公开(公告)号：US07904093B2

公开(公告)日：2011-03-08

申请号：US10582478

申请日：2004-12-01

申请人： Johan Nyström ,  Pål Frenger ,  Erik Dahlman ,  Svante Signell ,  Göran Klang

发明人： Johan Nyström ,  Pål Frenger ,  Erik Dahlman ,  Svante Signell ,  Göran Klang

IPC分类号： H04W72/00

CPC分类号： H04L5/0048 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/006 ,  H04L25/0226 ,  H04W16/02 ,  H04W16/10 ,  H04W16/12 ,  H04W52/325 ,  H04W72/08

摘要： A set of different pilot structures are designed for use in different environments and/or different user behaviours that are expected to occur in a cell. The radio conditions for a user are estimated. Each user is then assigned an area (108A-E) in resource space for its communication, which has a suitable pilot configuration. In one embodiment, the entire resource space is provided with different pilot structures in different parts (110A-D) In advance and allocation of resources to the users are then performed in order to match estimated radio conditions to the provided pilot structure. In another embodiment, allocation is performed first, and then the actual pilot structure is adapted within the allocated resource space area to suit the environmental conditions.

摘要翻译： 一组不同的导频结构被设计用于不同环境和/或预期在小区中发生的不同用户行为。 估计用户的无线电条件。 然后，在用于其通信的资源空间中为每个用户分配一个区域（108A-E），该区域具有合适的导频配置。 在一个实施例中，整个资源空间在不同部分（110A-D）中设置有不同的导频结构。 然后提前向用户分配资源，以便将估计的无线电条件与所提供的导频结构相匹配。 在另一个实施例中，首先执行分配，然后在所分配的资源空间区域内适配实际的导频结构以适应环境条件。

公开(公告)号：US06370397B1

公开(公告)日：2002-04-09

申请号：US09070778

申请日：1998-05-01

申请人： Branislav M. Popović ,  Frank Georg ,  Matthlas Schulist ,  Göran Klang

发明人： Branislav M. Popović ,  Frank Georg ,  Matthlas Schulist ,  Göran Klang

IPC分类号： H04B138

CPC分类号： H04B1/7085 ,  G01S5/0215 ,  H04B1/7113 ,  H04B1/7117

摘要： The present invention provides a search window delay tracking procedure for use in a multipath search processor of a CDMA radio receiver. A channel impulse responses is estimated for a received signal containing plural paths, each path having a corresponding path delay. A search window defines a delay profile that contains the plural paths of the received signal. A mean or average delay is calculated for the estimated channel impulse response (CIR), and an error is determined between the mean CIR delay and a desired delay position corresponding to the center of the CIR search window. An adjustment is made to reduce that error so that the center of the search window and the mean CIR delay are aligned. The error may be processed either linearly (in one embodiment) or non-linearly (in another embodiment) to minimize the error and to reduce an influence of noise. A non-linear filtering process includes calculating a delay spread from the mean CIR delay calculated for successive processing cycles of a window delay tracking procedure corresponding to each new input. A difference is determined between the successive delay spreads. Adjustment signal is set equal to the error signal if the difference is less than or equal to a threshold. Alternatively, the adjustment signal is set to zero if the difference is greater than the threshold. Consequently, if the delay spread in the current iteration is significantly different from the delay spread in the previous iteration, the new error sample calculated in the current iteration is considered unreliable, and no adjustment is made.

