公开(公告)号：US20090296585A1

公开(公告)日：2009-12-03

申请号：US12226677

申请日：2006-04-27

申请人： Bruno Melis ,  Alfredo Ruscitto ,  Pietro Di Paola

发明人： Bruno Melis ,  Alfredo Ruscitto ,  Pietro Di Paola

IPC分类号： H04L12/26 ,  H04L27/28

CPC分类号： H04L25/022 ,  H04L25/0206 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0258 ,  H04L25/03159 ,  H04L25/03292 ,  H04L25/03305 ,  H04L27/2613 ,  H04L27/262 ,  H04L2025/03414

摘要： A channel estimator for use in a receiver node receiving signals from a plurality of user terminals wherein each user terminal is allotted a respective set of transmission subcarriers and respective test signal sequences for transmission over the channel to be estimated. The channel estimator has stored therein information as to the respective sets of transmission subcarriers allotted to the user terminals for transmission as well as the discrete spectra of the respective test signal sequences allotted to the user terminals. Upon receiving from a plurality of user terminals signals including the respective test signal sequences transmitted over the channel by using the respective sets of transmission subcarriers allotted thereto, the estimator generates the discrete spectrum of the combined test signal received and performs channel estimation as a function of the discrete spectrum of the combined test signal and the discrete spectra of the test signal sequences allotted to the user terminals. A frequency domain channel estimation is performed for a single carrier frequency division multiple access system.

摘要翻译： 一种用于接收来自多个用户终端的信号的接收机节点的信道估计器，其中每个用户终端分配相应的一组发射子载波和各个测试信号序列，以便在待估计的信道上传输。 信道估计器在其中存储关于分配给用户终端进行传输的各组发送子载波的信息以及分配给用户终端的各个测试信号序列的离散频谱。 在从多个用户终端接收包括通过使用分配给它们的各组发送子载波的通过信道发送的各个测试信号序列的信号时，估计器产生接收的组合测试信号的离散频谱，并且执行信道估计作为 组合测试信号的离散频谱和分配给用户终端的测试信号序列的离散频谱。 对单载波频分多址系统进行频域信道估计。

公开(公告)号：US07848356B2

公开(公告)日：2010-12-07

申请号：US12226677

申请日：2006-04-27

申请人： Bruno Melis ,  Alfredo Ruscitto ,  Pietro Di Paola

发明人： Bruno Melis ,  Alfredo Ruscitto ,  Pietro Di Paola

IPC分类号： H04J1/00

CPC分类号： H04L25/022 ,  H04L25/0206 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0258 ,  H04L25/03159 ,  H04L25/03292 ,  H04L25/03305 ,  H04L27/2613 ,  H04L27/262 ,  H04L2025/03414

摘要： A channel estimator for use in a receiver node receiving signals from a plurality of user terminals wherein each user terminal is allotted a respective set of transmission subcarriers and respective test signal sequences for transmission over the channel to be estimated. The channel estimator has stored therein information as to the respective sets of transmission subcarriers allotted to the user terminals for transmission as well as the discrete spectra of the respective test signal sequences allotted to the user terminals. Upon receiving from a plurality of user terminals signals including the respective test signal sequences transmitted over the channel by using the respective sets of transmission subcarriers allotted thereto, the estimator generates the discrete spectrum of the combined test signal received and performs channel estimation as a function of the discrete spectrum of the combined test signal and the discrete spectra of the test signal sequences allotted to the user terminals. A frequency domain channel estimation is performed for a single carrier frequency division multiple access system.

摘要翻译： 一种用于接收来自多个用户终端的信号的接收机节点的信道估计器，其中每个用户终端分配相应的一组发射子载波和各个测试信号序列，以便在待估计的信道上传输。 信道估计器在其中存储关于分配给用户终端进行传输的各组发送子载波的信息以及分配给用户终端的各个测试信号序列的离散频谱。 在从多个用户终端接收包括通过使用分配给它们的各组发送子载波的通过信道发送的各个测试信号序列的信号时，估计器产生接收的组合测试信号的离散频谱，并且执行信道估计作为 组合测试信号的离散频谱和分配给用户终端的测试信号序列的离散频谱。 对单载波频分多址系统进行频域信道估计。

