公开(公告)号：US07423994B2

公开(公告)日：2008-09-09

申请号：US11097877

申请日：2005-04-01

Applicant: Jing Liu ,  Bijan Tuysserkani ,  Jon James Anderson ,  Kurt William Otte ,  Matthias Brehler

Inventor： Jing Liu ,  Bijan Tuysserkani ,  Jon James Anderson ,  Kurt William Otte ,  Matthias Brehler

IPC: H04Q7/00

CPC classification number: H04B1/70754 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: Methods and apparatus for searching a list of pilot signals. A method is provided for searching a list of pilot signals in a communication network. The method includes defining a prio list that indicates an order in which the list of pilot signals will be searched, obtaining a search duration, and determining an indicator that identifies a portion of the prio list that can be searched within the search duration. The method also includes performing a search of the portion of the prio list, and updating the list of pilot signals based on the results of the search.

Abstract translation: 用于搜索导频信号列表的方法和装置。 提供了一种用于搜索通信网络中的导频信号的列表的方法。 该方法包括：定义一个列表，其指示将搜索导频信号的列表的顺序，获得搜索持续时间，以及确定标识在搜索持续时间内可被搜索的一部分列表的指示符。 该方法还包括执行对该列表的部分的搜索，以及基于搜索的结果来更新导频信号的列表。

公开(公告)号：US20060135073A1

公开(公告)日：2006-06-22

申请号：US11019141

申请日：2004-12-20

Applicant: Nagabhushan Kurapati ,  Matthias Brehler

Inventor： Nagabhushan Kurapati ,  Matthias Brehler

IPC: H04Q7/20

CPC classification number: H04L25/0212 ,  H04L25/0224 ,  H04W68/00

Abstract: For signaling detection using an adaptive threshold, the channel condition obsereved by a signaling bit (e.g., a paging indicator bit) is estimated (e.g., by a pilot strength estimate). A metric for the signaling bit is computed based on recovered symbols for the signaling bit and the estimated channel condition. An adaptive threshold is selected based on the estimated channel condition. A decision is derived for the signaling bit based on the metric, the adaptive threshold, and the estimated channel condition. Multiple threshold values may be derived for the adaptive threshold for multiple ranges of estimated channel condition, one threshold value for each range. A look-up table stores the threshold values and provides the proper adaptive threshold value for any given estimated channel condition.

Abstract translation: 对于使用自适应阈值的信令检测，估计信令位（例如，寻呼指示符位）所占据的信道条件（例如，通过导频强度估计）。 基于用于信令位的恢复符号和估计的信道条件来计算信令位的度量。 基于估计的信道条件来选择自适应阈值。 基于度量，自适应阈值和估计的信道条件，导出用于信令比特的决定。 可以针对估计的信道条件的多个范围的自适应阈值导出多个阈值，每个范围的一个阈值。 查找表存储阈值，并为任何给定的估计信道条件提供适当的自适应阈值。

公开(公告)号：US08861480B2

公开(公告)日：2014-10-14

申请号：US12610293

申请日：2009-10-31

Applicant: Tom Chin ,  Guangming Carl Shi ,  Kuo-Chun Lee ,  Serguei A. Glazko ,  Matthias Brehler

Inventor： Tom Chin ,  Guangming Carl Shi ,  Kuo-Chun Lee ,  Serguei A. Glazko ,  Matthias Brehler

IPC: H04W36/18 ,  H04W36/00

CPC classification number: H04W36/0027 ,  H04B7/0413 ,  H04W36/0066 ,  H04W36/0083

Abstract: Methods provided may generally include sending a BS of a first RAT a request message indicating a set of MIMO resources to reallocate; during a scan duration, communicating with the BS of the first RAT using non-reallocated MIMO resources and communicating with a BS of a second RAT using reallocated MIMO resources; and during a normal duration, communicating with the BS of the first RAT using the reallocated and non-reallocated MIMO resources. Apparatus provided may generally include logic for receiving a request message indicating a set of MIMO resources of the MS to reallocate; logic for, during a scan duration, communicating with the MS in a first transmission mode assuming the use of only non-reallocated MIMO resources by the MS; and logic for, during a normal duration, communicating with the MS in a second transmission mode assuming the use of the reallocated and non-reallocated MIMO resources by the MS.

