feedback scheme is constructed based on this bound maximizing. The novel scheme utilizes the benefits of the random quantization codebook and considers not only the channel direction but also the gain of the sub-channel. Simulation shows that the proposed scheme improves the system capacity in the presence of quantization errors obviously and has less complexity than the conventional method, which only includes channel direetion information.

关 键 词：多输入多输出 广播信道 随机量化码本 量化 反馈 容量上界 

分 类 号：TN911[电子电信—通信与信息系统]