公开(公告)号：US20090304100A1

公开(公告)日：2009-12-10

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: 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：US20090279517A1

公开(公告)日：2009-11-12

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: H04W74/00

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：US09071493B2

公开(公告)日：2015-06-30

申请号：US12824958

申请日：2010-06-28

Applicant: Brian C. Banister ,  Shivratna G. Srinivasan ,  Matthias Brehler ,  Sunil Kumar Kandukuri Narayana ,  Raghu N. Challa

Inventor： Brian C. Banister ,  Shivratna G. Srinivasan ,  Matthias Brehler ,  Sunil Kumar Kandukuri Narayana ,  Raghu N. Challa

IPC: H03D3/24 ,  H04L27/26 ,  H03J1/00 ,  H04L27/00

CPC classification number: H04L27/2657 ,  H03J1/005 ,  H04L2027/0055 ,  H04L2027/0065 ,  H04L2027/0067

Abstract: Methods and apparatus for correcting frequency errors between a carrier frequency of a signal received by a wireless device and a reference frequency local to the device. For certain aspects, such a method generally includes receiving a signal in a receiver having an LO producing a reference frequency, a radio frequency (RF) phase-locked loop (PLL), and a digital rotator, estimating a frequency difference between a carrier frequency of the received signal and the LO reference frequency, and applying the estimated frequency difference to the RF PLL and the digital rotator.

Abstract translation: 用于校正由无线设备接收的信号的载波频率与设备本地的参考频率之间的频率误差的方法和装置。 对于某些方面，这种方法通常包括在具有产生参考频率的LO的接收机中接收信号，射频（RF）锁相环（PLL）和数字旋转器，估计载波频率 的接收信号和LO参考频率，并将估计的频差应用于RF PLL和数字旋转器。

公开(公告)号：US08989061B2

公开(公告)日：2015-03-24

申请号：US12796009

申请日：2010-06-08

Applicant: Remi J. Gurski ,  Matthias Brehler ,  Raghu N. Challa

Inventor： Remi J. Gurski ,  Matthias Brehler ,  Raghu N. Challa

IPC: H04J3/00 ,  H03G3/30 ,  H04B1/7073 ,  H04B1/708

CPC classification number: H03G3/3078 ,  H03G3/3042 ,  H03G3/3052 ,  H04B1/70735 ,  H04B1/708

Abstract: A plurality of predetermined amplifier gain states for a low noise amplifier (LNA) are run during initial acquisition in a time division duplex (TDD) system. Acquisition of a received signal is determined based on searching across the plurality of predetermined amplifier gain states. Forcing the amplifier gain into a set of predetermined gain states affords quicker resolution of initial acquisition for setting the gain of the LNA, which in TDD systems is complicated due to an uncertain uplink/downlink timeline that precludes continuous operation of a gain setting algorithm run in the LNA.

Abstract translation: 在时分双工（TDD）系统的初始采集期间，运行低噪声放大器（LNA）的多个预定的放大器增益状态。 基于在多个预定的放大器增益状态中搜索来确定接收信号的获取。 将放大器增益强制为一组预定增益状态可以提供更快的初始采集分辨率，用于设置LNA的增益，由于不确定的上行链路/下行链路时间轴，TDD系统复杂，导致增加设置算法持续运行， LNA。

公开(公告)号：US08923424B2

公开(公告)日：2014-12-30

申请号：US12711128

申请日：2010-02-23

Applicant: Michael L. McCloud ,  Matthias Brehler ,  Ju Won Park ,  Jong Hyeon Park ,  Je Woo Kim ,  Inyup Kang ,  Brian C. Banister

Inventor： Michael L. McCloud ,  Matthias Brehler ,  Ju Won Park ,  Jong Hyeon Park ,  Je Woo Kim ,  Inyup Kang ,  Brian C. Banister

IPC: H04B7/02 ,  H04L25/03 ,  H04B7/04

CPC classification number: H04L25/03229 ,  H04B7/0413 ,  H04L25/03242 ,  H04L25/03318 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.

Abstract translation: 本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。 作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。 在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。 在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。 根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。 这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。

公开(公告)号：US08726138B2

公开(公告)日：2014-05-13

申请号：US12250169

申请日：2008-10-13

Applicant: Ju Won Park ,  Brian Banister ,  Je Woo Kim ,  Jong Hyeon Park ,  Matthias Brehler ,  Remi Gurski ,  Tae Chang

Inventor： Ju Won Park ,  Brian Banister ,  Je Woo Kim ,  Jong Hyeon Park ,  Matthias Brehler ,  Remi Gurski ,  Tae Chang

IPC: H03M13/00

CPC classification number: H03M13/413 ,  H03M13/3723 ,  H03M13/3955 ,  H03M13/3972 ,  H03M13/6544

Abstract: A method and apparatus for decoding of tailbiting convolutional codes (TBCC) are disclosed. The proposed modified maximum-likelihood TBCC decoding technique preserves error correction performance of optimal maximum-likelihood based TBCC decoding, while the computational complexity is substantially decreased since a reduced number of decoding states has been evaluated. Compare to other sub-optimal TBCC decoding algorithms, modified maximum-likelihood TBCC decoding achieves improved packet error rate performance with similar computational complexity.

