公开(公告)号：US20110021163A1

公开(公告)日：2011-01-27

申请号：US12933716

申请日：2008-03-28

Applicant: Ulf Lindgren ,  Mikael Coldrey ,  Sven Oscar Petersson ,  Fredrik Harrysson

Inventor： Ulf Lindgren ,  Mikael Coldrey ,  Sven Oscar Petersson ,  Fredrik Harrysson

IPC: H04B1/38

CPC classification number: H04B7/0691 ,  H04B7/04 ,  H04B7/0874

Abstract: The present invention relates to a solution for efficient handling of radio resources in communication devices in a wireless communication network. In the solution a subset of available antennas to be used is chosen using a method for determining a singular valued metric from a sub matrix related to a full channel matrix. Sub-channel matrices are chosen by deducing the metric and comparing to other sub-matrices. Preferably the best sub-channel matrix is used to determine a suitable full channel matrix to use in communication and this full channel matrix is communicated to each involved communication device.

Abstract translation: 本发明涉及无线通信网络中的通信设备中无线电资源的有效处理的解决方案。 在解决方案中，使用用于从与全信道矩阵相关的子矩阵确定奇异值度量的方法来选择要使用的可用天线的子集。 通过推导度量并与其他子矩阵进行比较来选择子信道矩阵。 优选地，最佳子信道矩阵用于确定在通信中使用的合适的全信道矩阵，并且将该全信道矩阵传送到每个相关的通信设备。

公开(公告)号：US20110002414A1

公开(公告)日：2011-01-06

申请号：US12919301

申请日：2008-02-25

Applicant: Mikael Coldrey ,  Fredrik Athley ,  Ulf Lindgren ,  Sven Oscar Petersson

Inventor： Mikael Coldrey ,  Fredrik Athley ,  Ulf Lindgren ,  Sven Oscar Petersson

IPC: H04L25/03

CPC classification number: H04B7/0426 ,  H04B7/0617

Abstract: A method of and a precoding device and a communication device for precoding transmit data signals in a wireless Multiple-Input Multiple-Output, MIMO, channel transmission scheme for maximizing channel capacity of the MIMO system given available amounts of transmit power. The precoding is expressed in a complex precoding matrix (W), which is calculated involving individual transmit power constraints of the multiple outputs (71, . . . , 7t) of the MIMO channel. The individual transmit power constraints are comprised of predetermined individual output transmit power amplifier (PA1, . . . , PAt) limitations.

Abstract translation: 一种预编码装置和通信装置的方法，用于在无线多输入多输出MIMO信道传输方案中预编码发射数据信号，用于在给定可用的发射功率量下最大化MIMO系统的信道容量。 预编码在复数预编码矩阵（W）中表示，其被计算涉及MIMO信道的多个输出（71，...，7t）的各个发射功率约束。 单个发射功率约束由预定的单独输出发射功率放大器（PA1，...，PAt）限制组成。

公开(公告)号：US20100074300A1

公开(公告)日：2010-03-25

申请号：US12447292

申请日：2006-10-27

Applicant: Ulf Lindgren

Inventor： Ulf Lindgren

IPC: H04B1/69 ,  H04L27/06

CPC classification number: H04L25/03993 ,  H04B1/7115 ,  H04B2201/709727 ,  H04L2025/03426

Abstract: A method for simplifying calculations for pre-whitening in a G-RAKE receiver, comprising receiving at least two signals with at least two antennas via a channel, where each one of said received signals comprises time delayed and attenuated versions of the original signals. Each received signal forms a corresponding vector of received signal versions and the vectors form a matrix of received signals, where, due to correlation between the antennas, the received signals are correlated. Each version also comprises a certain amount of colored noise. The correlating effect of the antennas is estimated and formulated in matrix form and used to acquire essentially uncorrelated received signal vectors in an essentially uncorrelated received signal matrix. A calculated inverse of a covariance matrix of the calculated essentially uncorrelated signal vectors is used to pre-whiten the noise. A G-RAKE receiver arranged for applying the method above.

