发明名称 |
Method and apparatus for feeding back channel state information |
摘要 |
A method of a user equipment feeling channel state information in a wireless communication system including receiving a reference signal from a base station; generating first channel state information by measuring the reference signal; generating second channel state information based on the first channel state information; and transmitting the first channel state information and the second channel state information to the base station. The first channel state information is channel state information of a single user single cell Multi-input Multi-Output (MIMO) mode, and the second channel state information is channel state information of a multi-user MIMO (MU-MIMO) mode or a Cooperative Multiple Points Transmission and Reception (CoMP) mode. |
申请公布号 |
US8774037(B2) |
申请公布日期 |
2014.07.08 |
申请号 |
US201013319445 |
申请日期 |
2010.06.17 |
申请人 |
LG Electronics Inc. |
发明人 |
Kim Hyung Tae;Seo Han Byul;Kim Ki Jun |
分类号 |
H04L12/26 |
主分类号 |
H04L12/26 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. A method of a user equipment feeding back channel state information in a wireless communication system, the method comprising:
receiving a reference signal from a base station; generating first channel state information by measuring the reference signal; generating second channel state information based on the first channel state information; and transmitting the first channel state information and the second channel state information to the base station, wherein the first channel state information is channel state information of a single user single cell Multi-input Multi-Output (MIMO) mode, and the second channel state information is channel state information of a multi-user MIMO (MU-MIMO) mode or a Cooperative Multiple Points Transmission and Reception (COMP) mode, wherein each of the first channel state information and the second channel state information includes a Channel Quality Indication (CQI), a Precoding Matrix Index (PMI), and a Rank Indicator (RI), and wherein the first channel state information includes a first PMI indicative of a first precoding matrix, the second channel state information includes a second PMI indicative of a second precoding matrix, and the second precoding matrix includes some of or all column vectors of the first precoding matrix. |
地址 |
Seoul KR |