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1.发明授权公开(公告)号：US07899431B2
公开(公告)日：2011-03-01
申请号：US11099138
申请日：2005-04-04
IPC分类号： H04B1/26
CPC分类号： H04L25/061 , H03D3/008 , H03G3/3068 , H04B1/30
摘要： A method and apparatus are provided for providing improved radio frequency (RF) receiver signal correction. For RF receiver circuitry (106) having receive path and a warmup period associated therewith and including at least one analog baseband gain control stage (218) having a gain associated therewith, the method includes the step of performing a DC correction calculation operation during the warmup period to derive a DC correction value having a first component and a second component for each of the at least one gain control stage (218). The DC correction calculation step includes the steps of performing a first closed loop correction (460) of a baseband path to derive the first component of the DC correction value and performing a second closed loop correction (462) of the receive path as a function of the (218) gain during the warmup period to derive the second component of the DC correction value. During operation after the warmup period (464 , 466), an open loop correction is performed for instantaneous DC correction as function of the PMA (218) gain and the DC correction value.
摘要翻译： 提供了一种用于提供改进的射频（RF）接收机信号校正的方法和装置。 对于具有接收路径和与其相关联的预热时段的RF接收器电路（106），并且包括具有与其相关联的增益的至少一个模拟基带增益控制级（218），该方法包括在预热期间执行DC校正计算操作的步骤 以产生具有用于所述至少一个增益控制级（218）中的每一个的第一分量和第二分量的DC校正值。 DC校正计算步骤包括以下步骤：执行基带路径的第一闭环校正（460）以导出DC校正值的第一分量，并且执行作为接收路径的函数的接收路径的第二闭环校正（462） （218）在预热期间获得增益，以导出DC校正值的第二分量。 在预热时段（464,466）之后的操作期间，作为PMA（218）增益和DC校正值的函数，执行用于瞬时DC校正的开环校正。
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公开(公告)号：US07693242B2
公开(公告)日：2010-04-06
申请号：US11151752
申请日：2005-06-14
申请人： Charles L. Sobchak , Mahibur Rahman
发明人： Charles L. Sobchak , Mahibur Rahman
IPC分类号： H04B1/10
CPC分类号： H04B1/30
摘要： Methods (1500) and corresponding systems (400, 500) for determining and correcting a DC offset in a receiver operate to sample (1503) a signal to provide complex samples; estimate (1505) a Direct Current (DC) offset corresponding to each of the complex samples, the estimating the DC offset further including solving a plurality of equations relating to the plurality of complex samples, e.g., N simultaneous equations in N samples with a power of the signal invariant across the N samples, to deterministically derive offset values; and then remove (1517) the DC offset from the signal.
摘要翻译： 用于确定和校正接收机中的DC偏移的方法（1500）和对应系统（400,500）操作以对信号进行采样（1503）以提供复杂采样; 估计（1505）对应于每个复样本的直流（DC）偏移，进一步估计DC偏移，包括求解与多个复样本有关的多个等式，例如，具有功率的N个采样中的N个联立方程 在N个样本之间的信号不变量，以确定性地导出偏移值; 然后从信号中删除（1517）DC偏移。
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公开(公告)号：US07486941B2
公开(公告)日：2009-02-03
申请号：US11099278
申请日：2005-04-04
IPC分类号： H04B1/26
CPC分类号： H03G1/0088 , H03G3/3068
摘要： Dynamic gain and phase compensation is provided in a radio frequency (RF) receiver (106) including at least one switched Low Noise Amplifier (LNA) (212) coupled to an RF gain control unit (226) providing a gain control signal to the at least one switched LNA (212) for control thereof. The RF receiver also includes an analog-to-digital (A/D) converter (222) for digitizing the RF signal and outputting an N-bit digital signal to the RF gain control unit (226). The method for gain compensation includes dynamically adjusting the N-bit digital signal to compensate for the at least one switched LNA (212) in response to the gain control signal. The method for phase compensation includes dynamically normalizing the N-bit digital signal into an M-bit signal range to derive an M-bit digital signal, where M≦N and dynamically phase adjusting the M-bit digital signal to compensate for the at least one switched LNA (212) in response to the gain control signal.
