检索结果-内蒙古大学图书馆

Performance of partitioned vector quantization with Optimized Feedback Budget Allocation

IEICE TRANSACTIONS ON COMMUNICATIONS 2014年第6期E97B卷 1184-1194页

作者： Kibria, Mirza Golam Murata, Hidekazu Yoshida, Susumu Kyoto Univ Grad Sch Informat Kyoto 6068501 Japan

This study analyzes the performance of a downlink beamformer with partitioned vector quantization under optimized feedback budget allocation. A multiuser multiple-input single-output downlink precoding system with perfect channel state information at mobile stations is considered. The number of feedback bits allocated to the channel quality indicator (CQI) and the channel direction indicator (CDI) corresponding to each partition are optimized by exploiting the quantization mean square error. In addition, the effects of equal and unequal partitioning on codebook memory and system capacity are studied and elucidated through simulations. The results show that with optimized CQI-CDI allocation, the feedback budget distributions of equal or unequal partitions are proportional to the size ratios of the partitioned subvectors. Furthermore, it is observed that for large-sized partitions, the ratio of optimal CDI to CQI is much higher than that for small-sized partitions.

关键词： partitioned vector quantization feedback budget optimization multiuser-MISO Nonlinear precoding

来源：评论

学校读者我要写书评

暂无评论

Feedback Budget Allocation Optimization for P-VQ in Downlink Beamforming

Feedback Budget Allocation Optimization for P-VQ in Downlink...

引用

IEEE 24th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Kibria, Mirza Golam Murata, Hidekazu Yoshida, Susumu Kyoto Univ Grad Sch Informat Kyoto Japan

ISBN: (纸本)9781467362351

In this paper, we analyze the performance of a downlink beamforming system with partitioned vector quantization (P-VQ). A multiuser multiple-input single-output (MU-MISO) downlink beamforming system with accurate channel state information (CSI) at user terminals is considered. The optimization of feedback bits allocation to different partitions and channel direction indicator (CDI), channel quality indicator (CQI) corresponding to each partition has been performed exploiting quantization mean square error (MSE). The impacts of equal and unequal partitioning, and the number of partitions on codebook memory and overall system capacity have also been investigated and depicted through simulation results. We have found that with optimized CQI and CDI bits allocations, the amount of bits allotted to equal and unequal partitions are proportional to the size ratios of the respective partitioned sub-vectors. It has also been observed that for small-sized partitions, the optimal ratio of CDI to CQI is much smaller than that of large-sized partitions.

关键词： partitioned vector quantization Feedback budget optimization Multiuser-MISO Nonlinear precoding etc.

来源：评论

学校读者我要写书评

暂无评论

Adaptive Feedback Reduction for P-VQ in MU-MISO Downlink Precoding

Adaptive Feedback Reduction for P-VQ in MU-MISO Downlink Pre...

引用

IEEE 78th Vehicular Technology Conference (VTC Fall)

作者： Kibria, Mirza Golam Murata, Hidekazu Yoshida, Susumu Kyoto Univ Grad Sch Informat Kyoto Japan

ISBN: (纸本)9781467361873

In this study, an adaptive and variable-rate feedback reduction technique for partitioned vector quantization (P-VQ) in MU-MISO downlink precoding is proposed. Independent feedback reduction is performed for both channel quality indicator (CQI) and channel direction indicator (CDI) over slowly-varying Rayleigh channel. The users adaptively reduce the feedback overhead for quantized channel state information (CSI) depending on the rate and direction of change in the correlated CQIs and CDIs. Simulation results show that the proposed scheme greatly lessens the communication overhead with very small performance loss and enhances the quantization efficiency.

关键词： Feedback reduction partitioned vector quantization MU-MISO Nonlinear precoding etc.

来源：评论

学校读者我要写书评

暂无评论

Feedback Budget Allocation Optimization for P-VQ in Downlink Beamforming

Feedback Budget Allocation Optimization for P-VQ in Downlink...

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

作者： Mirza Golam Kibria Hidekazu Murata Susumu Yoshida Graduate School of Informatics Kyoto University Kyoto Japan

ISBN: (纸本)9781467362337

关键词： partitioned vector quantization Feedback budget optimization Multiuser-MISO Nonlinear precoding etc

来源：评论

学校读者我要写书评

暂无评论

Adaptive Feedback Reduction for P-VQ in MU-MISO Downlink Precoding

Adaptive Feedback Reduction for P-VQ in MU-MISO Downlink Pre...

引用

IEEE Vehicular Technology Conference

作者： Mirza Golam Kibria Hidekazu Murata Susumu Yoshida Graduate School of Informatics Kyoto University Kyoto Japan

ISBN: (纸本)9781467361866

关键词： Feedback reduction partitioned vector quantization MU-MISO Nonlinear precoding etc Feedback prediction coding Downlink Self tuning channel quality indicator vector quantization

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：