公开(公告)号：US20110164510A1

公开(公告)日：2011-07-07

申请号：US12652124

申请日：2010-01-05

申请人： Jun Zheng ,  Mark Kent ,  Vinko Erceg

发明人： Jun Zheng ,  Mark Kent ,  Vinko Erceg

IPC分类号： H04B15/00 ,  H04L12/26 ,  H04W4/00

CPC分类号： H04B7/0626 ,  H04W72/0406 ,  H04W72/08 ,  H04W72/121

摘要： A mobile device estimates channel status information (CSI) for an associated single user downlink multiple-input multiple-output (MIMO) channel. The estimated CSI is quantized using a finite quantization resolution. The quantized CSI is communicated to the base station over a finite-rate feedback channel. Intended downlink data transmission is scheduled by the base station according to the transmitted CSI, and received by the mobile device, accordingly. The estimated CSI comprise generalized channel quality information such as channel capacity and channel direction. The base station selects a first user having a strongest channel capacity according to quantized CSI received from associated mobile devices. Beams orthogonal to a single user downlink MIMO channel of the selected first user are broadcasted. Quantized relative channel direction matrices and projected channel capacity are received from remaining mobile devices. A user having a strongest projected channel capacity is selected a second user for the user group.

摘要翻译： 移动设备估计用于相关联的单用户下行链路多输入多输出（MIMO）信道的信道状态信息（CSI）。 使用有限量化分辨率对估计的CSI进行量化。 量化的CSI通过有限速率反馈信道传送到基站。 相应地，预定的下行链路数据传输由基站根据发送的CSI调度并由移动设备接收。 估计的CSI包括广播信道质量信息，例如信道容量和信道方向。 基站根据从相关联的移动设备接收到的量化CSI来选择具有最强信道容量的第一用户。 广播与所选择的第一用户的单个用户下行链路MIMO信道正交的光束。 从剩余的移动设备接收量化的相对信道方向矩阵和投影信道容量。 为用户组选择具有最强投影通道容量的用户的第二用户。

公开(公告)号：US07953138B2

公开(公告)日：2011-05-31

申请号：US12910485

申请日：2010-10-22

申请人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

发明人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

IPC分类号： H04L27/30

CPC分类号： H04L5/143 ,  H04B7/0417 ,  H04B7/0639 ,  H04L25/0204 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03808

摘要： A method and system for processing communication signals is provided and may comprise, quantizing a channel estimate at a MIMO receiver onto a codebook based on a cost function, wherein the codebook comprises a plurality of unitary matrices. A codebook index may be fed back from the MIMO receiver to a MIMO transmitter, wherein the codebook index is associated with one of the plurality of unitary matrices that minimizes the cost function. The cost function may be minimized by choosing a smallest scalar cost from a plurality of scalar costs, wherein each one of the scalar costs is generated from one or more sums and one or more products of elements of a product matrix, and wherein the product matrix is generated from one of the plurality of unitary matrices, a matrix comprising the channel estimate, and their respective Hermitian Transposes.

摘要翻译： 提供了一种用于处理通信信号的方法和系统，并且可以包括：基于成本函数将MIMO接收机处的信道估计量化到码本上，其中码本包括多个酉矩阵。 码本索引可以从MIMO接收机反馈到MIMO发射机，其中，码本索引与使成本函数最小化的多个酉矩阵中的一个相关联。 可以通过从多个标量成本中选择最小标量成本来最小化成本函数，其中每个标量成本是从产品矩阵的一个或多个和的乘积和一个或多个乘积的乘积产生的，并且其中产品矩阵 从多个酉矩阵中的一个生成矩阵，包括信道估计的矩阵以及它们各自的厄米转移。

公开(公告)号：US07822102B2

公开(公告)日：2010-10-26

申请号：US11767158

申请日：2007-06-22

申请人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

发明人： Mark Kent ,  Vinko Erceg ,  Jun Zheng

IPC分类号： H04L27/30

CPC分类号： H04B7/0417 ,  G06Q30/0283 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0854

摘要： Aspects of a method and system for an efficient channel quantization method or MIMO pre-coding systems may include quantizing channel state information in a MIMO pre-coding system onto a codebook, which comprises one or more unitary matrices, using a cost function; selecting a quantization function that enables the quantizing based on a number of receive antennas and a number of transmit antennas associated with the MIMO pre-coding system; and selecting the cost function from a set of cost functions based on the number of receive antennas and the number of transmit antennas. The channel state information may be a matrix Ĥ. The set of cost functions may comprise function f(A), which may be defined by the following relationships: f ⁡ ( A ) = ∑ i = 1 N ⁢ ⁢ ∑ j = 1 , j ≠ i N ⁢ ⁢  a i , j  2 ⁢ ⁢ and / or ⁢ ⁢ f ⁡ ( A ) = ∑ i = 1 N ⁢ ⁢ ∑ j = 1 , j ≠ i N ⁢ ⁢  a i , j  2 - ∑ i = 1 N ⁢ ⁢ a i , i where A is a matrix of size N by N and aij is element (i,j) of matrix A.

