发明名称 |
Method and apparatus for multiple input multiple output distributed antenna arrays |
摘要 |
<p>The present invention is concerned with transmissions from multiple distributed transmission points to a user terminal. The transmit points and the user terminal each have a multiple-input-multiple-output (MIMO) capability. For example, the present invention could be applied to coordinated multi-point (CoMP) transmissions. The user terminal determines a transmission rank and a precoding matrix for each of at least two transmission points of a plurality of transmission points. A joint transmission rank for a joint transmission involving each of the at least two transmission points is determined. Next, the user terminal selects a joint precoding matrix which provides the joint transmission rank and is based on the precoding matrices of respective transmission points. The user terminals transmits channel state information (CSI) including a description of the selected joint precoding matrix. The pre-coding matrix may be a diagonal matrix or a semi-diagonal matrix. It may include an intra-transmission point precoder and an inter-transmission point combiner. Also disclosed is a transmit point which uses received CSI reports to determine whether to operate in a MU-MIMO or SU-MIMO mode.</p> |
申请公布号 |
GB2491423(B) |
申请公布日期 |
2013.06.05 |
申请号 |
GB20110016623 |
申请日期 |
2011.09.27 |
申请人 |
RENESAS MOBILE CORPORATION |
发明人 |
TOMMI T KOIVISTO;MIHAI ENESCU;TIMO E ROMAN;KAROL SCHOBER |
分类号 |
H04B7/02 |
主分类号 |
H04B7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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