发明名称 |
Base station apparatus and transmission method |
摘要 |
The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal. |
申请公布号 |
US8995557(B2) |
申请公布日期 |
2015.03.31 |
申请号 |
US201414316634 |
申请日期 |
2014.06.26 |
申请人 |
Panasonic Intellectual Property Corporation of America |
发明人 |
Tong Hui;Hoshino Masayuki;Xu Ming;Nakao Seigo;Imamura Daichi |
分类号 |
H04B7/02;H04B7/04;H04B7/06;H04L25/03 |
主分类号 |
H04B7/02 |
代理机构 |
Seed IP Law Group PLLC |
代理人 |
Seed IP Law Group PLLC |
主权项 |
1. A base station apparatus comprising:
a codebook storing section configured to store an extended codebook which is generated by combining a first basic codebook and a second basic codebook along the column direction, wherein the first basic codebook includes N groups, each consisting of four basic pre-coding matrices that are orthogonal to each other (N is a natural number equal to or larger than 2), and wherein the second basic codebook is generated by applying phase offsets to the N groups respectively, each of the phase offsets applied to the N groups being different from each other; a receiving section configured to receive information including an index (a pre-coding matrix indicator (PMI)) for identifying one pre-coding matrix from among the 4N pre-coding matrices included in the extended codebook, from a terminal apparatus; and a transmitting section configured to pre-code data using a pre-coding matrix corresponding to the PMI included in the received information and to transmit the pre-coded data to the terminal apparatus. |
地址 |
Torrance CA US |