Abstract translation: 一种用于简化G-RAKE接收机中的前白化计算的方法，包括经由信道至少接收至少两个天线的至少两个信号，其中每个所述接收信号包括原始信号的时间延迟和衰减版本。 每个接收的信号形成接收信号版本的对应矢量，并且矢量形成接收信号的矩阵，其中由于天线之间的相关性，接收信号相关。 每个版本还包含一定量的彩色噪音。 天线的相关效应被估计并以矩阵形式表示，并且用于在基本上不相关的接收信号矩阵中获取基本上不相关的接收信号向量。 使用计算出的基本上不相关的信号向量的协方差矩阵的计算逆来预处理噪声。 G-RAKE接收机被设置为应用上述方法。

公开(公告)号：US20100066635A1

公开(公告)日：2010-03-18

申请号：US12517130

申请日：2006-11-30

Applicant: Ulf Lindgren ,  Fredrik Athley

Inventor： Ulf Lindgren ,  Fredrik Athley

IPC: H01Q21/06

CPC classification number: H01Q21/06 ,  H01Q1/523 ,  H01Q3/24 ,  H01Q21/065 ,  H01Q21/20

Abstract: A microwave array antenna arrangement comprising at least two groups of antenna elements and at least two antenna elements in each group. All groups comprise an equal amount of antenna elements, where the arrangement further comprises one radio chain for each group of antenna elements. The arrangement also comprises one switch for each radio chain, the switches being arranged for cyclically connecting each radio chain to the antenna elements in each respective group of antenna elements.

Abstract translation: 一种微波阵列天线装置，其包括至少两组天线元件和至少两个天线元件。 所有组包括等量的天线元件，其中该装置还包括用于每组天线元件的一个无线电链。 该布置还包括用于每个无线电链的一个开关，开关被布置为将每个无线电链周期性地连接到每个相应天线元件组中的天线元件。

公开(公告)号：US20090309802A1

公开(公告)日：2009-12-17

申请号：US12306822

申请日：2006-06-30

Applicant: Ulf Lindgren

Inventor： Ulf Lindgren

IPC: H01Q21/00

CPC classification number: H01Q21/10 ,  H01Q9/285 ,  H04B7/0413 ,  H04B7/0434

Abstract: The present invention relates to a method for acquiring a configuration of a re-configurable antenna, having at least two different antenna element configurations, where the antenna's element mutual coupling characteristics are known in advance in the form of an antenna coupling matrix (Ck(n)), the acquired configuration having a desired effect on a transmission channel, the method comprising the steps: setting an initial configuration of the re-configurable antenna, resulting in an initial coupling matrix (C0); estimating the transmission channel matrix (Ĥ(n)), which transmission channel matrix (Ĥ(n)) includes the effect of the antenna; calculating a generic transmission channel matrix ({tilde over (Ĥ)}(n)), which generic transmission channel matrix ({tilde over (Ĥ)}(n)) excludes the effect of the antenna; and extracting a coupling matrix (C) that provides a desired transmission channel matrix (H(n)), including the effect of the antenna.

Abstract translation: 本发明涉及一种用于获取具有至少两个不同天线元件配置的可再配置天线的配置的方法，其中天线元件的互耦合特性预先以天线耦合矩阵（Ck（n ）），所获取的配置对传输信道具有期望的效果，所述方法包括以下步骤：设置可重新配置的天线的初始配置，得到初始耦合矩阵（C0）; 估计传输信道矩阵（H（n））包括天线的影响的传输信道矩阵（H（n））; 计算通用传输信道矩阵（{（t）（（H）}（n）），哪个通用传输信道矩阵（{tilde over（H）}（n））排除了天线的影响; 以及提取包括天线的效果的提供期望的传输信道矩阵（H（n））的耦合矩阵（C）。

