公开(公告)号：US20070184806A1

公开(公告)日：2007-08-09

申请号：US11715212

申请日：2007-03-07

申请人： Baoguo Yang ,  Nelson Sollenberger

发明人： Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H04B1/10 ,  H04B1/16

CPC分类号： H04B1/1027

摘要： A method to perform adaptive channel filtering on a Radio Frequency (RF) bursts in a cellular wireless communication system. This method first filters an input signal with a first stage filter having a first bandwidth to produce a first stage output signal. Then the first stage output signal is filtered with a second stage filter having a second bandwidth narrower than that of the first stage filter to produce a multi-stage output signal. A comparison between first stage performance measurements and multi-stage performance measurements determine the mode of operation of the adaptive multistage filter. A first mode of operation, selected when the first stage performance measurement compares favorably with the second stage performance measurement, selects the output of the first stage filter as the output of the multi-stage filter. Otherwise, a second mode of operation selects the output of the second stage filter as the output of the multi-stage filter.

摘要翻译： 一种在蜂窝无线通信系统中对射频（RF）突发执行自适应信道滤波的方法。 该方法首先用具有第一带宽的第一级滤波器对输入信号进行滤波以产生第一级输出信号。 然后第一级输出信号用具有比第一级滤波器窄的第二带宽的第二级滤波器滤波，以产生多级输出信号。 第一阶段性能测量和多级性能测量之间的比较确定了自适应多级滤波器的工作模式。 当第一级性能测量与第二级性能测量相比较时选择的第一操作模式选择第一级滤波器的输出作为多级滤波器的输出。 否则，第二操作模式选择第二级滤波器的输出作为多级滤波器的输出。

公开(公告)号：US20060209765A1

公开(公告)日：2006-09-21

申请号：US11380531

申请日：2006-04-27

申请人： Ye LI ,  Nelson Sollenberger ,  Jack Winters

发明人： Ye LI ,  Nelson Sollenberger ,  Jack Winters

IPC分类号： H04Q7/00

CPC分类号： H04L27/2601 ,  H04L1/0618

摘要： A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.

摘要翻译： MIMO OFDM系统包括用于对具有独立时空码的各个数据块进行编码的多个时空编码器。 经变换的数据块信号由多个发射天线发射并由多个接收天线接收。 接收的数据在最大似然检测之前被预先白化。 在一个实施例中，可以起诉连续的干扰消除以改善系统性能。 可以通过基于偏离平均值的信道脉冲响应估计来加权信道参数估计。

公开(公告)号：US20060198362A1

公开(公告)日：2006-09-07

申请号：US11150957

申请日：2005-06-13

申请人： Arkady Molev-Shteiman ,  Nelson Sollenberger ,  Huaiyu (Hanks) Zeng

发明人： Arkady Molev-Shteiman ,  Nelson Sollenberger ,  Huaiyu (Hanks) Zeng

IPC分类号： H04Q7/00 ,  H04Q7/24 ,  H04L12/66 ,  H04B1/713 ,  H04B1/707 ,  H04J3/16 ,  H04B1/69 ,  H04J3/22

CPC分类号： H04L25/03038 ,  H04L25/0224 ,  H04L25/0305 ,  H04L25/03178 ,  H04L2025/03401

摘要： The present invention provides a method of processing radio frequency (RF) bursts dependent on a speech mode associated with data contained within the RF burst. Different voice modes, full rate, half rate, and adaptive multi-channel rates each may require different signal to noise ratio (SNR) conditions in order to be successfully processed. To improve the equalization of the received RF burst(s), the SNR associated with the burst is estimated. Then based on the SNR or other related conditions (i.e. the presence or absence of colored noise, and the estimated channel profile) a decision can be made as to whether or not an interference cancellation burst process should be implemented. For example, the presence of colored noise may indicate the presence of interference requiring the cancellation of such interference, the channel profile as described by the channel length and other associated properties may help determine when an interference cancellation process should be utilized as well, and if there is insufficient SNR, i.e. the SNR is below the predetermined threshold, all indicate that it may be desirable to implement interference cancellation to improve the processing of the received burst(s).

