公开(公告)号：US07148749B2

公开(公告)日：2006-12-12

申请号：US11046910

申请日：2005-01-31

申请人： Mahibur Rahman ,  Jorge Ivonnet ,  Pravinkumar Premakanthan

发明人： Mahibur Rahman ,  Jorge Ivonnet ,  Pravinkumar Premakanthan

IPC分类号： H03G3/10

CPC分类号： H03G3/3047

摘要： A method (500) and apparatus (300, 400, 601) facilitate closed loop transmit power control in a power control loop at and during a transition from one transmit power level to another transmit power level in a transmitter. The apparatus includes a reference path (326) configured to provide a reference signal (325) and a gain compensation signal (417), a detect path (327) configured to process, in accordance with the gain compensation signal, a detected signal corresponding to a power level to provide a gain compensated detected signal; and a power control path (328) configured to generate a power control value in accordance with the reference signal, the gain compensated detected signal, and a loop compensation factor associated with the gain compensation signal where the power control value is suitable for setting the power level for the transmission.

公开(公告)号：US20060222116A1

公开(公告)日：2006-10-05

申请号：US11095274

申请日：2005-03-31

申请人： James Hughes ,  Lynn Freytag ,  Mahibur Rahman

发明人： James Hughes ,  Lynn Freytag ,  Mahibur Rahman

IPC分类号： H04L27/08

CPC分类号： H04L27/3809 ,  H03G1/0088 ,  H03G3/3068 ,  H03G3/3078 ,  H04B1/109

摘要： An automatic gain control (AGC) system for a receiver and corresponding method facilitate AGC in a receiver. The AGC system includes an on-channel detector 123 configured to provide an on-channel automatic gain control (AGC) indication; an off-channel signal detector 145 configured to provide an off-channel AGC indication; and a controller 143, 173 coupled to the on-channel AGC indication and the off-channel AGC indication and configured to provide a gain control signal corresponding to at least one of the on-channel AGC indication and the off-channel AGC indication.

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。 AGC系统包括被配置为提供通道内自动增益控制（AGC）指示的通道检测器123; 被配置为提供离频通道AGC指示的偏离信道检测器145; 以及控制器143,173，其耦合到通道上的AGC指示和非通道AGC指示，并且被配置为提供与通道内AGC指示和非通道AGC指示中的至少一个对应的增益控制信号。

公开(公告)号：US20060220935A1

公开(公告)日：2006-10-05

申请号：US11095910

申请日：2005-03-31

申请人： James Hughes ,  Mahibur Rahman ,  Louis Vannatta

发明人： James Hughes ,  Mahibur Rahman ,  Louis Vannatta

IPC分类号： H03M3/00

CPC分类号： H03M1/181 ,  H03M3/49

摘要： Techniques for adjusting the dynamic range of an A/D converter in response to various conditions are disclosed. A value output by the A/D converter is utilized to determine if the A/D converter is operating at or above its current dynamic range capabilities (i.e., the AID converter is potentially “saturated” at its current dynamic range setting). If potentially saturated, the dynamic range of the A/D converter may be increased. If not, the dynamic range of the A/D converter may be decreased or may be unchanged. Alternately, an upcoming or enacted change in the gain settings of one or more gain stages that condition the analog signal input to an A/D converter may be used as a condition that results in an adjustment to the dynamic range of the A/D converter.

摘要翻译： 公开了响应于各种条件来调整A / D转换器的动态范围的技术。 由A / D转换器输出的值用于确定A / D转换器是否在其当前动态范围能力以上（即，AID转换器在其当前动态范围设置下潜在地“饱和”）。 如果潜在饱和，则A / D转换器的动态范围可能会增加。 如果不是，则A / D转换器的动态范围可以减小或者可以不变。 或者，可以使用将模拟信号输入到A / D转换器进行调节的一个或多个增益级的增益设置中的即将到来的或已经颁布的改变作为导致对A / D转换器的动态范围进行调整的条件 。

公开(公告)号：US20050122166A1

公开(公告)日：2005-06-09

申请号：US10731069

申请日：2003-12-09

申请人： Pravinkumar Premakanthan ,  Mahibur Rahman

发明人： Pravinkumar Premakanthan ,  Mahibur Rahman

IPC分类号： H03G3/30 ,  H03G3/00

CPC分类号： H03G3/3047

摘要： An adaptive closed loop transmit power control system which does not require extensive factory calibration of power control loop bandwidths and feedback detect path gain settings over the power transition ranges, frequency bands of operation, temperature, and supply voltage is disclosed. The system automatically compensates for any gain or slope variations in the analog feedforward and feedback paths to maintain system stability and meet performance specifications. The system achieves this by using an adaptive digital signal processing (DSP) system architecture within the feedback path of this closed loop power control system. The system eliminates the need for extensive factory calibration of such parameters as loop bandwidths and feedback detect path gain settings over power transition ranges, frequency bands of operation, temperature, and supply voltage.

