公开(公告)号：US20130156001A1

公开(公告)日：2013-06-20

申请号：US13719241

申请日：2012-12-19

Applicant: Marvell World Trade Ltd.

Inventor： Krishna Srikanth Gomadam

IPC: H04W72/04

CPC classification number: H04W72/0406 ,  H04B7/024 ,  H04B7/0626 ,  H04L25/03955

Abstract: A method includes controlling a set of transmission points, which are configured to operate in accordance with a Coordinated Multipoint (CoMP) transmission scheme, to simultaneously transmit a composite Reference Signal (RS) to a mobile communication terminal. Feedback, which is indicative of a response of a composite communication channel between the transmission points and the terminal, is received from the terminal. The feedback is estimated in the terminal based on the composite RS received in the terminal from the transmission points. Subsequent transmission from the transmission points is configured based on the received feedback.

Abstract translation: 一种方法包括控制一组发送点，其被配置为根据协调多点（CoMP）传输方案进行操作，以同时向移动通信终端发送复合参考信号（RS）。 从终端接收表示发送点和终端之间的复合通信信道的响应的反馈。 基于在终端中从传输点接收的复合RS估计终端中的反馈。 基于所接收的反馈来配置从发送点的后续发送。

公开(公告)号：US20130114655A1

公开(公告)日：2013-05-09

申请号：US13669477

申请日：2012-11-06

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Krishna Srikanth Gomadam

IPC: H04B1/38

CPC classification number: H04B1/38 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0632 ,  H04B7/0641 ,  H04B7/066 ,  H04L1/0029 ,  H04L1/0031 ,  H04L5/0057

Abstract: A method includes, in a mobile communication terminal, holding a definition of a sub-sampled codebook identifying precoding matrices, which are selected from a master codebook that is made-up of a wideband codebook and a frequency-selective codebook. The definition defines a first subset of the wideband codebook and a second subset of the frequency-selective codebook. The second subset of the frequency-selective codebook is represented using no more than two bits. A Multiple-Input Multiple-Output (MIMO) signal is received in the terminal. Based on the received MIMO signal, one or more precoding matrices are selected from the sub-sampled codebook for precoding subsequent MIMO signals transmitted to the terminal, and precoding feedback indicating the selected precoding matrices is calculated. The precoding feedback is transmitted from the terminal.

Abstract translation: 一种方法包括在移动通信终端中保存从由宽带码本和频率选择码本构成的主码本中选择的识别预编码矩阵的子采样码本的定义。 该定义定义了宽带码本的第一子集和频率选择码本的第二子集。 使用不超过两位来表示频率选择码本的第二子集。 在终端中接收多输入多输出（MIMO）信号。 基于接收到的MIMO信号，从子采样码本中选择一个或多个预编码矩阵，用于对发送到终端的后续MIMO信号进行预编码，并且计算指示所选择的预编码矩阵的预编码反馈。 从终端发送预编码反馈。

公开(公告)号：US09615280B2

公开(公告)日：2017-04-04

申请号：US14949429

申请日：2015-11-23

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Krishna Srikanth Gomadam

IPC: H04W4/00 ,  H04W24/08 ,  H04W24/10 ,  H04B7/024 ,  H04L1/00 ,  H04B7/06 ,  H04L1/20 ,  H04W72/08

CPC classification number: H04W24/08 ,  H04B7/024 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/20 ,  H04W24/10 ,  H04W72/08

Abstract: An interference covariance calculation technique is selected at a first communication device, where the interference covariance calculation technique is to be utilized by a second communication device when computing a channel quality indicator (CQI) associated with a communication channel between the first communication device and the second communication device. The interference covariance calculation technique is selected from a set of multiple techniques for calculating interference covariance. The first communication device transmits an indication of the selected interference covariance calculation technique to the second communication device. The first communication device receives a CQI calculated by the second communication device in accordance with the selected interference covariance calculation technique.

公开(公告)号：US09337985B2

公开(公告)日：2016-05-10

申请号：US14697673

申请日：2015-04-28

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Yan Zhang ,  Krishna Srikanth Gomadam

IPC: H04B7/00 ,  H04B1/00 ,  H04B7/02 ,  H04B17/00 ,  H04W4/00 ,  H04L5/00 ,  H04W24/02

CPC classification number: H04L5/0057 ,  H04L1/0029 ,  H04L5/0035 ,  H04W24/02 ,  H04W28/06

Abstract: A method includes receiving in a mobile communication terminal signals from multiple cells that coordinate transmission of the signals with one another in a Cooperative Multipoint (CoMP) scheme. At least first and second Channel Quality Indicators (CQIs), for respective communication channels over which the signals are received, are calculated in the terminal based on the received signals. The second CQI is differentially encoded relative to the first CQI. Feedback information, including the first CQI and the differentially-encoded second CQI, is transmitted from the terminal.