摘要翻译： 本发明提供了一种处理与RF数据中包含的数据相关联的语音模式的射频（RF）突发的方法。 不同的语音模式，全速率，半速率和自适应多信道速率各自可能需要不同的信噪比（SNR）条件才能被成功处理。 为了改善所接收的RF突发的均衡，估计与突发相关联的SNR。 然后基于SNR或其他相关条件（即有色噪声的存在或不存在以及估计的信道简档），可以做出关于是否应该实现干扰消除突发处理的决定。 例如，有色噪声的存在可以指示需要消除这种干扰的干扰的存在，由信道长度和其他相关属性描述的信道简档可以帮助确定什么时候还应该使用干扰消除过程，并且如果 SNR不足，即SNR低于预定阈值，都表示可能希望实现干扰消除以改善接收到的突发的处理。

公开(公告)号：US20050259569A1

公开(公告)日：2005-11-24

申请号：US11190308

申请日：2005-07-26

申请人： Leonard Cimini ,  Nelson Sollenberger

发明人： Leonard Cimini ,  Nelson Sollenberger

IPC分类号： H04L27/26 ,  H04J11/00

CPC分类号： H04L27/2615 ,  H04B1/06 ,  H04L27/2601 ,  H04L27/2621 ,  H04L27/2626 ,  H04L27/2647

摘要： An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.

摘要翻译： OFDM系统在传输信号中嵌入序列信息，降低峰值平均功率比（PAP），对整个系统的效率影响最小。 标记被嵌入到用于识别接收机上的组合（反转）序列的所发送的信息上。 在一个实施例中，当对应的相位因子旋转群集时，群集中的所选音调被旋转。

公开(公告)号：US09286900B2

公开(公告)日：2016-03-15

申请号：US13052349

申请日：2011-03-21

申请人： Hongwei Kong ,  Nelson Sollenberger ,  Li Fung Chang ,  Claude Hayek ,  Taiyi Cheng

发明人： Hongwei Kong ,  Nelson Sollenberger ,  Li Fung Chang ,  Claude Hayek ,  Taiyi Cheng

IPC分类号： G10L19/00 ,  H04J3/22

CPC分类号： G10L19/00

摘要： An audio codec in a baseband processor may be utilized for mixing audio signals received at a plurality of data sampling rates. The mixed audio signals may be up sampled to a very large sampling rate, and then down sampled to a specified sampling rate that is compatible with a Bluetooth-enabled device by utilizing an interpolator in the audio codec. The down-sampled signals may be communicated to Bluetooth-enabled devices, such as Bluetooth headsets, or Bluetooth-enabled devices with a USB interface. The interpolator may be a linear interpolator for which the audio codec may enable generation of triggering and/or coefficient signals based on the specified output sampling rate. An interpolation coefficient may be generated based on a base value associated with the specified output sampling rate. The audio codec may enable selecting the specified output sampling rate from a plurality of rates.

摘要翻译： 基带处理器中的音频编解码器可用于混合以多个数据采样率接收的音频信号。 混合音频信号可以被上采样到非常大的采样率，然后通过利用音频编解码器中的内插器而被下采样到与启用蓝牙的设备兼容的指定采样率。 下采样信号可以传送到具有USB接口的支持蓝牙的设备，例如蓝牙耳机或具有蓝牙功能的设备。 内插器可以是线性内插器，其中音频编解码器可以基于指定的输出采样率来实现触发和/或系数信号的产生。 可以基于与指定的输出采样率相关联的基值产生内插系数。 音频编解码器可以允许从多个速率中选择指定的输出采样率。

公开(公告)号：US08965757B2

公开(公告)日：2015-02-24

申请号：US13295818

申请日：2011-11-14

申请人： Jes Thyssen ,  Huaiyu Zeng ,  Juin-Hwey Chen ,  Nelson Sollenberger ,  Xianxian Zhang

发明人： Jes Thyssen ,  Huaiyu Zeng ,  Juin-Hwey Chen ,  Nelson Sollenberger ,  Xianxian Zhang