公开(公告)号：US20110158180A1

公开(公告)日：2011-06-30

申请号：US13062184

申请日：2008-09-04

申请人： Bruno Melis ,  Rosalba Campanale ,  Alfredo Ruscitto ,  Federica Caldara

发明人： Bruno Melis ,  Rosalba Campanale ,  Alfredo Ruscitto ,  Federica Caldara

IPC分类号： H04L27/06 ,  H04W4/00

CPC分类号： H04B7/0845 ,  H04B1/71055 ,  H04B1/712

摘要： Signals received from channels exposed to multi-path propagation via a plurality of diversity antennas and including at least one pilot signal are processed by detecting a set of multi-path components for each received signal and computing a set of channel coefficients from multi-path components of the at least one pilot signal in the set of multi-path components. The set of channel coefficients is organized as a channel coefficient vector. From the channel coefficient vector, a set of combining weights is estimated to be applied to the received signals by: computing a spatial correlation matrix of the channel coefficient vector by neglecting the correlations between multi-path components of the channel coefficient vector having different delays, whereby the correlation matrix is a block diagonal matrix including null coefficients other than for non-null sub-matrixes arranged along the diagonal of the correlation matrix, wherein the sub-matrixes have a size equal to the number of diversity antennas; deriving from the spatial correlation matrix a resulting matrix by calculating the inverse of the sub-matrixes or a scaled version thereof; and multiplying the resulting matrix and the channel coefficient vector in order to obtain the desired set of combining weights.

摘要翻译： 通过经由多个分集天线暴露于多路径传播并且包括至少一个导频信号的信道接收到的信号通过检测每个接收信号的多路径分量集合并从多路径分量计算一组信道系数来处理 的多路径分量集合中的至少一个导频信号。 信道系数集合被组织为信道系数向量。 从信道系数向量，通过以下方式估计组合权重集合：通过忽略具有不同延迟的信道系数向量的多径分量之间的相关性来计算信道系数向量的空间相关矩阵， 由此相关矩阵是包括除了相关矩阵的对角线排列的非零子矩阵之外的空系数的块对角矩阵，其中子矩阵的大小等于分集天线的数量; 通过计算子矩阵的逆或其缩放版本从空间相关矩阵导出得到的矩阵; 并乘以所得到的矩阵和信道系数向量，以便获得期望的组合权重集合。

公开(公告)号：US07515670B2

公开(公告)日：2009-04-07

申请号：US10534992

申请日：2002-11-15

申请人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto

发明人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto

IPC分类号： H04L7/00

CPC分类号： H04B1/7085 ,  H04B1/709

摘要： A device for maintaining fine alignment between an incoming spread spectrum signal and a locally generated code in a digital communication receiver comprises: a delay line for storing a plurality of consecutive samples (E-1, E, M, L, L+1) of the incoming spread spectrum signal; three digitally controlled interpolators for determining by interpolation between consecutive samples an interpolated early sample, an interpolated middle sample, and an interpolated late sample; two correlators for calculating an error signal as the difference between the energy of the symbols computed from the interpolated early and late samples; a circuit for generating a control signal for controlling the interpolation phase of the digitally controlled interpolator for the early sample, and a digital non-linear filter, for smoothing the control signal of the interpolator for the early sample, enabling the update operation of the control signal only when the absolute value of the error signal at a time instant n is smaller than the absolute value of the same error signal at a time instant n−1.

摘要翻译： 一种用于在数字通信接收机中保持输入扩频信号与本地生成代码之间精确对准的装置，包括：延迟线，用于存储多个连续样本（E-1，E，M，L，L + 1） 传入的扩频信号; 三个数字控制内插器，用于通过内插的插值早期样本，插值中间样本和内插后期样本之间的插值来确定; 两个相关器，用于计算误差信号作为从插值的早期和晚期样本计算的符号的能量之间的差; 用于生成用于控制用于早期采样的数字控制内插器的内插相位的控制信号的电路和用于平滑用于早期采样的内插器的控制信号的数字非线性滤波器，使得能够进行控制的更新操作 只有当时刻n的误差信号的绝对值小于在时刻n-1的相同误差信号的绝对值时才产生信号。

公开(公告)号：US20090067518A1

公开(公告)日：2009-03-12

申请号：US12087098

申请日：2005-12-28

申请人： Bruno Melis ,  Alfredo Ruscitto ,  Rosalba Campanale

发明人： Bruno Melis ,  Alfredo Ruscitto ,  Rosalba Campanale

IPC分类号： H04L25/02

CPC分类号： H04L25/0232 ,  G06F17/17

摘要： A method for interpolating between a first and a second point includes the steps of calculating a first distance between a first and a second independent value and a second distance between a first and a second dependent value, right shifting the first and the second distances by a predetermined number of bits for obtaining respectively a hold step and a variations step and generating a number of interpolated points, having independent values between the first and the second independent values and corresponding dependent values obtained by alternating hold and variations phases, wherein the hold phase consists of generating a number of points corresponding to the hold step having the same dependent value, and wherein the variations phase consists of varying the dependent value by the variations step until the number of interpolated points has been calculated. The method is particularly suitable for channel estimation in communication systems.

