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    • 84. 发明授权
    • Method and system for dynamic range control in an audio processing system
    • 音频处理系统中动态范围控制的方法和系统
    • US08626516B2
    • 2014-01-07
    • US12367854
    • 2009-02-09
    • Hanks ZengPrakash KhanduriKen KasiskeRonish PatelNelson Sollenberger
    • Hanks ZengPrakash KhanduriKen KasiskeRonish PatelNelson Sollenberger
    • G10L19/00G10L21/00
    • H04R3/00H03G9/025H04R2430/03
    • Methods and systems for dynamic range control in an audio processing system are disclosed and may include controlling a dynamic range of an audio signal by expanding the dynamic range utilizing a dynamic expander, and dividing the audio signal into a plurality of frequency bands. Each of the bands may be individually compressed utilizing a multi-band compressor. A sum of the individually compressed frequency bands may be compressed utilizing a full-band compressor. The audio signal may be filtered utilizing a pre-emphasis filter, such as an infinite impulse response filter and may be divided into frequency bands utilizing one or more finite impulse response filters and/or delay modules. The dynamic expander may include adaptive thresholds and an envelope detector. Each of the frequency bands may be compressed utilizing syllabic compression in the multi-band compressor. The compressed sum of compressed plurality of bands may be processed utilizing an audio CODEC.
    • 公开了用于音频处理系统中的动态范围控制的方法和系统,并且可以包括通过使用动态扩展器扩展动态范围并且将音频信号划分成多个频带来控制音频信号的动态范围。 可以使用多频带压缩机来单独压缩每个频带。 可以使用全频带压缩器压缩单独压缩的频带的总和。 可以使用诸如无限脉冲响应滤波器的预加重滤波器来对音频信号进行滤波,并且可以使用一个或多个有限脉冲响应滤波器和/或延迟模块将音频信号分成频带。 动态扩展器可以包括自适应阈值和包络检测器。 可以在多频带压缩器中使用音节压缩来压缩每个频带。 可以使用音频CODEC来处理压缩的多个频带的压缩和。
    • 85. 发明授权
    • Method and system for interference suppression in WCDMA systems
    • WCDMA系统干扰抑制方法与系统
    • US08503506B2
    • 2013-08-06
    • US13588297
    • 2012-08-17
    • Mark HahmWei LuoArkady Molev-ShteimanHongwei KongXiao-Feng QiLi Fung ChangNelson Sollenberger
    • Mark HahmWei LuoArkady Molev-ShteimanHongwei KongXiao-Feng QiLi Fung ChangNelson Sollenberger
    • H04B1/707
    • H04B1/712H04J11/0063H04J13/0044H04J13/0048
    • Aspects of a method and system for interference suppression in WCDMA systems may include one or more circuits that are operable to receive a plurality of multipath signals via one or more receiving antennas. A plurality of weighting factor values may be computed based on the received multipath signals. Estimated signals may be based on the weighting factor values. Residual signals may be generated based on received signals and the estimated signals. Addback signals may be generated based on the estimated signals and the residual signals. Updated estimated signals may be generated based on the addback signals and the weighting factor values. Incremental signals may be generated based on the updated estimated signals and addback signals. Updated residual signals may be generated based on the incremental signals and previous residual signals. The interference suppressed signals may be generated based on the updated residual signals and updated estimated signals.
    • 用于WCDMA系统中的干扰抑制的方法和系统的方面可以包括可操作以经由一个或多个接收天线接收多个多径信号的一个或多个电路。 可以基于接收的多路径信号来计算多个加权因子值。 估计信号可以基于加权因子值。 可以基于接收的信号和估计的信号来产生残余信号。 可以基于估计的信号和残留信号来生成附加信号。 可以基于附加信号和加权因子值来生成更新的估计信号。 可以基于更新的估计信号和加法信号来产生增量信号。 可以基于增量信号和先前的剩余信号来生成更新的残留信号。 可以基于更新的残差信号和更新的估计信号来产生干扰抑制信号。
    • 88. 发明授权
    • Method and system for an adaptive automatic gain control (AGC) reference for HSDPA and WCDMA
    • 用于HSDPA和WCDMA的自适应自动增益控制(AGC)参考的方法和系统
    • US08218684B2
    • 2012-07-10
    • US12260669
    • 2008-10-29
    • Li Fung ChangNelson SollenbergerAbhinav Prasad
    • Li Fung ChangNelson SollenbergerAbhinav Prasad
    • H04L27/00
    • H03G3/005H03G3/3052H04J13/0044
    • In a method and system for an adaptive automatic gain control (AGC) reference for HSDPA and WCDMA, A RF receiver, comprising a RF front-end, may receive a signal comprising a pilot signal via WCDMA or HSDPA. The operation mode of the RF front-end of the RF receiver may be determined based on the received signal components such as a HS-PDCH, a HS-SCCH, and/or a CPICH. The received signal strength information (RSSI) of the received signal may be determined from the output of a matched filter within the RF receiver. A true RSSI, which may be indicated by the received signal code power (RSCP), may be determined based on the pilot symbols over the CPICH. The operation mode determined for the receiver's RF front-end, the determined RSSI, and the determined CPICH_RSCP, may be provided as inputs to an automatic-gain-control (AGC) loop or circuit within the receiver front-end.
    • 在用于HSDPA和WCDMA的自适应自动增益控制(AGC)参考的方法和系统中,包括RF前端的RF接收机可以经由WCDMA或HSDPA接收包括导频信号的信号。 可以基于诸如HS-PDCH,HS-SCCH和/或CPICH的接收信号分量来确定RF接收机的RF前端的操作模式。 接收信号的接收信号强度信息(RSSI)可以根据RF接收机内的匹配滤波器的输出来确定。 可以由接收信号码功率(RSCP)指示的真实RSSI可以基于CPICH上的导频符号来确定。 为接收机的RF前端确定的操作模式,所确定的RSSI和确定的CPICH_RSCP可以被提供为接收机前端内的自动增益控制(AGC)回路或电路的输入。
    • 89. 发明申请
    • METHOD AND SYSTEM FOR BLOCKER DETECTON AND AUTOMATIC GAIN CONTROL
    • 阻塞检测方法与系统及自动增益控制
    • US20120004005A1
    • 2012-01-05
    • US12853131
    • 2010-08-09
    • Walid AhmedJohn LeungTheodoros GeorgantasMorten DamgaardNelson Sollenberger
    • Walid AhmedJohn LeungTheodoros GeorgantasMorten DamgaardNelson Sollenberger
    • H04B7/00
    • H04W52/52H04B17/318H04W52/245H04W52/246
    • 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.
    • 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。
    • 90. 发明申请
    • METHOD AND SYSTEM FOR A DUAL ECHO CANCELLER
    • 一种双重收音机的方法与系统
    • US20100303228A1
    • 2010-12-02
    • US12474065
    • 2009-05-28
    • Hanks ZengPrakash KhanduriKen KasiskeRonish PatelNelson Sollenberger
    • Hanks ZengPrakash KhanduriKen KasiskeRonish PatelNelson Sollenberger
    • H04M9/08
    • H04M9/082
    • 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.
    • 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效回波消除器。 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。