IPC分类号： G10L21/02 ,  G10L21/0208 ,  G10L21/0272 ,  H04R1/24 ,  G10L21/0216

CPC分类号： G10L21/0208 ,  G10L21/0272 ,  G10L2021/02165 ,  H04R1/245 ,  H04R2410/07

摘要： Multi-channel noise suppression systems and methods are described that omit the traditional delay-and-sum fixed beamformer in devices that include a primary speech microphone and at least one noise reference microphone with the desired speech being in the near-field of the device. The multi-channel noise suppression systems and methods use a blocking matrix (BM) to remove desired speech in the input speech signal received by the noise reference microphone to get a “cleaner” background noise component. Then, an adaptive noise canceler (ANC) is used to remove the background noise in the input speech signal received by the primary speech microphone based on the “cleaner” background noise component to achieve noise suppression. The filters implemented by the BM and ANC are derived using closed-form solutions that require calculation of time-varying statistics of complex frequency domain signals in the noise suppression system.

摘要翻译： 描述了多通道噪声抑制系统和方法，其省略了传统的延迟和总和固定波束形成器，其包括主话音麦克风和至少一个噪声参考麦克风，其中所需语音位于设备的近场。 多声道噪声抑制系统和方法使用阻塞矩阵（BM）去除由噪声参考麦克风接收的输入语音信号中的期望语音以获得“更干净”的背景噪声分量。 然后，使用自适应噪声消除器（ANC）来基于“更干净的”背景噪声分量来消除由主话音麦克风接收的输入语音信号中的背景噪声，以实现噪声抑制。 由BM和ANC实现的滤波器是使用需要在噪声抑制系统中计算复杂频域信号的时变统计的闭式解决方案导出的。

公开(公告)号：US08843094B2

公开(公告)日：2014-09-23

申请号：US12853131

申请日：2010-08-09

申请人： Walid Ahmed ,  John Leung ,  Theodoros Georgantas ,  Morten Damgaard ,  Nelson Sollenberger

发明人： Walid Ahmed ,  John Leung ,  Theodoros Georgantas ,  Morten Damgaard ,  Nelson Sollenberger

IPC分类号： H04B1/06 ,  H04B7/00 ,  H04W52/24 ,  H04W52/52 ,  H04B17/00

CPC分类号： H04W52/52 ,  H04B17/318 ,  H04W52/245 ,  H04W52/246

摘要： Aspects of a method and system for integrated blocker detection and automatic gain control are provided. In this regard, a communication device may generate one or more first signal strength indications based on a strength of a received signal at a first point in the analog front-end of the communication device. The communication device may generate one or more second signal strength indications based on a strength of the received signal at a second point in a digital processing module of the communication device. The first point in the analog front-end may be an input or an output of a down-conversion mixer. The second point in the digital processing module may be an output of an analog-to-digital converter or an output of a channel selection filter. The communication device may control, utilizing the first signal strength indication(s) and the second signal strength indication(s), a gain of one or more components of the communication device.

摘要翻译： 提供了一种用于集成阻断检测和自动增益控制的方法和系统的方面。 在这方面，通信设备可以基于在通信设备的模拟前端的第一点处的接收信号的强度来产生一个或多个第一信号强度指示。 通信设备可以基于通信设备的数字处理模块中的第二点处的接收信号的强度来生成一个或多个第二信号强度指示。 模拟前端的第一点可以是下变频混频器的输入或输出。 数字处理模块中的第二点可以是模数转换器的输出或通道选择滤波器的输出。 通信设备可以利用第一信号强度指示和第二信号强度指示来控制通信设备的一个或多个组件的增益。

公开(公告)号：US08811602B2

公开(公告)日：2014-08-19

申请号：US13174148

申请日：2011-06-30

申请人： Prakash Khanduri ,  Nelson Sollenberger ,  Huaiyu Zeng

发明人： Prakash Khanduri ,  Nelson Sollenberger ,  Huaiyu Zeng

IPC分类号： H04M9/08 ,  H04B3/20

CPC分类号： H04M9/082

摘要： A telecommunication system including a fall duplex speakerphone, comprising a first microphone to generate a coupled signal including uplink information and non-linear distortion sensed by the first microphone in a speaker phone mode, a second microphone to generate a reference signal including downlink information and the non-linear distortion sensed by the second microphone in the speaker phone mode, and an acoustic echo canceller (AEC) to receive the coupled signal from the first microphone, to receive the reference signal from the second microphone, and to cancel out the non-linear distortion included in the coupled signal based on the non-linear distortion included in the reference signal.

