公开(公告)号：US08559948B2

公开(公告)日：2013-10-15

申请号：US12211952

申请日：2008-09-17

Applicant: Tom Chin ,  Ayman Fawzy Naguib ,  Guangming Carl Shi ,  Matthias Brehler ,  Serguei A. Glazko

Inventor： Tom Chin ,  Ayman Fawzy Naguib ,  Guangming Carl Shi ,  Matthias Brehler ,  Serguei A. Glazko

IPC: H04W4/00

CPC classification number: H04W48/16 ,  H04W88/06

Abstract: Certain embodiments of the present disclosure provide a method for scanning for paging messages in a second radio access technology (RAT) network, such as a CDMA network, while connected to a first RAT network, such as a WiMAX network. For certain embodiments, an enhanced scanning request message may facilitate establishing a scanning cycle in the first RAT that aligns with a paging cycle of the second RAT.

Abstract translation: 本公开的某些实施例提供了一种用于在诸如CDMA网络的第二无线电接入技术（RAT）网络中扫描寻呼消息的方法，同时连接到诸如WiMAX网络的第一RAT网络。 对于某些实施例，增强的扫描请求消息可以有助于建立与第二RAT的寻呼周期对准的第一RAT中的扫描周期。

公开(公告)号：US08229013B2

公开(公告)日：2012-07-24

申请号：US12211928

申请日：2008-09-17

Applicant: Jong Hyeon Park ,  Allert van Zelst ,  Brian Clarke Banister ,  Je Woo Kim ,  Matthias Brehler ,  Vincent K. Jones, IV

Inventor： Jong Hyeon Park ,  Allert van Zelst ,  Brian Clarke Banister ,  Je Woo Kim ,  Matthias Brehler ,  Vincent K. Jones, IV

IPC: H04L5/12 ,  H03D1/00

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

Abstract: A “post-squaring” detection algorithm, and related devices, that may reduce the complexity of maximum likelihood detection (MLD) schemes while preserving their performance is provided. Rather than search for optimum metrics (such as minimum distance metrics) based on squared norm values, a search may be based on un-squared norm metrics, and the squaring may be postponed, for example, until subsequent log-likelihood ratio (LLR) computation. For certain embodiments, approximations of un-squared norm values may significantly reduce computation complexity.

Abstract translation: 提供了可以降低最大似然检测（MLD）方案的复杂性同时保持其性能的“后置”检测算法和相关设备。 搜索可以基于平方范数，而不是基于平方范数搜索最佳度量（例如最小距离度量），并且可以延迟平方，例如直到后续的对数似然比（LLR） 计算。 对于某些实施例，非平方范数值的近似可以显着降低计算复杂度。

公开(公告)号：US08155254B2

公开(公告)日：2012-04-10

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: H03D1/04

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：US20050232199A1

公开(公告)日：2005-10-20

申请号：US11097877

申请日：2005-04-01

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

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

IPC: H04B7/02 ,  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：US20050221847A1

公开(公告)日：2005-10-06

申请号：US10816991

申请日：2004-04-01

Applicant: Matthias Brehler ,  Arthur Neufeld ,  Jing Liu ,  John May ,  Kurt Otte

Inventor： Matthias Brehler ,  Arthur Neufeld ,  Jing Liu ,  John May ,  Kurt Otte

IPC: H04B1/16 ,  H04M1/73 ,  H04W52/02 ,  H04B15/00

CPC classification number: H04W52/0287 ,  Y02D70/00

Abstract: A method for correcting operation of the sleep oscillator (116) of a wireless communications device (100). Sleep oscillator frequency is estimated (412) so as to compensate for estimated temperature induced errors. In estimating temperature induced errors, errors (504) in sleep oscillator frequency are treated as being temperature induced errors (522), but probable multipath errors are bounded (410, 520) to predetermined sleep clock error maxima (602) corresponding to sleep duration over which the error occurred.

Abstract translation: 一种用于校正无线通信设备（100）的睡眠振荡器（116）的操作的方法。 估计睡眠振荡器频率（412），以补偿估计的温度引起的误差。 在估计温度诱导误差时，睡眠振荡器频率中的误差（504）被视为温度诱导误差（522），但是可能的多路径误差被限制（410,520）到对应于睡眠持续时间的预定睡眠时钟误差最大值（602） 发生错误。

公开(公告)号：US08576931B2

公开(公告)日：2013-11-05

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: H04L27/28

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）。

公开(公告)号：US20110312353A1

公开(公告)日：2011-12-22

申请号：US13164572

申请日：2011-06-20

Applicant: Brian Clarke Banister ,  Matthias Brehler ,  Peter Gaal ,  Masato Kitazoe ,  Kapil Bhattad

Inventor： Brian Clarke Banister ,  Matthias Brehler ,  Peter Gaal ,  Masato Kitazoe ,  Kapil Bhattad

IPC: H04W88/00

CPC classification number: H04W24/08 ,  H04B7/0608 ,  H04B7/0691 ,  H04W72/042 ,  H04W72/046 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/444

Abstract: Certain aspects of the present disclosure provide techniques for wireless communications, wherein first number of transit antennas is advertised, but a different number of transmit antennas are actually used for transmission.