摘要翻译： 在包括耦合到RF增益控制单元（226）的至少一个切换低噪声放大器（LNA）（212））的射频（RF）接收机（106）中提供动态增益和相位补偿，该RF增益控制单元（226）提供增益控制信号 至少一个用于控制的切换LNA（212）。 RF接收机还包括用于数字化RF信号并将N位数字信号输出到RF增益控制单元（226）的模拟（A / D）转换器（222）。 用于增益补偿的方法包括动态调整N位数字信号，以响应于增益控制信号来补偿至少一个开关LNA（212）。 用于相位补偿的方法包括将N位数字信号动态归一化为M位信号范围以导出M位数字信号，其中M <= N并动态相位调整M位数字信号以补偿at 至少一个切换LNA（212）响应于增益控制信号。
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4.发明授权公开(公告)号：US07324616B2
公开(公告)日：2008-01-29
申请号：US10790168
申请日：2004-03-01
IPC分类号： H03D1/04
CPC分类号： H04B1/1036
摘要： A narrowband interference cancellation system, method and digital signal processor is disclosed that removes narrowband interference in wide band communication systems. The system includes a narrowband processing component, wideband processing component, soft metric generator and at least one filter. The system is configured to receive a signal, identify one or more narrowband interferers in the received signal and filter out identified narrowband interferers. The narrowband processing component includes a filter bank configured to separate the received signal into a predetermined number of channel bands and identify a band with interference. The wide band processing component provides an average level for an unfiltered version of the received signal. The soft decision metric generator produces metrics based on predetermined thresholds. The filters receive coefficients that are determined using outputs from the soft decision metric generator that are first averaged using long term integrators and then stored in lookup tables.
摘要翻译： 公开了一种在宽带通信系统中消除窄带干扰的窄带干扰消除系统，方法和数字信号处理器。 该系统包括窄带处理组件，宽带处理组件，软度量发生器和至少一个过滤器。 该系统被配置为接收信号，识别接收到的信号中的一个或多个窄带干扰信号并且滤除所识别的窄带干扰信号。 窄带处理部件包括滤波器组，被配置为将接收的信号分离成预定数量的信道频带并且识别具有干扰的频带。 宽带处理组件为接收信号的未滤波版本提供平均电平。 软判决度量发生器基于预定阈值产生指标。 滤波器接收使用来自软判决度量发生器的输出确定的系数，其首先使用长期积分器进行平均，然后存储在查找表中。
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公开(公告)号：US07929650B2
公开(公告)日：2011-04-19
申请号：US11252525
申请日：2005-10-18
申请人： Charles L. Sobchak , Mahibur Rahman
发明人： Charles L. Sobchak , Mahibur Rahman
IPC分类号： H04L27/08
CPC分类号： H04L27/3809 , H03M3/486 , H03M3/49
摘要： An automatic gain control (AGC) system for a receiver and corresponding method facilitate AGC in a receiver. The automatic gain control system includes an on-channel signal detector 123 configured to provide an on-channel signal level indication corresponding to a narrow band on-channel signal and a wideband signal detector 121 configured to provide a wideband signal level indication corresponding to a wideband signal, where the wideband signal includes the narrow band on-channel signal. Further included is a controller 149 that is coupled to the wideband signal level indication and the on-channel signal level indication and that is configured to provide a gain control signal corresponding to the wideband signal level and one or more of a plurality of states of the receiver.
摘要翻译： 用于接收机的自动增益控制（AGC）系统和相应的方法便于接收机中的AGC。 自动增益控制系统包括通道信号检测器123，其被配置为提供对应于窄带通道信号的通道信号电平指示和宽带信号检测器121，宽带信号检测器121被配置为提供对应于宽带的宽带信号电平指示 信号，其中宽带信号包括窄带通道信号。 还包括控制器149，其被耦合到宽带信号电平指示和通道信号电平指示，并被配置为提供对应于宽带信号电平的增益控制信号和多个状态中的一个或多个 接收器。
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公开(公告)号：US07603094B2
公开(公告)日：2009-10-13
申请号：US11452457
申请日：2006-06-14
申请人： Mahibur Rahman , Charles L. Sobchak
发明人： Mahibur Rahman , Charles L. Sobchak
摘要： A direct current (DC) offset correction system for a direct conversion receiver and corresponding receiver and methods facilitate reduction of DC offsets in such receivers. One method includes calibrating a DC offset correction system in a closed loop configuration over each of a plurality of gain settings to provide a plurality of offset data for an operating mode of the direct conversion receiver; selecting one of the plurality of offset data based on a current gain setting of the direct conversion receiver as supplied, e.g., by an AGC system; and operating the DC offset correction system in an open loop configuration using the one of the plurality of offset data to correct for a DC offset in the direct conversion receiver.
