发明申请
US20070253386A1 PROVIDING CQI FEEDBACK TO A TRANSMITTER STATION IN A CLOSED-LOOP MIMO SYSTEM
失效
向闭环MIMO系统中的发射机站提供CQI反馈
- 专利标题: PROVIDING CQI FEEDBACK TO A TRANSMITTER STATION IN A CLOSED-LOOP MIMO SYSTEM
- 专利标题(中): 向闭环MIMO系统中的发射机站提供CQI反馈
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申请号: US11617549申请日: 2006-12-28
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公开(公告)号: US20070253386A1公开(公告)日: 2007-11-01
- 发明人: Qinghua Li , Guangjie Li , Xintian E. Lin , Minnie Ho
- 申请人: Qinghua Li , Guangjie Li , Xintian E. Lin , Minnie Ho
- 主分类号: H04Q7/24
- IPC分类号: H04Q7/24
摘要:
Methods and apparatuses for reducing an amount of bandwidth required for feedback to a transmitter station in a closed-loop multiple-input multiple-output (MIMO) system are described herein. The methods may include initially measuring at a receiver station channel qualities associated with receiving signals from a transmitter station for a first and a second spatial channel, the transmitter and receiver stations employing a closed-loop MIMO system. The receiver station may then determine a first and a second channel quality indicator (CQI) based on the measured channel qualities and may then transmit to the transmitter station the first and the second CQI to directly and indirectly identify a first and a second modulation coding scheme (MCS) entry among a plurality of ordered MCS entries, respectively. The second MCS entry being one of a selected subset of lower ordered MCS entries relative to the first MCS entry. The transmitter station may selectively use the first and the second identified MCS to transmit signals to the receiver station over the first and the second spatial channel, respectively.
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