摘要翻译： 本发明提供了一种在CDMA无线电接收机的多路径搜索处理器中使用的搜索窗延迟跟踪程序。 对于包含多个路径的接收信号估计信道脉冲响应，每个路径具有对应的路径延迟。 搜索窗口定义包含接收信号的多个路径的延迟分布。 对于估计的信道脉冲响应（CIR）计算平均或平均延迟，并且在平均CIR延迟和对应于CIR搜索窗口的中心的期望延迟位置之间确定误差。 进行调整以减少该误差，使得搜索窗口的中心和平均CIR延迟对齐。 该错误可以线性地（在一个实施例中）或非线性（在另一个实施例中）处理以最小化误差并减少噪声的影响。 非线性滤波处理包括从对应于每个新输入的窗延迟跟踪程序的连续处理周期计算的平均CIR延迟来计算延迟扩展。 在连续的延迟传播之间确定差异。 如果差值小于或等于阈值，则将调整信号设置为等于误差信号。 或者，如果差值大于阈值，则将调整信号设置为零。 因此，如果当前迭代中的延迟扩展与前一次迭代中的延迟扩展明显不同，则在当前迭代中计算出的新的误差样本被认为是不可靠的，不进行调整。

公开(公告)号：US07912475B2

公开(公告)日：2011-03-22

申请号：US11578515

申请日：2005-03-29

申请人： Göran Klang ,  Pål Frenger ,  Stefan Parkvall ,  Johan Nyström

发明人： Göran Klang ,  Pål Frenger ,  Stefan Parkvall ,  Johan Nyström

IPC分类号： H04W72/00

CPC分类号： H04W16/10 ,  H04W72/08

摘要： Radio resources are allocated to communication between a mobile station and a base station. The available set of radio resources may comprise radio resources primarily assigned to a neighboring cell if the 5 mobile station experience an instantaneous low level of co-channel interference from such neighboring cells. The existence of interference is preferably deduced from signal quality measurements of pilot signals. The allocation may concern uplink and/or downlink communication. Devices for performing the measurements are located in the mobile station, while devices for performing the evaluation, selection and actual allocation can be placed in different parts of the communications system—in the mobile station, in a base station or in a core network node, or as a distributed means.

摘要翻译： 无线资源分配给移动台与基站之间的通信。 如果5个移动站体验到来自这些相邻小区的同信道干扰的瞬时低电平，则可用的无线电资源组可以包括主要分配给相邻小区的无线电资源。 干扰的存在优先从导频信号的信号质量测量推导出来。 该分配可以涉及上行链路和/或下行链路通信。 用于执行测量的设备位于移动站中，而用于执行评估，选择和实际分配的设备可以放置在移动站，基站或核心网络节点中的通信系统的不同部分中， 或作为分布式手段。

公开(公告)号：US20110136496A1

公开(公告)日：2011-06-09

申请号：US13026724

申请日：2011-02-14

申请人： Göran KLANG ,  Pål Frenger ,  Stefan Parkvall ,  Johan Nyström

发明人： Göran KLANG ,  Pål Frenger ,  Stefan Parkvall ,  Johan Nyström

IPC分类号： H04W72/08 ,  H04W24/00

CPC分类号： H04W16/10 ,  H04W72/08

摘要： Radio resources are allocated to communication between a mobile station and a base station. The available set of radio resources may comprise radio resources primarily assigned to a neighboring cell if the 5 mobile station experience an instantaneous low level of co-channel interference from such neighboring cells. The existence of interference is preferably deduced from signal quality measurements of pilot signals. The allocation may concern uplink and/or downlink communication. Devices for performing the measurements are located in the mobile station, while devices for performing the evaluation, selection and actual allocation can be placed in different parts of the communications system-in the mobile station, in a base station or in a core network node, or as a distributed means.

摘要翻译： 无线资源分配给移动台与基站之间的通信。 如果5个移动站体验到来自这些相邻小区的同信道干扰的瞬时低电平，则可用的无线电资源集合可以包括主要分配给相邻小区的无线电资源。 干扰的存在优先从导频信号的信号质量测量推导出来。 该分配可以涉及上行链路和/或下行链路通信。 用于执行测量的设备位于移动站中，而用于执行评估，选择和实际分配的设备可以放置在移动站，基站或核心网络节点中的通信系统的不同部分中， 或作为分布式手段。