摘要翻译： 用于有效信道量化方法或MIMO预编码系统的方法和系统的方面可以包括：使用成本函数将MIMO预编码系统中的信道状态信息量化到包括一个或多个酉矩阵的码本上; 选择能够基于多个接收天线进行量化的量化函数和与MIMO预编码系统相关联的多个发射天线; 以及基于接收天线的数量和发射天线的数量从一组成本函数中选择成本函数。 信道状态信息可以是矩阵Ĥ。 一组成本函数可以包括函数f（A），其可以由以下关系定义：f⁡（A）=Σi = 1 N笨Σj = 1，j≠i Nüüai，j 庇2⁢or⁡⁡⁡⁡⁡ΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣΣ 其中A是N乘N的矩阵，aij是矩阵A的元素（i，j）。

公开(公告)号：US20080192853A1

公开(公告)日：2008-08-14

申请号：US11847683

申请日：2007-08-30

申请人： Mark Kent ,  Vinko Erceg ,  Jun Zheng ,  Uri Landau

发明人： Mark Kent ,  Vinko Erceg ,  Jun Zheng ,  Uri Landau

IPC分类号： H04L5/12

CPC分类号： H04L25/03343 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0248 ,  H04L2025/03426 ,  H04L2025/03808

摘要： Aspects of a method and system for a delta quantizer for rate reduction pre-coding matrices may include quantizing a change in channel state information in a MIMO pre-coding system onto a codebook and generating a pre-coding matrix based on at least the channel state information. The channel state information may be a matrix V and one or more associated singular values. The matrix V may be generated using Singular Value Decomposition (SVD) or Geometric Mean Decomposition (GMD). One or more columns of the matrix V may be selected based on the one or more associated singular values and may be combined to enable the generation of the pre-coding matrix. The codebook may comprise one or more unitary matrices. An index of an element of the codebook, onto which the change in channel state information is quantized, may be transmitted from a receiver to a transmitter.

摘要翻译： 用于速率降低预编码矩阵的delta量化器的方法和系统的方面可以包括将MIMO预编码系统中的信道状态信息的变化量化到码本上，并且至少基于信道状态生成预编码矩阵 信息。 信道状态信息可以是矩阵V和一个或多个相关联的奇异值。 矩阵V可以使用奇异值分解（SVD）或几何平均分解（GMD）来生成。 可以基于一个或多个相关联的奇异值来选择矩阵V的一个或多个列，并且可以组合以使得能够生成预编码矩阵。 码本可以包括一个或多个酉矩阵。 信道状态信息的变化被量化的码本的元素的索引可以从接收器发送到发送器。

公开(公告)号：US20080192717A1

公开(公告)日：2008-08-14

申请号：US11847669

申请日：2007-08-30

申请人： Mark Kent ,  Vinko Erceg ,  Jun Zheng ,  Uri Landau

发明人： Mark Kent ,  Vinko Erceg ,  Jun Zheng ,  Uri Landau

IPC分类号： H04B7/216

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0641

摘要： Aspects of a method and system for an alternating delta quantizer for limited feedback MIMO pre-coders may comprise quantizing a change in channel state information in a MIMO pre-coding system onto at least a first and a second codebook, each of which comprises one or more unitary matrices, using a cost function; feeding back, in an alternating manner, an index to an element of at least the first codebook or the second codebook, associated with the quantizing, from a receiver to a transmitter in said MIMO pre-coding system, and generating the at least first and second codebook based on at least the channel state information. The channel state information may be a matrix V and the cost function may be defined by the following relationship: f  ( A ) = ( 1 N  ∑ j = 1 N   a jj  2 ) where A is a matrix of size N by N and aij is element (i,j) of matrix A.

摘要翻译： 用于有限反馈MIMO预编码器的交替式量化器的方法和系统的方面可以包括将MIMO预编码系统中的信道状态信息的改变量化到至少第一和第二码本上，每个代码簿包括一个或 更多的单位矩阵，使用成本函数; 以交替的方式，向所述MIMO预编码系统中的从接收机到发射机的与量化相关联的至少第一码本或第二码本的元素的索引进行反馈，并且生成至少第一和 至少基于信道状态信息的第二码本。 信道状态信息可以是矩阵V，并且成本函数可以由以下关系定义：