摘要翻译： 用于直接转换接收机的直流（DC）偏移校正系统和相应的接收机和方法有助于减少这种接收机中的直流偏移。 一种方法包括在多个增益设置中的每一个上校准闭环配置中的DC偏移校正系统，以提供用于直接转换接收机的操作模式的多个偏移数据; 基于例如由AGC系统提供的直接转换接收机的当前增益设置来选择多个偏移数据中的一个; 以及使用所述多个偏移数据中的所述多个偏移数据中的所述直流偏移校正系统在开环配置中操作，以校正所述直接转换接收器中的直流偏移。
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公开(公告)号：US20070293180A1
公开(公告)日：2007-12-20
申请号：US11452457
申请日：2006-06-14
申请人： Mahibur Rahman , Charles L. Sobchak
发明人： Mahibur Rahman , Charles L. Sobchak
摘要： A direct current (DC) offset correction system for a direct conversion receiver and corresponding receiver and methods facilitate reduction of DC offsets in such receivers. One method includes calibrating a DC offset correction system in a closed loop configuration over each of a plurality of gain settings to provide a plurality of offset data for an operating mode of the direct conversion receiver; selecting one of the plurality of offset data based on a current gain setting of the direct conversion receiver as supplied, e.g., by an AGC system; and operating the DC offset correction system in an open loop configuration using the one of the plurality of offset data to correct for a DC offset in the direct conversion receiver.
摘要翻译： 用于直接转换接收机的直流（DC）偏移校正系统和相应的接收机和方法有助于减少这种接收机中的直流偏移。 一种方法包括在多个增益设置中的每一个上校准闭环配置中的DC偏移校正系统，以提供用于直接转换接收机的操作模式的多个偏移数据; 基于例如由AGC系统提供的直接转换接收机的当前增益设置来选择多个偏移数据中的一个; 以及使用所述多个偏移数据中的所述多个偏移数据中的所述直流偏移校正系统在开环配置中操作，以校正所述直接转换接收器中的直流偏移。
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公开(公告)号：US09031526B2
公开(公告)日：2015-05-12
申请号：US13527006
申请日：2012-06-19
CPC分类号： H04B1/10 , H04B1/1027 , H04B1/12 , H04J11/0066
摘要： A communication device includes a receiver that is capable of canceling in-channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in-channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.
摘要翻译： 通信设备包括能够消除信道内干扰的接收机。 接收机包括用于接收包括信道内分量和信道外分量的无线信号的天线，其中信道内分量包括期望分量和信道内干扰分量。 接收机的第一滤波器通过阻挡信道外分量的至少一部分来产生包括信道内分量的第一信号来对无线信号进行滤波，并且接收器的至少第二滤波器通过 阻塞信道内分量的至少一部分以产生包括信道外分量的第二信号。 接收机的信道内干扰估计器基于第二信号产生信道内干扰估计信号。 并且滤波器的组合器组合第一信号和第二信号以至少部分地消除第一信号的信道内干扰分量。
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公开(公告)号：US20130337761A1
公开(公告)日：2013-12-19
申请号：US13527006
申请日：2012-06-19
IPC分类号： H04B1/10
CPC分类号： H04B1/10 , H04B1/1027 , H04B1/12 , H04J11/0066
摘要： A communication device includes a receiver that is capable of canceling in-channel interference. The receiver includes an antenna for receiving a wireless signal comprising in-channel components and an out-of-channel component, wherein the in-channel components comprise a desired component and an in-channel interference component. A first filter of the receiver filters the wireless signal by blocking at least a portion of the out-of-channel component to produce a first signal comprising the in-channel components, and at least a second filter of the receiver filters the wireless signal by blocking at least a portion of the in-channel components to produce a second signal comprising the out-of-channel component. An in-channel interference estimator of the receiver generates an in-channel interference estimation signal based on the second signal. And a combiner of the filter combines the first signal and the second signal to at least partially cancel the in-channel interference component of the first signal.
摘要翻译： 通信设备包括能够消除信道内干扰的接收机。 接收机包括用于接收包括信道内分量和信道外分量的无线信号的天线，其中，信道内分量包括期望分量和信道内干扰分量。 接收机的第一滤波器通过阻挡信道外分量的至少一部分来产生包括信道内分量的第一信号来对无线信号进行滤波，并且接收器的至少第二滤波器通过 阻塞信道内分量的至少一部分以产生包括信道外分量的第二信号。 接收机的信道内干扰估计器基于第二信号产生信道内干扰估计信号。 并且滤波器的组合器组合第一信号和第二信号以至少部分地消除第一信号的信道内干扰分量。
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