公开(公告)号：US07881260B2

公开(公告)日：2011-02-01

申请号：US10582688

申请日：2003-12-19

申请人： Johan Nyström ,  Göran Klang ,  Pal Frenger

发明人： Johan Nyström ,  Göran Klang ,  Pal Frenger

IPC分类号： H04J11/00 ,  H04W72/00

CPC分类号： H04L5/0044 ,  H04L5/0007 ,  H04L27/261 ,  H04W16/00 ,  H04W16/12

摘要： A method for use in a cellular, FFT based multi-carrier communications system comprising N subcarriers, for allocating a set P of sub-carriers to be reserved for potential use as carriers of specific information. A number M indicating the number of sub-carriers to be allocated to a set P of sub-carriers, such that L=N/M is an integer. At least two subcarriers of the set P={(n0+m*L) mod N : 0≦m

摘要翻译： 一种在基于FFT的多载波通信系统中使用的方法，其包括N个子载波，用于分配待保留用于潜在用途的子载波的集合P作为特定信息的载体。 指示要分配给子载波的集合P的子载波的数量的数字M，使得L = N / M是整数。 对于特定信息，集合P = {（n0 + m * L）mod N：0＆nlE; m

公开(公告)号：US08843144B2

公开(公告)日：2014-09-23

申请号：US12926511

申请日：2010-11-23

申请人： Johan Nyström ,  Pál Frenger ,  Erik Dahlman ,  Svante Signell ,  Göran Klang

发明人： Johan Nyström ,  Pál Frenger ,  Erik Dahlman ,  Svante Signell ,  Göran Klang

IPC分类号： H04W72/00 ,  H04W16/12 ,  H04L25/02 ,  H04W16/02 ,  H04L5/00 ,  H04W72/08 ,  H04W52/32 ,  H04W16/10 ,  H04L1/00

CPC分类号： H04L5/0048 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/006 ,  H04L25/0226 ,  H04W16/02 ,  H04W16/10 ,  H04W16/12 ,  H04W52/325 ,  H04W72/08

摘要： A set of different pilot structures are designed for use in different environments and/or different user behaviors that are expected to occur in a cell. The radio conditions for a user are estimated. Each user is then assigned an area (108A-E) in resource space for its communication, which has a suitable pilot configuration. In one embodiment, the entire resource space is provided with different pilot structures in different parts (110A-D) In advance and allocation of resources to the users are then performed in order to match estimated radio conditions to the provided pilot structure. In another embodiment, allocation is performed first, and then the actual pilot structure is adapted within the allocated resource space area to suit the environmental conditions.

摘要翻译： 一组不同的导频结构被设计用于不同环境和/或预期在小区中发生的不同用户行为。 估计用户的无线电条件。 然后，在用于其通信的资源空间中为每个用户分配一个区域（108A-E），该区域具有合适的导频配置。 在一个实施例中，预先为不同部分（110A-D）提供不同的导频结构，然后执行向用户的资源分配，以将估计的无线电条件与所提供的导频结构相匹配。 在另一个实施例中，首先执行分配，然后在所分配的资源空间区域内适配实际的导频结构以适应环境条件。

公开(公告)号：US06363106B1

公开(公告)日：2002-03-26

申请号：US09039371

申请日：1998-03-16

申请人： Branislav M. Popović ,  Göran Klang

发明人： Branislav M. Popović ,  Göran Klang

IPC分类号： H04L2730

CPC分类号： H04B1/707 ,  H04L27/2331

摘要： Incoming signals in a receiver for Direct Sequence Code Division Multiple Access systems are despread using Offset-QPSK spreading as the transmitting spreading format combined with arbitrary data modulation formats, such as BPSK and QPSK. The receiver has a pseudonoise (PN) generator for generating a unique PN sequence signal. The PN sequence signal is divided into a real and an imaginary component. The complex input signal is divided into inphase and quadrature components. The inphase and the quadrature components of the input signal are downsampled to provide either two complex samples per chip period or one complex sample per chip period. In the latter case, the downsampling instants are delayed by a quarter of a chip period. Each downsampled complex signal is correlated with the corresponding segment of the complex PN sequence signal of the receiver. In the case where two samples per chip are provided after downsampling, the correlation values obtained for odd and even complex samples of the downsampled input signal are summed.