摘要翻译： 用于在第一和第二点之间进行内插的方法包括以下步骤：计算第一和第二独立值之间的第一距离和第一和第二从属值之间的第二距离，右移第一和第二距离乘以 用于获得分别保持步骤和变化步骤并产生多个插值点的预定数量的比特，其具有通过交替保持和变化阶段获得的第一和第二独立值和相应的依赖值之间的独立值，其中保持阶段包括 产生对应于具有相同相关值的保持步骤的点数，并且其中所述变化阶段包括通过所述变化步骤改变所述依赖值，直到已经计算出内插点数。 该方法特别适用于通信系统中的信道估计。

公开(公告)号：US07450663B2

公开(公告)日：2008-11-11

申请号：US10508928

申请日：2003-03-17

申请人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto ,  Stefano Valle ,  Lorena Simoni

发明人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto ,  Stefano Valle ,  Lorena Simoni

IPC分类号： H04B1/06 ,  H04L5/02

CPC分类号： H04L25/0232

摘要： A method for the estimation of the transfer function of a transmission channel in a receiving system of UMTS type envisages the computation of a plurality of channel coefficients, included among known channel coefficients corresponding to pilot symbols, through the reiteration of an interpolation algorithm, capable of calculating an intermediate point (Z, f(Z)) between a first extreme and a second extreme of a determined interval, the first extreme being formed by at least two known points and the second extreme being formed by at least one known point, the intermediate point to be calculated having as abscissa (Z) the abscissa value of the mean point between the points defining the interval rounded off to the integer closest to the first extreme, and having as ordinate (F(Z)) the arithmetic average between the ordinate of the known point of the second extreme and the ordinate of a point, chosen between the two known points of the first extreme, having a distance from the intermediate point equal to the distance between the intermediate point and the known point of the second extreme.

摘要翻译： 用于估计UMTS类型的接收系统中的传输信道的传递函数的方法设想通过重复插值算法来计算包括在与导频符号相对应的已知信道系数之中的多个信道系数，能够 计算确定间隔的第一极限和第二极限之间的中间点（Z，f（Z）），所述第一极值由至少两个已知点形成，所述第二极值由至少一个已知点形成， 要计算的中间点具有横坐标（Z），将定义间隔的间隔的平均点的横坐标值舍入到最接近第一极限的整数，并且具有纵坐标（F（Z））之间的算术平均值 在第二极端的已知点的纵坐标和在第一极端的两个已知点之间选择的点的纵坐标具有与中间物的距离 点等于中间点与第二极限的已知点之间的距离。

公开(公告)号：US20070189362A1

公开(公告)日：2007-08-16

申请号：US10592689

申请日：2004-03-24

申请人： Valeria D'Amico ,  Bruno Melis ,  Alfredo Ruscitto

发明人： Valeria D'Amico ,  Bruno Melis ,  Alfredo Ruscitto

IPC分类号： H04B1/00

CPC分类号： H04L25/0232 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0857 ,  H04L25/0238 ,  H04W52/42

摘要： A system for performing channel estimation based on a received signal including both known and unknown transmitted symbols, includes detector circuitry for detecting the unknown symbols by assigning estimated values to the unknown symbols, and channel estimator circuitry for performing channel estimation by exploiting both the known symbols and the estimated values assigned to the unknown symbols. The system has associated multiple receiving antennas. The system is preferably included in a CDMA receiver and the received signal includes known pilot bits and additional symbols, such as, transmit power-control commands, feedback information for transmitting antenna diversity, and a transport-format combination indicator that include the unknown symbols.