Abstract translation: 本公开的某些方面提供了用于无线通信的技术，其中通告了第一数量的传输天线，但实际上使用不同数量的发射天线进行传输。

公开(公告)号：US20110158342A1

公开(公告)日：2011-06-30

申请号：US12825132

申请日：2010-06-28

Applicant: Shivratna G. Srinivasan ,  Michael L. McCloud ,  Matthias Brehler ,  Brian Clarke Banister

Inventor： Shivratna G. Srinivasan ,  Michael L. McCloud ,  Matthias Brehler ,  Brian Clarke Banister

IPC: H04B15/00

CPC classification number: H04L27/2662 ,  H04L25/0212 ,  H04L27/2665

Abstract: Techniques for performing time tracking in a communication system utilizing a cyclic prefix are described. In an aspect, a receiver may perform time tracking and determine an FFT window position based on a metric related to inter-symbol interference (ISI) and inter-carrier interference (ICI). The receiver may determine an early energy for signal paths earlier than the current FFT window position, determine a late energy for signal paths later than the current FFT window position, determine the metric based on the early and late energies, compute an update amount for the FFT window position based on the metric, and update the FFT window position based on the update amount with a time tracking loop (TTL). In yet another aspect, the receiver may compute the FFT window position based on a channel impulse response (CIR) estimate directly, without using a TTL.

Abstract translation: 描述了在利用循环前缀的通信系统中执行时间跟踪的技术。 在一方面，接收机可以执行时间跟踪，并且基于与符号间干扰（ISI）和载波间干扰（ICI）相关的度量来确定FFT窗口位置。 接收机可以在比当前FFT窗口位置更早的时间确定信号路径的早期能量，确定晚于当前FFT窗口位置的信号路径的延迟能量，基于早期和晚期能量来确定度量，计算更新量 基于度量的FFT窗口位置，并使用时间跟踪循环（TTL）更新基于更新量的FFT窗口位置。 在另一方面，接收机可以直接地计算基于信道脉冲响应（CIR）估计的FFT窗口位置，而不使用TTL。

公开(公告)号：US20090316840A1

公开(公告)日：2009-12-24

申请号：US12211935

申请日：2008-09-17

Applicant: Jong Hyeon Park ,  Brian Clark Banister ,  Inyup Kang ,  Je Woo Kim ,  James Y. Hurt ,  Matthias Brehler

Inventor： Jong Hyeon Park ,  Brian Clark Banister ,  Inyup Kang ,  Je Woo Kim ,  James Y. Hurt ,  Matthias Brehler

IPC: H04L27/06

CPC classification number: H04L1/0631 ,  H04L1/0662

Abstract: Space time coding (STC) may be applied at the transmitter adding redundant information in both space and time dimensions. At the receiver, the received STC signal may be decoded using a spatial multiplexing MIMO decoding, for example, based on either Minimum Mean Square Error (MMSE) or maximum-likelihood (ML) algorithms. A selective STC decoder may incorporate both the conventional maximum ratio combining (MRC) decoding scheme and a MIMO decoding scheme. One of the STC decoding schemes may be selected, for example, based on estimated channel conditions in order to achieve a trade-off between error rate performance and computational complexity. Components used for a non-selected scheme may be powered down.

Abstract translation: 空间时间编码（STC）可以在发射机上应用于空间和时间维度上的冗余信息。 在接收机处，可以使用例如基于最小均方误差（MMSE）或最大似然（ML）算法的空间复用MIMO解码来解码所接收的STC信号。 选择性STC解码器可以并入传统的最大比组合（MRC）解码方案和MIMO解码方案。 可以例如基于估计的信道条件来选择STC解码方案之一，以便实现错误率性能和计算复杂度之间的权衡。 用于未选择方案的组件可能会关闭电源。

公开(公告)号：US20080219332A1

公开(公告)日：2008-09-11

申请号：US11777263

申请日：2007-07-12

Applicant: Matthias Brehler

Inventor： Matthias Brehler

IPC: H04B7/02 ,  H04B1/38 ,  H04J11/00

CPC classification number: H03G3/3078 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2647

Abstract: Apparatus and methods are provided for accounting for the effects of automatic gain control (AGC) in a multi carrier communications system when combining pilot tone interlaces by essentially reversing the effects of the AGC. In an aspect, a method for adjusting for the effects of automatic gain control when combining pilot interlaces in an interlace filter of a communication system is disclosed. The method includes determining a normalization gain of an applied automatic gain control normalized to a predefined time. Additionally, two or more combining coefficients for an interlace filter are determined based on a selected criterion. Each of the two or more combining coefficients is then modified based on the determined normalization gain to yield adjusted combining coefficients. Corresponding apparatus are also disclosed.

Abstract translation: 提供装置和方法，用于在通过基本上反转AGC的效果来组合导频音调交错时考虑多载波通信系统中的自动增益控制（AGC）的影响。 在一方面，公开了一种在通信系统的交错滤波器中组合导频交错时调整自动增益控制的效果的方法。 该方法包括确定归一化到预定时间的所施加的自动增益控制的归一化增益。 另外，基于所选择的标准来确定隔行扫描器的两个或更多个组合系数。 然后基于所确定的归一化增益修改两个或更多个组合系数中的每一个，以产生调整的组合系数。 还公开了相应的装置。