数据采集与处理2017，Vol.32Issue(3)：497-506,10.DOI:10.16337/j.1004-9037.2017.03.008
改进PU2RC的下行MU-MIMO自适应发送方案
Adaptive Transmission Scheme with Modified PU2RC for Downlink MU-MIMO Systems
摘要
Abstract
Aiming that the per-user unitary and rate control(PU2RC) algorithm cannot work well in the low number of users and high signal to noise ratio(SNR) in multi-user multiple-input multiple-output (MU-MIMO) system,a downlink adaptive transmission scheme with reconstructing channel information and searching optimal number of service users at the base station is proposed.The base station firstly reconstructs the downlink channel vector using the norm of channel vector and channel direction information (CDI) fed back by users.Then,the user set corresponding to each codebook matrix is expanded by sharing the users among the similar codebook vectors.Finally,the optimal set of service users is selected to maximize the system sum rate.The proposed scheme improves the probability of multi-user transmission with the low number of users and obtains the tradeoff between the inter-user interference and the number of service users.The sum rate of the proposed system is higher than that of the traditional PU2RC algorithm and the existing improved schemes.关键词
多输入多输出/多用户/每用户酉速率控制/自适应发送Key words
multiple input multiple output/multi-user/per-user unitary and rate control (PU2RC)/adaptive transmission分类
信息技术与安全科学引用本文复制引用
张国梅,任俊臣,吕刚明,李国兵,孙浩..改进PU2RC的下行MU-MIMO自适应发送方案[J].数据采集与处理,2017,32(3):497-506,10.基金项目
地理信息工程国家重点实验室开放研究基金(SKLGIE2016-Z-2-5)资助项目 （SKLGIE2016-Z-2-5）
国家自然科学基金(61401350)资助项目. （61401350）
