公开(公告)号：US09450657B2

公开(公告)日：2016-09-20

申请号：US14465053

申请日：2014-08-21

Applicant: NEC Laboratories America, Inc.

Inventor： Guosen Yue ,  Narayan Prasad ,  Sampath Rangarajan ,  Samet Oymak

IPC: H04L1/06 ,  H04L5/00 ,  H04W72/04 ,  H04B7/04

CPC classification number: H04B7/0465 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/0452 ,  H04B7/0469 ,  H04B7/0617 ,  H04L5/0037 ,  H04W52/367 ,  H04W52/42

Abstract: A method and system are provided. The method includes providing transmit precoders for a multiple-input and multiple-output communication system having a plurality of transmit antennas. The plurality of transmit antennas are for forming, using precoding, a plurality of channels such that each of the plurality of channels are configurable to serve a respective one of a plurality of users. The providing step includes imposing a respective average transmit antenna power constraint on each of the plurality of transmit antennas. The providing step further includes determining a diagonal precoder responsive to applying column scaling to a downlink channel matrix having a plurality of rows and a plurality of columns. The providing step additionally includes generating, from the diagonal precoder, a weighted precoder in accordance with the respective average antenna power constraint by optimizing a weighted sum-rate obtained upon transmitting respective signals over the plurality of channels.

Abstract translation: 提供了一种方法和系统。 该方法包括为具有多个发射天线的多输入和多输出通信系统提供发射预编码器。 多个发射天线用于使用预编码形成多个信道，使得多个信道中的每一个可配置为服务于多个用户中的相应一个。 提供步骤包括在多个发射天线中的每一个上施加相应的平均发射天线功率约束。 所述提供步骤还包括：响应于对具有多个行和多个列的下行链路信道矩阵应用列缩放来确定对角预编码器。 提供步骤还包括从对角线预编码器根据相应的平均天线功率约束，通过优化通过多个信道发送各个信号而获得的加权和频率来生成加权预编码器。

公开(公告)号：US20150063254A1

公开(公告)日：2015-03-05

申请号：US14465053

申请日：2014-08-21

Applicant: NEC Laboratories America, Inc.

Inventor： Guosen Yue ,  Narayan Prasad ,  Sampath Rangarajan ,  Samet Oymak

IPC: H04B7/04 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04B7/0465 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/0452 ,  H04B7/0469 ,  H04B7/0617 ,  H04L5/0037 ,  H04W52/367 ,  H04W52/42

Abstract: A method and system are provided. The method includes providing transmit precoders for a multiple-input and multiple-output communication system having a plurality of transmit antennas. The plurality of transmit antennas are for forming, using precoding, a plurality of channels such that each of the plurality of channels are configurable to serve a respective one of a plurality of users. The providing step includes imposing a respective average transmit antenna power constraint on each of the plurality of transmit antennas. The providing step further includes determining a diagonal precoder responsive to applying column scaling to a downlink channel matrix having a plurality of rows and a plurality of columns. The providing step additionally includes generating, from the diagonal precoder, a weighted precoder in accordance with the respective average antenna power constraint by optimizing a weighted sum-rate obtained upon transmitting respective signals over the plurality of channels.

Abstract translation: 提供了一种方法和系统。 该方法包括为具有多个发射天线的多输入和多输出通信系统提供发射预编码器。 多个发射天线用于使用预编码形成多个信道，使得多个信道中的每一个可配置为服务于多个用户中的相应一个。 提供步骤包括在多个发射天线中的每一个上施加相应的平均发射天线功率约束。 所述提供步骤还包括：响应于对具有多个行和多个列的下行链路信道矩阵应用列缩放来确定对角预编码器。 提供步骤还包括从对角线预编码器根据相应的平均天线功率约束，通过优化通过多个信道发送各个信号而获得的加权和频率来生成加权预编码器。