Abstract translation: 提供的方法通常可以包括：发送指示一组MIMO资源以重新分配的请求消息的第一RAT的BS; 在扫描持续时间期间，使用非重新分配的MIMO资源与第一RAT的BS进行通信，并使用重新分配的MIMO资源与第二RAT的BS进行通信; 并且在正常持续时间期间，使用重新分配的和非重新分配的MIMO资源与第一RAT的BS进行通信。 所提供的装置通常可以包括用于接收指示MS重新分配的一组MIMO资源的请求消息的逻辑; 假设在扫描持续时间期间，假设仅使用非重新分配的MIMO资源，以第一传输模式与MS进行通信; 以及在正常持续时间期间，假设使用由MS重新分配的和未重新分配的MIMO资源，在第二传输模式中进行通信的逻辑。

公开(公告)号：US08619746B2

公开(公告)日：2013-12-31

申请号：US11548050

申请日：2006-10-10

Applicant: James Edward Beckman ,  Joseph Chan ,  Farrokh Abrishamkar ,  Matthias Brehler ,  Michael Leviant

Inventor： James Edward Beckman ,  Joseph Chan ,  Farrokh Abrishamkar ,  Matthias Brehler ,  Michael Leviant

IPC: H04B7/208

CPC classification number: H04L25/023 ,  H04L5/0048 ,  H04L25/0244 ,  H04L25/025

Abstract: Techniques for deriving a channel estimate using a scattered pilot and a continual pilot are described. The scattered pilot is sent on different sets of carriers in different symbol periods. The continual pilot is sent in each symbol period on irregularly spaced carriers. The scattered pilot is used to identify the indices of channel taps of interest, e.g., L strongest channel taps. The continual pilot is used to determine the complex gains of these L channel taps. A receiver derives a channel impulse response estimate based on received pilot symbols for the scattered pilot, identifies the L strongest channel taps, and determines the indices of these L strongest channel taps. The receiver forms a Fourier sub-matrix based on the L tap indices and determines the gains of the L channel taps based on received pilot symbols for the continual pilot and the Fourier sub-matrix.

Abstract translation: 描述了使用分散导频和连续导频来导出信道估计的技术。 分散导频在不同符号周期的不同载波集上发送。 连续飞行员在每个符号周期发送不规则的航空母舰。 分散导频用于识别所关心的信道抽头的索引，例如L个最强的信道抽头。 连续导频用于确定这些L信道分接头的复杂增益。 接收机基于接收到的导频符号导出用于散射导频的信道脉冲响应估计，识别L个最强信道抽头，并且确定这些L个最强信道抽头的索引。 接收器基于L抽头索引形成傅里叶子矩阵，并且基于用于连续导频和傅里叶子矩阵的接收导频符号确定L个信道抽头的增益。

公开(公告)号：US08494065B2

公开(公告)日：2013-07-23

申请号：US12479553

申请日：2009-06-05

Applicant: Matthias Brehler ,  Brian C. Banister ,  Peter Gaal

Inventor： Matthias Brehler ,  Brian C. Banister ,  Peter Gaal

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04L5/0007 ,  H04L5/0037 ,  H04L27/2657

Abstract: Systems and methodologies are described that facilitate signal separation across different carriers within a wireless communications environment. The systems and methods can identify a carrier spacing that can be based upon a tone spacing associated with two or more carriers. Such carrier spacing can be employed within a network in order to mitigate signal separation with multiple carriers. The subject innovation can further evaluate a carrier raster associated with a network in order to identify a carrier spacing to ensure orthogonality between tones from different carriers.

Abstract translation: 描述了在无线通信环境内促进跨越不同载波的信号分离的系统和方法。 系统和方法可以识别可以基于与两个或更多个载波相关联的音调间隔的载波间隔。 这样的载波间隔可以在网络内使用，以便减轻与多个载波的信号分离。 本发明可以进一步评估与网络相关联的载波光栅，以便识别载波间隔，以确保来自不同载波的音调之间的正交性。

公开(公告)号：US08098567B2

公开(公告)日：2012-01-17

申请号：US11777251

申请日：2007-07-12

Applicant: Matthias Brehler ,  Joseph Chan

Inventor： Matthias Brehler ,  Joseph Chan

IPC: H04J11/00

CPC classification number: H04L27/2695 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2665

Abstract: Apparatus and methods are provided for making timing adjustments in a multi carrier communications system. In an aspect, a timing correction method is provided for a multi-carrier system. This includes adjusting the time basis of two or more pilot interlaces with respect to each other in order to account for timing differences between the interlaces when combining the interlaces, and then adjusting or matching the time bases of the combined interlaces with a symbol to be demodulated. The alignment and matching is performed in order to generate channel estimates for data demodulation. The channel estimates, thus generated, along with the timing alignment information are in turn used for determining timing corrections to be applied to demodulation of a particular symbol. Corresponding apparatus are also disclosed that implement the methodology.

Abstract translation: 提供了用于在多载波通信系统中进行时序调整的装置和方法。 在一方面，为多载波系统提供定时校正方法。 这包括相对于彼此调整两个或多个导频交织的时间基准，以便在组合交织时考虑交织之间的定时差，然后将组合交织的时基与要解调的符号进行调整或匹配 。 执行对准和匹配以便产生用于数据解调的信道估计。 由此产生的信道估计与定时对准信息一起用于确定要应用于特定符号的解调的定时校正。 还公开了实现该方法的相应装置。

公开(公告)号：US20100177852A1

公开(公告)日：2010-07-15

申请号：US12351797

申请日：2009-01-09

Applicant: Junqiang Li ,  Matthias Brehler ,  Je Woo Kim

Inventor： Junqiang Li ,  Matthias Brehler ,  Je Woo Kim

IPC: H04L27/06

CPC classification number: H04L27/2662 ,  H04L27/2665

Abstract: Techniques proposed in the present disclosure may used to update an FFT window position and perform linear phase compensation for OFDM wireless systems with up to two antennas at the receiver. Techniques presented herein may help resolve a problem of determining an optimum FFT window position under the condition that the length of channel impulse response is larger than the length of cyclic prefix.

