发明名称 |
Precoding with a codebook for a wireless system |
摘要 |
A method of precoding implemented in a base station used in a wireless communications system having codebooks for multiple transmission ranks is disclosed. The method includes precoding data in one or more layers with a precoding matrix obtained from one of the codebooks, and transmitting the precoded data to a user equipment, wherein entries of said one of the codebooks are accessed through a first description and a second description, wherein the precoding matrix is determined according to the first description and the second description, which are unique to the precoding matrix, and wherein the second description provides a finer description of said one of the codebooks than the first description. Other methods, systems, and apparatuses also are disclosed. |
申请公布号 |
US9071301(B2) |
申请公布日期 |
2015.06.30 |
申请号 |
US201313952160 |
申请日期 |
2013.07.26 |
申请人 |
NEC Laboratories America, Inc. |
发明人 |
Khojastepour Mohammad Ali |
分类号 |
H04W16/28;H04B7/04;H04W52/42 |
主分类号 |
H04W16/28 |
代理机构 |
|
代理人 |
Kimura Akitaka;Kolodka Joseph |
主权项 |
1. A method of precoding implemented in a base station used in a wireless communications system with multiple transmission ranks, the method comprising:
having a codebook for each transmission rank; precoding data with a precoding matrix obtained from the codebook; and transmitting the precoded data to a user equipment, wherein entries of one or more of the codebooks are accessed through a first description and a second description, wherein the precoding matrix is determined according to the first description and the second description, which are unique to the precoding matrix, and wherein the second description provides a finer description of the codebook than the first description. |
地址 |
Princeton NJ US |