.png){kind=icon}
返回
Coordinated Multi-Cell Systems: Carrier Frequency Offset Estimation and Correction
.png){kind=icon}
PRE
AI
DOI：10.1109/JSAC.2010.101210.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
We consider a coordinated multi-cell (CMC) system and the associated problem of independent carrier frequency offsets (CFOs) at the basestations (BSs). These BS CFOs cause accumulated phase errors that compromise downlink beamforming accuracy, and consequently degrade the spectral efficiency of the CMC system. Since the inherent structure of coordinated downlink beamforming techniques makes it impossible to correct for the BS CFOs at the mobile subscriber (MS), our topic is estimation and correction of the BS CFOs at the BSs. Our method begins with the formation of MS-side estimates of the BS CFOs, which are then fed back to the coordinated BSs. We then derive an optimum maximum likelihood (ML) estimator for the BS CFOs that uses independent MS-side CFO estimates and average channel signal-to-noise ratios. However, it is demonstrated that the CFOs of the MSs themselves introduce a bias to the optimal BS CFO estimator. To compensate for this bias, a joint BS and MS CFO estimator is derived, but shown both to require high computation and have rank deficiency. This motivates an improved technique that removes the rank problem and employs successive estimation to reduce computation. It is demonstrated to overcome the MS CFO bias and efficiently solve the joint BS and MS CFO problem in systems that have low to moderate shadowing. We term the full BS CFO estimation and correction procedure BS CFO tightening.
Keyword:
Carrier frequency offset
coordinated multi-cell
multi-user
multi-base
MIMO
frequency estimation
frequency correction
coordinated systems
macrodiversity
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
17.2
论文数:
6.4K
被引数:
3.1W
机构
引用论文
.png){kind=icon}
Improved transmit null steering for MIMO-OFDM downlinks with distributed base station antenna arrays
PREAI
分享收藏On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming关于使用迫零波束成形的多天线广播调度的最优性
PREAI
分享收藏分享收藏
查看更多内容