Abstract translation: 在本公开中提出的技术可以用于更新FFT窗口位置并且在接收机处使用具有多达两个天线的OFDM无线系统执行线性相位补偿。 本文提出的技术可以帮助解决在信道脉冲响应的长度大于循环前缀的长度的条件下确定最佳FFT窗口位置的问题。

公开(公告)号：US20100158170A1

公开(公告)日：2010-06-24

申请号：US12337632

申请日：2008-12-18

Applicant: Junqiang Li ,  Je Woo Kim ,  Matthias Brehler ,  Michael McCloud

Inventor： Junqiang Li ,  Je Woo Kim ,  Matthias Brehler ,  Michael McCloud

IPC: H04J11/00 ,  H04B1/10

CPC classification number: H04L27/2657 ,  H04L27/2607 ,  H04L27/2665

Abstract: Techniques for the adjustment of a position of Fast Fourier Transform (FFT) window are provided. The adjustment may be based on the condition that the length of channel impulse response is larger than the length of cyclic prefix. The technique may determine a position of the FFT window that attempts to maximize carrier-to-noise (C/N) ratio value measured at the receiver.

Abstract translation: 提供了用于调整快速傅立叶变换（FFT）窗口位置的技术。 调整可以基于信道脉冲响应的长度大于循环前缀的长度的条件。 该技术可以确定尝试最大化在接收机处测量的载波噪声（C / N）比值的FFT窗口的位置。

公开(公告)号：US20100091912A1

公开(公告)日：2010-04-15

申请号：US12351820

申请日：2009-01-10

Applicant: Jong Hyeon Park ,  Matthias Brehler ,  Brian Clarke Banister ,  Albert van Zelst ,  Tae Ryun Chang ,  Vincent K. Jones ,  Je Woo Kim

Inventor： Jong Hyeon Park ,  Matthias Brehler ,  Brian Clarke Banister ,  Albert van Zelst ,  Tae Ryun Chang ,  Vincent K. Jones ,  Je Woo Kim

IPC: H04L27/06

CPC classification number: H04L25/03171 ,  H04L5/0023 ,  H04L25/03197 ,  H04L25/03331 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Certain embodiments of the present disclosure provide techniques for approximate computation of l2 norms as a part of the maximum likelihood (ML) detection: tri-maxmin, maxsum and sortsum algorithms. The proposed approximation schemes show better accuracy than conventional approximation schemes—the abssum and maxmin algorithms, while the computational complexity is very similar. The error rate performance of the ML detection that utilizes proposed norm-approximation techniques are very close to the reference ML detection with exact calculation of l2 norms, while the computational complexity is significantly smaller.

Abstract translation: 本公开的某些实施例提供了作为最大似然（ML）检测的一部分近似计算l2范数的技术：tri-maxmin，maxsum和sortsum算法。 所提出的近似方案显示出比传统的近似方案更好的精度 - abssum和maxmin算法，而计算复杂度非常相似。 利用提出的范数近似技术的ML检测的误码率性能与精确计算l2范数的参考ML检测非常接近，而计算复杂度显着更小。

公开(公告)号：US20090316815A1

公开(公告)日：2009-12-24

申请号：US12486744

申请日：2009-06-17

Applicant: Serguei A. Glazko ,  Matthias Brehler ,  Je Woo Kim ,  Mahesh Makhijani

Inventor： Serguei A. Glazko ,  Matthias Brehler ,  Je Woo Kim ,  Mahesh Makhijani

IPC: H04K1/10 ,  H04W72/00

CPC classification number: H04W72/1231 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0053 ,  H04W72/1273

Abstract: Methods and apparatus are provided for increasing throughput in a wireless communication system by reducing the amount of overhead transmitted to certain user terminals. Overhead due to control information may be reduced for these certain user terminals by selecting a low repetition factor. Overhead may be further reduced for these certain user terminals by selecting a modulation/coding scheme with a higher data rate for transmitting the control information. The selection may be based on channel conditions associated with the user terminals, such as signal-to-interference-plus-noise ratios (SINRs).

Abstract translation: 提供了通过减少传送到某些用户终端的开销量来提高无线通信系统中的吞吐量的方法和装置。 通过选择低重复因子，可能会降低这些特定用户终端由于控制信息而导致的开销。 通过选择具有较高数据速率的调制/编码方案来传送控制信息，可以进一步减少这些特定用户终端的开销。 选择可以基于与用户终端相关联的信道条件，例如信号与干扰加噪声比（SINR）。