摘要翻译： 用于直接序列码分多址系统的接收机中的接收信号使用偏移QPSK扩展作为与任意数据调制格式（诸如BPSK和QPSK）组合的发射扩展格式进行解扩。 接收机具有用于产生唯一PN序列信号的伪噪声（PN）发生器。 PN序列信号被分成实部和虚部。 复合输入信号被分为同相和正交分量。 输入信号的同相和正交分量被下采样以在每个码片周期提供两个复杂样本或每个码片周期提供一个复杂样本。 在后一种情况下，下采样时刻延迟了芯片周期的四分之一。 每个下采样的复信号与接收机的复数PN序列信号的相应段相关。 在下采样之后提供每个芯片两个样本的情况下，对下采样输入信号的奇数和偶数复样本获得的相关值相加。

公开(公告)号：US20110075625A1

公开(公告)日：2011-03-31

申请号：US12926511

申请日：2010-11-23

申请人： Johan Nyström ,  Pàl Frenger ,  Erik Dahlman ,  Svante Signell ,  Göran Klang

发明人： Johan Nyström ,  Pàl Frenger ,  Erik Dahlman ,  Svante Signell ,  Göran Klang

IPC分类号： H04W4/00

CPC分类号： H04L5/0048 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/006 ,  H04L25/0226 ,  H04W16/02 ,  H04W16/10 ,  H04W16/12 ,  H04W52/325 ,  H04W72/08

摘要： A set of different pilot structures are designed for use in different environments and/or different user behaviours that are expected to occur in a cell. The radio conditions for a user are estimated. Each user is then assigned an area (108A-E) in resource space for its communication, which has a suitable pilot configuration. In one embodiment, the entire resource space is provided with different pilot structures in different parts (110A-D) In advance and allocation of resources to the users are then performed in order to match estimated radio conditions to the provided pilot structure. In another embodiment, allocation is performed first, and then the actual pilot structure is adapted within the allocated resource space area to suit the environmental conditions.

摘要翻译： 一组不同的导频结构被设计用于不同环境和/或预期在小区中发生的不同用户行为。 估计用户的无线电条件。 然后，在用于其通信的资源空间中为每个用户分配一个区域（108A-E），该区域具有合适的导频配置。 在一个实施例中，预先为不同部分（110A-D）提供不同的导频结构，然后执行向用户的资源分配，以将估计的无线电条件与所提供的导频结构相匹配。 在另一个实施例中，首先执行分配，然后在所分配的资源空间区域内适配实际的导频结构以适应环境条件。

公开(公告)号：US06229842B1

公开(公告)日：2001-05-08

申请号：US09116263

申请日：1998-07-16

申请人： Matthias Schulist ,  Göran Klang ,  Ning He

发明人： Matthias Schulist ,  Göran Klang ,  Ning He

IPC分类号： H04B1707

CPC分类号： H04B1/7113 ,  H04B1/7117 ,  H04B7/0802

摘要： A system and method for detecting and selecting peaks in a delay power profile (DPP) signal. An adaptive threshold is used to determine valid paths in the DPP signal. The adaptive threshold is determined by measuring the signal-to-noise ratio of the DPP signal, and setting the threshold to minimize non-detections and false alarms in path estimation. To determine the signal-to-noise ratio, the system uses an iterative process wherein a raw estimate and an improved estimate are made of the noise.

摘要翻译： 一种在延迟功率谱（DPP）信号中检测和选择峰值的系统和方法。 自适应阈值用于确定DPP信号中的有效路径。 通过测量DPP信号的信噪比来确定自适应阈值，并设置阈值以最小化路径估计中的非检测和误报警。 为了确定信噪比，系统使用迭代过程，其中原始估计和改进的估计是由噪声构成的。