摘要翻译： 一种包括秋季双工免提电话的电信系统，包括：第一麦克风，用于产生包括在扬声器电话模式中由所述第一麦克风感测的上行链路信息和非线性失真的耦合信号;第二麦克风，用于生成包括下行链路信息的参考信号;以及 在扬声器电话模式下由第二麦克风感测到的非线性失真，以及声学回声消除器（AEC），用于接收来自第一麦克风的耦合信号，以接收来自第二麦克风的参考信号， 基于参考信号中包含的非线性失真，包含在耦合信号中的线性失真。

公开(公告)号：US08687797B2

公开(公告)日：2014-04-01

申请号：US12474065

申请日：2009-05-28

申请人： Hanks Zeng ,  Prakash Khanduri ,  Ken Kasiske ,  Ronish Patel ,  Nelson Sollenberger

发明人： Hanks Zeng ,  Prakash Khanduri ,  Ken Kasiske ,  Ronish Patel ,  Nelson Sollenberger

IPC分类号： H04M9/08

CPC分类号： H04M9/082

摘要： Methods and systems for a dual echo canceller (EC) are disclosed and may include cancelling echo in utilizing a dual echo canceller, wherein said dual echo canceller includes an active echo canceller and an adaptive echo canceller. Filter coefficients may be copied from the adaptive echo canceller to the active echo canceller for the cancellation, based on whether said adaptive echo canceller has converged. The coefficients may be copied utilizing copy logic, which may comprise divergence detection and/or echo path change detection. The coefficients may be reset to default settings utilizing the copy logic. The coefficients may be calculated utilizing normalized block least mean squares (NBLMS), and may be calculated when the NBLMS is enabled by update logic. The coefficients may be calculated utilizing linear predictive coefficient (LPC) filtered uplink and downlink signals.

摘要翻译： 公开了用于双回波消除器（EC）的方法和系统，并且可以包括利用双回波消除器来消除回波，其中所述双回波消除器包括主动回波消除器和自适应回波消除器。 基于所述自适应回波消除器是否收敛，可以将滤波器系数从自适应回波消除器复制到用于消除的有源回波消除器。 可以利用可能包括发散检测和/或回波路径变化检测的复制逻辑来复制系数。 使用复制逻辑可以将系数重置为默认设置。 可以使用归一化块最小均方（NBLMS）来计算系数，并且可以在更新逻辑启用NBLMS时计算系数。 可以使用线性预测系数（LPC）滤波的上行链路和下行链路信号来计算系数。

公开(公告)号：US08670509B2

公开(公告)日：2014-03-11

申请号：US13433683

申请日：2012-03-29

申请人： Nelson Sollenberger ,  Rami Mehio ,  Wei Luo ,  Severine Catreux ,  Sean Truong ,  Oghenekome Oteri

发明人： Nelson Sollenberger ,  Rami Mehio ,  Wei Luo ,  Severine Catreux ,  Sean Truong ,  Oghenekome Oteri

IPC分类号： H03D1/04

CPC分类号： H04W56/002 ,  H03M13/3723 ,  H03M13/3905 ,  H03M13/3972 ,  H04L1/005 ,  H04W36/18

摘要： Adaptive path selection for interference cancellation is provided for wireless communication devices. Signal strength metrics are obtained for each of multiple signal paths. One or more of the signal paths are selected as cancellation candidates in response to determining that the signal paths are associated with a strong interfering path based at least in part on the signal strength metrics for the signal paths and threshold criteria. Cancellation is enabled for an estimated signal generated using the signal paths in response to the signal paths being selected as cancellation candidates.

摘要翻译： 为无线通信设备提供干扰消除的自适应路径选择。 对于多个信号路径中的每一个获得信号强度度量。 响应于至少部分地基于信号路径的信号强度度量和阈值标准确定信号路径与强干扰路径相关联，将一个或多个信号路径选择为抵消候选。 响应于被选择作为取消候选的信号路径，对使用信号路径产生的估计信号进行取消。