公开(公告)号：US06900381B2

公开(公告)日：2005-05-31

申请号：US10145782

申请日：2002-05-16

Applicant: Ulf Lindgren ,  Alberto Jimenez Feltström ,  Thomas Jacobsson

Inventor： Ulf Lindgren ,  Alberto Jimenez Feltström ,  Thomas Jacobsson

IPC: G10H7/02 ,  G10H7/04 ,  G10H7/00

CPC classification number: G10H7/045 ,  G10H2210/225 ,  G10H2230/015 ,  G10H2240/056 ,  G10H2240/251 ,  G10H2250/145 ,  G10H2250/281 ,  G10H2250/285 ,  G10H2250/291 ,  G10H2250/545 ,  G10H2250/631

Abstract: A method and apparatus are provided for changing the pitch of a tabulated waveform in wavetable based synthesizers. Harmonics that normally would be aliased before a transposition process are removed by a discrete time low pass filter at the same time that the tabulated waveform is reconstruction and resampling.

Abstract translation: 提供了一种用于改变基于波表的合成器中的列表波形的音调的方法和装置。 在转置处理之前通常将被别名的谐波通过离散时间低通滤波器去除，同时制表波形是重建和重采样。

公开(公告)号：US06597787B1

公开(公告)日：2003-07-22

申请号：US09628932

申请日：2000-07-28

Applicant: Ulf Lindgren ,  Mohan Misra ,  John Philipsson

Inventor： Ulf Lindgren ,  Mohan Misra ,  John Philipsson

IPC: H04M908

CPC classification number: H04M9/082 ,  H04B3/21

Abstract: An echo cancellation device (ECD) comprises an echo canceller (EC) including a transfer function estimator (EST, H) and a subtractor (ADD) and a residual echo suppression device (G, ADD2). The residual echo suppression device (G) comprises a residual echo filter (G) having an adjustable filter function (g). This filter function (g) can be adapted to either remove from the subtractor output (TNE′) the spectral characteristics relating to the reception signal (RFE) and/or to emphasize in the subtractor output signal (TNE′) a background signal spectral content relating to the transmission signal (TNE). A noise generation means (NGM′) can be provided at the output of the adaptable filter (G) for injecting a noise process in to the filter output signal (TNE′) prior to a speech coding in a speech coder (COD). The noise process masks in the filter output signal a spectral content relating to the reception signal (RFE).

Abstract translation: 回波消除装置（ECD）包括包括传递函数估计器（EST，H）和减法器（ADD）和残余回声抑制装置（G，ADD2）的回波消除器（EC）。 残余回声抑制装置（G）包括具有可调滤波器功能（g）的残余回波滤波器（G）。 该滤波器功能（g）可以适于从减法器输出（TNE'）移除与接收信号（RFE）相关的频谱特性和/或在减法器输出信号（TNE'）中强调背景信号频谱内容 涉及传输信号（TNE）。 在适应滤波器（G）的输出处可以提供噪声发生装置（NGM'），用于在语音编码器（COD）中的语音编码之前将噪声处理注入到滤波器输出信号（TNE'）中。 噪声处理在滤波器输出信号中屏蔽与接收信号（RFE）相关的频谱内容。

公开(公告)号：US06577675B2

公开(公告)日：2003-06-10

申请号：US09901471

申请日：2001-07-09

Applicant: Ulf Lindgren ,  Holger Broman

Inventor： Ulf Lindgren ,  Holger Broman

IPC: H04L2730

CPC classification number: H03H21/0025 ,  G10L21/0308 ,  H03H2021/0034

Abstract: Method for separating a mixture of source signals to regain said source signals, said method being based on measured signals. The method being characterized in, that every measured signal is brought to a separation structure comprising cross connected linear filters and subsequent adders, that cross correlation functions between the signals after said adders are calculated for delays k between a first delay K1 and a last delay K2, that a criterion function is used to determine how the linear filters comprised in said separation structure will be designed in every real situation, that said criterion function is formulated as a sum of terms where the addition is extended to all possible cross correlation functions between the output signals of separation structure at all possible delays (k) between K1 and K2, and that each term in said sum has a weight factor and another factor consisting of an even function, f, of a specific cross correlation function at a specific delay.