Abstract translation: 一种方法包括：在协作多点（CoMP）方案中，在移动通信终端中接收来自多个小区的信号，以协调信号彼此的传输。 至少第一和第二信道质量指示符（CQI），对于在其上接收信号的各个通信信道，在终端中基于所接收的信号来计算。 第二CQI相对于第一CQI进行差分编码。 从终端发送包括第一CQI和差分编码的第二CQI的反馈信息。

公开(公告)号：US08923455B2

公开(公告)日：2014-12-30

申请号：US13669481

申请日：2012-11-06

Applicant: Marvell World Trade Ltd.

Inventor： Krishna Srikanth Gomadam ,  Adoram Erell ,  Daniel Yellin

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04B17/00 ,  H04W24/10

CPC classification number: H04W24/10 ,  H04B17/24

Abstract: A method includes, in a mobile communication terminal, receiving from at least first and second base stations, which cooperate in a coordinated transmission scheme, signals that are transmitted over respective first and second communication channels. Respective channel measures are calculated for the communication channels based on the received signals. First and second feedback data, which are indicative of the respective channel measures of the first and second communication channels, are formulated such that the first feedback data has a first data size and the second feedback data has a second data size, different from the first data size. The first and second feedback data are transmitted from the mobile communication terminal to at least one of the base stations.

Abstract translation: 一种方法包括在移动通信终端中，从协调传输方案中协作的至少第一和第二基站接收在各个第一和第二通信信道上发送的信号。 基于接收到的信号，为通信信道计算各个信道量度。 表示第一和第二通信信道的相应信道测量值的第一和第二反馈数据被配置为使得第一反馈数据具有第一数据大小，并且第二反馈数据具有与第一数据大小不同的第二数据大小 数据大小。 第一和第二反馈数据从移动通信终端发送到至少一个基站。

公开(公告)号：US20140286452A1

公开(公告)日：2014-09-25

申请号：US14296474

申请日：2014-06-05

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Krishna Srikanth Gomadam ,  Adoram Erell

IPC: H04B7/04

CPC classification number: H04B7/0478 ,  H04B7/0417 ,  H04B7/0486 ,  H04B7/0639 ,  H04B7/065 ,  H04L1/0618

Abstract: A method in a mobile communication terminal includes holding a definition of a sub-sampled codebook identifying precoding matrices to be used for providing precoding feedback by the terminal The precoding matrices in the sub-sampled codebook are selected from a master codebook that is made-up of a long-term sub-codebook and a short-term sub-codebook. The definition defines a first subset of the long-term sub-codebook and a second subset of the short-term sub-codebook. A Multiple-Input Multiple-Output (MIMO) signal is received in the terminal via multiple receive antennas. Based on the received MIMO signal, a precoding matrix is selected from the sub-sampled codebook for precoding subsequent MIMO signals transmitted to the terminal. The precoding feedback indicating the selected precoding matrix is calculated.

Abstract translation: 移动通信终端中的方法包括保存用于识别由终端提供预编码反馈的预编码矩阵的子采样码本的定义。子采样码本中的预编码矩阵从组成的主码本中选择 的长期子码本和短期子码本。 该定义定义了长期子码本的第一子集和短期子码本的第二子集。 通过多个接收天线在终端中接收多输入多输出（MIMO）信号。 基于接收到的MIMO信号，从子采样码本中选择预编码矩阵，用于对发送到终端的后续MIMO信号进行预编码。 计算指示所选择的预编码矩阵的预编码反馈。

公开(公告)号：US20140003266A1

公开(公告)日：2014-01-02

申请号：US13897144

申请日：2013-05-17

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Krishna Srikanth Gomadam

IPC: H04W24/10

CPC classification number: H04W24/08 ,  H04B7/024 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/20 ,  H04W24/10 ,  H04W72/08

Abstract: An interference covariance calculation technique is selected at a first communication device, where the interference covariance calculation technique is to be utilized by a second communication device when computing a channel quality indicator (CQI) associated with a communication channel between the first communication device and the second communication device. The interference covariance calculation technique is selected from a set of multiple techniques for calculating interference covariance. The first communication device transmits an indication of the selected interference covariance calculation technique to the second communication device. The first communication device receives a CQI calculated by the second communication device in accordance with the selected interference covariance calculation technique.

