公开(公告)号：US10205621B2

公开(公告)日：2019-02-12

申请号：US14813920

申请日：2015-07-30

Applicant: NTT DoCoMo, Inc.

Inventor： Chunlin Yan ,  Anass Benjebbour ,  Yang Lan ,  Anxin Li ,  Huiling Jiang

IPC: H04L27/34 ,  H04L5/00 ,  H04W72/04

Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.

公开(公告)号：US20190044591A1

公开(公告)日：2019-02-07

申请号：US16073979

申请日：2017-02-01

Applicant: NTT DOCOMO, INC.

Inventor： Yousuke Sano ,  Kazuaki Takeda ,  Satoshi Nagata ,  Chunlin Yan ,  Anxin Li ,  Huiling Jiang

IPC: H04B7/0456

Abstract: A base station used in a radio communication system includes a precoding matrix calculating unit that calculates a precoding matrix based on a first precoding matrix reported from a first user equipment in a pair selected as a target of multiplexing in a power region and a second precoding matrix reported from a second user equipment in the pair and a precoding unit that applies a precoding to transmission signals to the first user equipment and the second user equipment using the precoding matrix calculated by the precoding matrix calculating unit.