公开(公告)号：US20150333807A1

公开(公告)日：2015-11-19

申请号：US14435537

申请日：2013-10-09

Applicant: KYOCERA CORPORATION

Inventor： Takahiro SAIWAI ,  Chiharu YAMAZAKI ,  Kugo MORITA ,  Fangwei TONG ,  Atsuhisa INAKOSHI ,  Masato FUJISHIRO

IPC: H04B7/04 ,  H04W74/00 ,  H04W72/10 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0639 ,  H04L5/00 ,  H04L5/0023 ,  H04L5/0057 ,  H04W24/10 ,  H04W72/10 ,  H04W72/1226 ,  H04W74/006

Abstract: A mobile communication system performs downlink multi-antenna transmission by applying a precoder matrix that defines transmission directionality of downlink and a rank that defines number of signal sequences of the downlink. The mobile communication system comprises a user terminal that feeds back feedback information of a target frequency band, to a base station. The feedback information includes combinations of precoder matrix information indicating the precoder matrix and rank information indicating the rank.

Abstract translation: 移动通信系统通过应用定义下行链路的传输方向性的预编码矩阵和定义下行链路的信号序列数量的秩来执行下行链路多天线传输。 移动通信系统包括将目标频带的反馈信息反馈给基站的用户终端。 反馈信息包括指示预编码器矩阵的预编码器矩阵信息和指示等级的等级信息的组合。