摘要翻译： 公开了一种自适应闭环发射功率控制系统，其不需要对功率控制环路带宽进行广泛的工厂校准，并且在功率转换范围，工作频带，温度和电源电压之间检测路径增益设置。 系统自动补偿模拟前馈和反馈路径中的任何增益或斜率变化，以保持系统稳定性并满足性能规格。 该系统通过在该闭环功率控制系统的反馈路径内使用自适应数字信号处理（DSP）系统架构来实现。 该系统消除了对功率转换范围，工作频带，温度和电源电压等循环带宽和反馈检测路径增益设置等参数的广泛出厂校准的需要。

公开(公告)号：US09100921B2

公开(公告)日：2015-08-04

申请号：US13590008

申请日：2012-08-20

申请人： Bing Xu ,  Mahibur Rahman ,  Chunmig Zhao

发明人： Bing Xu ,  Mahibur Rahman ,  Chunmig Zhao

IPC分类号： H04B1/04 ,  H04W52/08 ,  H04W52/10 ,  H04W52/52 ,  H04W52/26 ,  H04L27/00

CPC分类号： H04W52/08 ,  H04L27/0012 ,  H04W52/10 ,  H04W52/262 ,  H04W52/52

摘要： Embodiments include methods and apparatus for performing transmit power control. A gain application element receives a sequence of digital input samples and a digital gain signal, and combines the digital gain signal with the digital input samples to generate a sequence of gain-compensated digital samples. A power amplifier receives and amplifies an analog version of the gain-compensated digital samples in order to generate an antenna output signal. A feedback path generates an analog feedback signal from the antenna output signal, produces a sequence of digital feedback samples from the analog feedback signal, and generates difference values based on the digital feedback samples. When a specified type of constant modulus symbol is represented in the antenna output symbol, the feedback path accumulates the difference values into an accumulated error value, and produces the digital gain signal from the accumulated error value.

摘要翻译： 实施例包括用于执行发射功率控制的方法和装置。 增益应用元件接收数字输入采样序列和数字增益信号，并将数字增益信号与数字输入采样相结合，以生成增益补偿数字采样序列。 功率放大器接收并放大增益补偿数字采样的模拟版本，以产生天线输出信号。 反馈路径从天线输出信号产生模拟反馈信号，从模拟反馈信号产生一系列数字反馈采样，并根据数字反馈采样产生差值。 当在天线输出符号中表示指定类型的常数符号符号时，反馈路径将差值累积为累积误差值，并从积累的误差值产生数字增益信号。

公开(公告)号：US20130045773A1

公开(公告)日：2013-02-21

申请号：US13590008

申请日：2012-08-20

申请人： Bing Xu ,  Mahibur Rahman ,  Chunmig Zhao

发明人： Bing Xu ,  Mahibur Rahman ,  Chunmig Zhao

IPC分类号： H04W52/10 ,  H04W88/02 ,  H04W52/08

CPC分类号： H04W52/08 ,  H04L27/0012 ,  H04W52/10 ,  H04W52/262 ,  H04W52/52

摘要： Embodiments include methods and apparatus for performing transmit power control. A gain application element receives a sequence of digital input samples and a digital gain signal, and combines the digital gain signal with the digital input samples to generate a sequence of gain-compensated digital samples. A power amplifier receives and amplifies an analog version of the gain-compensated digital samples in order to generate an antenna output signal. A feedback path generates an analog feedback signal from the antenna output signal, produces a sequence of digital feedback samples from the analog feedback signal, and generates difference values based on the digital feedback samples. When a specified type of constant modulus symbol is represented in the antenna output symbol, the feedback path accumulates the difference values into an accumulated error value, and produces the digital gain signal from the accumulated error value.