Abstract translation: 公开了一种用于解码尾部卷积码（TBCC）的方法和装置。 所提出的修改的最大似然TBCC解码技术保留了最佳最大似然度TBCC解码的纠错性能，同时由于已经减少了解码状态数量，所以计算复杂度显着降低。 与其他次优TBCC解码算法相比，修改的最大似然TBCC解码实现了具有类似计算复杂度的改进的分组错误率性能。

公开(公告)号：US08374274B2

公开(公告)日：2013-02-12

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: H04B7/02 ,  H04L1/02

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：US20110206151A1

公开(公告)日：2011-08-25

申请号：US12711128

申请日：2010-02-23

Applicant: Michael L. McCloud ,  Matthias Brehler ,  Ju Won Park ,  Jong Hyeon Park ,  Je Woo Kim ,  Inyup Kang ,  Brian C. Banister

Inventor： Michael L. McCloud ,  Matthias Brehler ,  Ju Won Park ,  Jong Hyeon Park ,  Je Woo Kim ,  Inyup Kang ,  Brian C. Banister

IPC: H04L1/02 ,  H04L27/06

CPC classification number: H04L25/03229 ,  H04B7/0413 ,  H04L25/03242 ,  H04L25/03318 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.

Abstract translation: 本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。 作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。 在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。 在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。 根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。 这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。

公开(公告)号：US20110158367A1

公开(公告)日：2011-06-30

申请号：US12824958

申请日：2010-06-28

Applicant: Brian C. Banister ,  Shivratna G. Srinivasan ,  Matthias Brehler ,  Sunil Kumar Kandukuri Narayana ,  Raghu N. Challa

Inventor： Brian C. Banister ,  Shivratna G. Srinivasan ,  Matthias Brehler ,  Sunil Kumar Kandukuri Narayana ,  Raghu N. Challa

IPC: H03D3/24

CPC classification number: H04L27/2657 ,  H03J1/005 ,  H04L2027/0055 ,  H04L2027/0065 ,  H04L2027/0067

Abstract: Methods and apparatus for correcting frequency errors between a carrier frequency of a signal received by a wireless device and a reference frequency local to the device. For certain aspects, such a method generally includes receiving a signal in a receiver having an LO producing a reference frequency, a radio frequency (RF) phase-locked loop (PLL), and a digital rotator, estimating a frequency difference between a carrier frequency of the received signal and the LO reference frequency, and applying the estimated frequency difference to the RF PLL and the digital rotator.

Abstract translation: 用于校正由无线设备接收的信号的载波频率与设备本地的参考频率之间的频率误差的方法和装置。 对于某些方面，这种方法通常包括在具有产生参考频率的LO的接收机中接收信号，射频（RF）锁相环（PLL）和数字旋转器，估计载波频率 的接收信号和LO参考频率，并将估计的频差应用于RF PLL和数字旋转器。

公开(公告)号：US20100158079A1

公开(公告)日：2010-06-24

申请号：US12337641

申请日：2008-12-18

Applicant: Junqiang Li ,  Je Woo Kim ,  Jong Hyeon Park ,  Matthias Brehler

Inventor： Junqiang Li ,  Je Woo Kim ,  Jong Hyeon Park ,  Matthias Brehler

IPC: H04B1/707

CPC classification number: H04L27/2659 ,  H04J11/0073 ,  H04L27/2675 ,  H04L27/2684

Abstract: Techniques for initial wireless network synchronization by a mobile station are provided. For certain embodiments, the techniques may involve a joint search for the cell identification (ID-cell index) and the coarse carrier frequency offset (CFO) estimation. For certain embodiments, the techniques may be based on hard correlation and binary differential despreading that substantially simplifies computational complexity compare to known techniques that independently search for the ID-cell index and perform CFO estimation.

Abstract translation: 提供了由移动台进行初始无线网络同步的技术。 对于某些实施例，这些技术可以涉及对小区标识（ID-小区索引）和粗略载波频率偏移（CFO）估计的联合搜索。 对于某些实施例，该技术可以基于硬相关和二进制差分解扩，其与独立地搜索ID小区索引并执行CFO估计的已知技术相比基本上简化了计算复杂度。