摘要翻译： 用于基于包括已知和未知传输符号的接收信号执行信道估计的系统包括检测器电路，用于通过将估计值分配给未知符号来检测未知符号，以及信道估计器电路，用于通过利用已知符号 以及分配给未知符号的估计值。 该系统已经连接了多个接收天线。 该系统优选地包括在CDMA接收机中，并且接收的信号包括已知的导频位和附加符号，例如发射功率控制命令，用于发射天线分集的反馈信息，以及包括未知符号的传输格式组合指示符。

公开(公告)号：US09960821B2

公开(公告)日：2018-05-01

申请号：US13142568

申请日：2008-12-30

申请人： Mauro Boldi ,  Paolo Gianola ,  Bruno Melis ,  Alfredo Ruscitto

发明人： Mauro Boldi ,  Paolo Gianola ,  Bruno Melis ,  Alfredo Ruscitto

IPC分类号： H04B7/02 ,  H04B7/022 ,  H04B7/026 ,  H04B7/06

CPC分类号： H04B7/022 ,  H04B7/026 ,  H04B7/0617

摘要： A method of arranging exchange of signals between user terminals in a cellular communication system and at least one base station including a central unit and a plurality of remote units. The method includes exchanging signals with at least one user terminal simultaneously via at least two remote units by applying at the at least two remote units, separate distributing weighting functions to the signals exchanged with the at least one user terminal.

公开(公告)号：US08830907B2

公开(公告)日：2014-09-09

申请号：US13062184

申请日：2008-09-04

申请人： Bruno Melis ,  Rosalba Campanale ,  Alfredo Ruscitto ,  Federica Caldara

发明人： Bruno Melis ,  Rosalba Campanale ,  Alfredo Ruscitto ,  Federica Caldara

IPC分类号： H04W4/00 ,  H04B7/08 ,  H04B1/712 ,  H04B1/7105

CPC分类号： H04B7/0845 ,  H04B1/71055 ,  H04B1/712

摘要： Signals received from channels exposed to multi-path propagation via a plurality of diversity antennas and including at least one pilot signal are processed by detecting a set of multi-path components for each received signal and computing a set of channel coefficients from multi-path components of the at least one pilot signal in the set of multi-path components. The set of channel coefficients is organized as a channel coefficient vector. From the channel coefficient vector, a set of combining weights is estimated to be applied to the received signals by: computing a spatial correlation matrix of the channel coefficient vector by neglecting the correlations between multi-path components of the channel coefficient vector having different delays, whereby the correlation matrix is a block diagonal matrix including null coefficients other than for non-null sub-matrixes arranged along the diagonal of the correlation matrix, wherein the sub-matrixes have a size equal to the number of diversity antennas; deriving from the spatial correlation matrix a resulting matrix by calculating the inverse of the sub-matrixes or a scaled version thereof; and multiplying the resulting matrix and the channel coefficient vector in order to obtain the desired set of combining weights.

摘要翻译： 通过经由多个分集天线暴露于多路径传播并且包括至少一个导频信号的信道接收到的信号通过检测每个接收信号的多路径分量集合并且从多路径分量计算一组信道系数来处理 的多路径分量集合中的至少一个导频信号。 信道系数集合被组织为信道系数向量。 从信道系数向量，通过以下方式估计组合权重集合：通过忽略具有不同延迟的信道系数向量的多径分量之间的相关性来计算信道系数向量的空间相关矩阵， 由此相关矩阵是包括除了相关矩阵的对角线排列的非零子矩阵之外的空系数的块对角矩阵，其中子矩阵的大小等于分集天线的数量; 通过计算子矩阵的逆或其缩放版本从空间相关矩阵导出得到的矩阵; 并乘以所得到的矩阵和信道系数向量，以便获得期望的组合权重集合。

公开(公告)号：US08509724B2

公开(公告)日：2013-08-13

申请号：US12312846

申请日：2006-11-29

申请人： Valeria D'Amico ,  Maurizio Fodrini ,  Bruno Melis ,  Alfredo Ruscitto

发明人： Valeria D'Amico ,  Maurizio Fodrini ,  Bruno Melis ,  Alfredo Ruscitto

IPC分类号： H04B1/06

CPC分类号： H04B7/0874 ,  H04B7/0691 ,  H04B7/084 ,  H04B7/086 ,  H04B7/088

摘要： A wireless communication system, wherein a sub-set of radio frequency signals received from corresponding antenna elements is selected and combined into a single radio frequency signal, the single radio frequency signal being processed and demodulated in a single processing chain, includes a radio frequency phasing network for co-phasing the selected radio frequency signals before combining and a processor for controlling combining and phasing in order to obtain a single radio frequency signal having a radio performance indicator which satisfies predetermined conditions.

摘要翻译： 一种无线通信系统，其中从对应的天线元件接收的射频信号的子集被选择并组合成单个射频信号，在单个处理链中被处理和解调的单个射频信号包括射频定相 网络，用于在组合之前将所选择的射频信号相位，以及用于控制组合和定相的处理器，以便获得具有满足预定条件的无线电性能指示符的单个射频信号。