摘要翻译： 实施例包括用于执行发射功率控制的方法和装置。 增益应用元件接收数字输入采样序列和数字增益信号，并将数字增益信号与数字输入采样相结合，以生成增益补偿数字采样序列。 功率放大器接收并放大增益补偿数字采样的模拟版本，以产生天线输出信号。 反馈路径从天线输出信号产生模拟反馈信号，从模拟反馈信号产生一系列数字反馈采样，并根据数字反馈采样产生差值。 当在天线输出符号中表示指定类型的常数符号符号时，反馈路径将差值累积为累积误差值，并从积累的误差值产生数字增益信号。

公开(公告)号：US20130016619A1

公开(公告)日：2013-01-17

申请号：US13184180

申请日：2011-07-15

申请人： Mahibur Rahman ,  Omid Oliaei ,  Jorge Ivonnet

发明人： Mahibur Rahman ,  Omid Oliaei ,  Jorge Ivonnet

IPC分类号： H04W24/00

CPC分类号： H04B1/10 ,  H04B1/0046

摘要： A method may include: determining a signal strength of a signal in a receive path of a wireless communication element, the receive path configured to receive a wireless communication signal and convert the wireless communication signal into a digital signal based at least on an oscillator signal; selecting a current mode from at least one of a first current mode and a second current mode for the wireless communication element based at least on the signal strength; communicating a control signal to the receive path indicative of the current mode; modifying one or more operational parameters of the receive path such that the receive path consumes a different amount of current in each of the current modes.

摘要翻译： 方法可以包括：确定无线通信元件的接收路径中的信号的信号强度，所述接收路径被配置为接收无线通信信号，并且至少基于振荡器信号将无线通信信号转换为数字信号; 至少基于信号强度从无线通信元件的第一当前模式和第二当前模式中的至少一个中选择当前模式; 将控制信号传送到指示当前模式的接收路径; 修改接收路径的一个或多个操作参数，使得接收路径在每个当前模式中消耗不同的电流量。

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。

公开(公告)号：US07912437B2

公开(公告)日：2011-03-22

申请号：US11621355

申请日：2007-01-09

申请人： Mahibur Rahman ,  Charles LeRoy Sobchak

发明人： Mahibur Rahman ,  Charles LeRoy Sobchak

IPC分类号： H04B1/10

CPC分类号： H04B1/30 ,  H04L27/0002 ,  H04L27/22

摘要： A radio frequency receiver (102) includes at least one amplifier (108, 114 and 122) for amplifying a signal received by the radio frequency receiver, an automatic gain control system (158) for controlling a gain of the at least one amplifier, and a direct current offset correction filter (142) for reducing any direct current component of the signal amplified by the at least one amplifier. The direct current offset correction filter has a bandwidth that is dynamically controlled by a change in the gain of the at least one amplifier. The radio frequency receiver also includes a digital automatic gain control unit (150) having a bandwidth that is dynamically controlled by the change in the gain of the at least one amplifier.

摘要翻译： 射频接收器（102）包括用于放大由射频接收机接收的信号的至少一个放大器（108,114和122），用于控制至少一个放大器的增益的自动增益控制系统（158），以及 用于减少由至少一个放大器放大的信号的任何直流分量的直流偏移校正滤波器（142）。 直流偏移校正滤波器具有由至少一个放大器的增益的变化动态地控制的带宽。 无线电频率接收机还包括一个数字自动增益控制单元（150），该数字自动增益控制单元具有由至少一个放大器的增益变化动态控制的带宽。

公开(公告)号：US20100113105A1

公开(公告)日：2010-05-06

申请号：US12262943

申请日：2008-10-31

申请人： Bing Xu ,  Mahibur Rahman ,  Chunming Zhao

发明人： Bing Xu ,  Mahibur Rahman ,  Chunming Zhao

IPC分类号： H04B1/38 ,  H01Q11/12 ,  H04B1/16

CPC分类号： H04W52/08 ,  H04L27/0012 ,  H04W52/10 ,  H04W52/262 ,  H04W52/52

摘要： Embodiments include methods and apparatus for performing transmit power control. A gain application element receives a sequence of digital input samples and a digital gain signal, and combines the digital gain signal with the digital input samples to generate a sequence of gain-compensated digital samples. A power amplifier receives and amplifies an analog version of the gain-compensated digital samples in order to generate an antenna output signal. A feedback path generates an analog feedback signal from the antenna output signal, produces a sequence of digital feedback samples from the analog feedback signal, and generates difference values based on the digital feedback samples. When a specified type of constant modulus symbol is represented in the antenna output symbol, the feedback path accumulates the difference values into an accumulated error value, and produces the digital gain signal from the accumulated error value.

摘要翻译： 实施例包括用于执行发射功率控制的方法和装置。 增益应用元件接收数字输入采样序列和数字增益信号，并将数字增益信号与数字输入采样相结合，以生成增益补偿数字采样序列。 功率放大器接收并放大增益补偿数字采样的模拟版本，以产生天线输出信号。 反馈路径从天线输出信号产生模拟反馈信号，从模拟反馈信号产生一系列数字反馈采样，并根据数字反馈采样产生差值。 当在天线输出符号中表示指定类型的常数符号符号时，反馈路径将差值累积为累积误差值，并从积累的误差值产生数字增益信号。