Abstract translation: 在第一通信设备处选择干扰协方差计算技术，其中当计算与第一通信设备和第二通信设备之间的通信信道相关联的信道质量指示符（CQI）时，由第二通信设备利用干扰协方差计算技术 通讯装置 从一组用于计算干涉协方差的技术中选出干涉协方差计算技术。 第一通信设备向第二通信设备发送所选择的干扰协方差计算技术的指示。 第一通信装置根据所选择的干涉协方差计算技术接收由第二通信装置计算出的CQI。

公开(公告)号：US20130266100A1

公开(公告)日：2013-10-10

申请号：US13852576

申请日：2013-03-28

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Krishna Srikanth Gomadam ,  Yakun Sun ,  Raphael Cendrillon ,  Hui-Ling Lou

IPC: H04L25/02

CPC classification number: H04L25/0242 ,  H04L5/0023 ,  H04L25/0228 ,  H04L25/03159

Abstract: Systems and methods for estimating characteristics of a channel are provided. A transmission of known reference data is received at a receiving device. The reference data is transmitted over the channel that includes one or more desired layers and one or more interfering layers. Characteristics of the channel are determined based on the known reference data, where the determining includes a joint estimation of the one or more desired layers and the one or more interfering layers. The determining includes selecting certain of the layers to be estimated at each of the known reference data and selecting certain of the layers to be estimated over a range of the known reference data. The determining includes solving an equation to jointly estimate the one or more desired layers and the one or more interfering layers based on the selections. The selections reduce a number of unknown values in the equation.

Abstract translation: 提供了用于估计通道特性的系统和方法。 在接收设备处接收已知参考数据的传输。 参考数据在包括一个或多个所需层和一个或多个干扰层的信道上传输。 基于已知参考数据确定信道的特征，其中确定包括一个或多个所需层和一个或多个干扰层的联合估计。 确定包括在每个已知参考数据处选择要估计的某些层，并且在已知参考数据的范围上选择待估计的某些层。 确定包括求解方程式以基于选择共同估计一个或多个所需层和一个或多个干扰层。 选择减少了方程中的一些未知值。

公开(公告)号：US20160080957A1

公开(公告)日：2016-03-17

申请号：US14949429

申请日：2015-11-23

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Krishna Srikanth Gomadam

IPC: H04W24/08 ,  H04W72/08

CPC classification number: H04W24/08 ,  H04B7/024 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/20 ,  H04W24/10 ,  H04W72/08

Abstract: An interference covariance calculation technique is selected at a first communication device, where the interference covariance calculation technique is to be utilized by a second communication device when computing a channel quality indicator (CQI) associated with a communication channel between the first communication device and the second communication device. The interference covariance calculation technique is selected from a set of multiple techniques for calculating interference covariance. The first communication device transmits an indication of the selected interference covariance calculation technique to the second communication device. The first communication device receives a CQI calculated by the second communication device in accordance with the selected interference covariance calculation technique.

Abstract translation: 在第一通信设备处选择干扰协方差计算技术，其中当计算与第一通信设备和第二通信设备之间的通信信道相关联的信道质量指示符（CQI）时，由第二通信设备利用干扰协方差计算技术 通讯装置 从一组用于计算干涉协方差的技术中选出干涉协方差计算技术。 第一通信设备向第二通信设备发送所选择的干扰协方差计算技术的指示。 第一通信装置根据所选择的干涉协方差计算技术接收由第二通信装置计算出的CQI。

公开(公告)号：US09178591B2

公开(公告)日：2015-11-03

申请号：US14296474

申请日：2014-06-05

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Krishna Srikanth Gomadam ,  Adoram Erell

IPC: H04L1/02 ,  H04B7/04 ,  H04B7/06 ,  H04L1/06

CPC classification number: H04B7/0478 ,  H04B7/0417 ,  H04B7/0486 ,  H04B7/0639 ,  H04B7/065 ,  H04L1/0618

Abstract: A method in a mobile communication terminal includes holding a definition of a sub-sampled codebook identifying precoding matrices to be used for providing precoding feedback by the terminal. The precoding matrices in the sub-sampled codebook are selected from a master codebook that is made-up of a long-term sub-codebook and a short-term sub-codebook. The definition defines a first subset of the long-term sub-codebook and a second subset of the short-term sub-codebook. A Multiple-Input Multiple-Output (MIMO) signal is received in the terminal via multiple receive antennas. Based on the received MIMO signal, a precoding matrix is selected from the sub-sampled codebook for precoding subsequent MIMO signals transmitted to the terminal. The precoding feedback indicating the selected precoding matrix is calculated.

Abstract translation: 移动通信终端中的方法包括保存用于提供终端提供预编码反馈的预编码矩阵的子采样码本的定义。 子采样码本中的预编码矩阵从由长期子码本和短期子码本构成的主码本中选择。 该定义定义了长期子码本的第一子集和短期子码本的第二子集。 通过多个接收天线在终端中接收多输入多输出（MIMO）信号。 基于接收到的MIMO信号，从子采样码本中选择预编码矩阵，用于对发送到终端的后续MIMO信号进行预编码。 计算指示所选择的预编码矩阵的预编码反馈。