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61. 发明授权

US08478213B2 Methods and apparatus for power control 有权
标题翻译：功率控制方法与装置
公开(公告)号：US08478213B2
公开(公告)日：2013-07-02
申请号：US13273768
申请日：2011-10-14
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H04B1/04
CPC分类号： H04W52/52 , H03F1/34 , H03F3/24 , H04B1/04 , H04B2001/0416 , H04B2001/0433
摘要： Various embodiments include a method for controlling power in a transmitter, the method comprising measuring an indication of an output power of the transmitter, comparing a first value corresponding to the indication of the output power to a second value corresponding to a desired output power; and adjusting a bias of at least one component in the transmitter in order to bring the output power closer to the desired output power. Embodiments also include various methods, systems and apparatus.
摘要翻译：各种实施例包括一种用于控制发射机功率的方法，所述方法包括测量发射机的输出功率的指示，将对应于输出功率的指示的第一值与对应于期望输出功率的第二值进行比较; 以及调整发射机中的至少一个分量的偏压，以使输出功率更接近所需的输出功率。实施例还包括各种方法，系统和装置。

62. 发明授权

US08428526B2 System and method for tuning baseband filters in wireless transceivers 有权
标题翻译：用于调谐无线收发器中基带滤波器的系统和方法
公开(公告)号：US08428526B2
公开(公告)日：2013-04-23
申请号：US12049995
申请日：2008-03-17
申请人： Yongtao Wang , Khurram Muhammad
发明人： Yongtao Wang , Khurram Muhammad
IPC分类号： H04B1/04 , H04K3/00
CPC分类号： H04B1/1027 , H03J3/08 , H03J2200/32
摘要： A system and method for tuning baseband filters in wireless transceivers. A method comprises coupling a radio frequency (RF) signal generated by the wireless transmitter at an input of a wireless receiver, the RF signal having a desired frequency, measuring a magnitude of the coupled RF signal at an output of an analog-to-digital converter at an output of an analog baseband filter, wherein the magnitude is measured at the desired frequency, and adjusting a corner frequency of the analog baseband filter in response to the determining that the measured magnitude differs from a specified value.
摘要翻译：一种用于调谐无线收发器中基带滤波器的系统和方法。一种方法包括在无线接收机的输入处耦合由无线发射机产生的射频（RF）信号，所述RF信号具有期望的频率，在模数转换器的输出处测量耦合RF信号的幅度转换器，其中所述幅度以期望的频率被测量，并且响应于确定所测量的幅度与指定值的不同而调整所述模拟基带滤波器的转角频率。

63. 发明授权

US08170507B2 Predistortion methods and apparatus for transmitter linearization in a communication transceiver 有权
标题翻译：用于通信收发器中发射机线性化的预失真方法和装置
公开(公告)号：US08170507B2
公开(公告)日：2012-05-01
申请号：US12260832
申请日：2008-10-29
申请人： Yongtao Wang , Khurram Waheed , Sameh S. Rezeq , Jaimin Mehta , Prasad Srinivasan , Khurram Muhammad
发明人： Yongtao Wang , Khurram Waheed , Sameh S. Rezeq , Jaimin Mehta , Prasad Srinivasan , Khurram Muhammad
IPC分类号： H04B1/04
CPC分类号： H03F3/24 , H03F1/3241 , H03F3/72 , H04B2001/0425
摘要： Predistortion methods and apparatus for transmitter linearization in a communication transceiver are disclosed. An example apparatus to linearize a digitally controlled pre-power amplifier included in a transmitter of a communication transceiver disclosed herein comprises a predistorter to predistort an input signal to be processed by the digitally controlled pre-power amplifier, a coupling path within the communication transceiver to couple an output of the digitally controlled pre-power amplifier to an input of a receiver included in the communication transceiver without enabling an output power amplifier stage of a multi-stage power amplifier coupled to an output of the digitally controlled pre-power amplifier, wherein no additional hardware components are required to implement the coupling path within the communication transceiver, and a predistortion evaluator comprising a predistortion calibrator and a predistortion compensator to process data demodulated by the receiver to generate and update predistortion values for use by the predistorter.
摘要翻译：公开了用于通信收发器中的发射机线性化的预失真方法和装置。线性化包括在本文公开的通信收发器的发射机中的数字控制的预功率放大器的示例性装置包括预失真器，用于预失真由数字控制的预功率放大器处理的输入信号，通信收发器内的耦合路径将数字控制的预功率放大器的输出耦合到通信收发器中包括的接收器的输入，而不使能耦合到数字控制的预功率放大器的输出的多级功率放大器的输出功率放大器级，其中不需要额外的硬件组件来实现通信收发信机内的耦合路径，以及预失真评估器，包括预失真校准器和预失真补偿器，用于处理由接收机解调的数据，以生成和更新预失真值供预失真器使用。

64. 发明申请

US20100330942A1 LINEARITY OF AN RF RECEIVE PATH BY SPURIOUS TONE SUPPRESSION 有权
标题翻译：射频接收路径通过SPULTIUS TONE抑制的线性
公开(公告)号：US20100330942A1
公开(公告)日：2010-12-30
申请号：US12492413
申请日：2009-06-26
申请人： Hunsoo Choo , Imtinan Elahi , Khurram Muhammad
发明人： Hunsoo Choo , Imtinan Elahi , Khurram Muhammad
IPC分类号： H04B17/00
CPC分类号： H04B17/309 , H04B17/21
摘要： A method of increasing linearity of an RF signal receive path includes measuring a signal amplified by the receive path. The receive path has a local oscillator operating at an LO frequency and a ground. An error signal is determined from the amplified signal, the error signal being representative of the nonlinearity. An anti-spur tone is injected into the ground. The anti-spur tone has a frequency about equal to the LO frequency and an amplitude and phase that are determined to increase the linearity of the receive path.
摘要翻译：提高RF信号接收路径的线性度的方法包括测量由接收路径放大的信号。接收路径具有以LO频率和接地运行的本地振荡器。误差信号由放大信号确定，误差信号代表非线性。抗刺激色调注入地面。反音色具有大约等于LO频率的频率以及被确定为增加接收路径的线性度的幅度和相位。

65. 发明授权

US07808327B2 Method and apparatus to provide digitally controlled crystal oscillators 有权
标题翻译：提供数字控制晶体振荡器的方法和装置
公开(公告)号：US07808327B2
公开(公告)日：2010-10-05
申请号：US11500083
申请日：2006-08-07
申请人： Gennady Feygin , Khurram Muhammad , Chih-Ming Hung , Meng-Chang Lee
发明人： Gennady Feygin , Khurram Muhammad , Chih-Ming Hung , Meng-Chang Lee
IPC分类号： H03B27/00
CPC分类号： H03L7/24 , H03L1/026 , H03L3/00 , H03L7/0995
摘要： Methods and systems to provide digitally controlled crystal oscillators are disclosed. One example method includes determining a state of an oscillator system and selecting a first output of a digitally controlled crystal oscillator or a second output of a second oscillator based on the determination. In an example implementation, the second oscillator is a ring oscillator.
摘要翻译：公开了提供数字控制晶体振荡器的方法和系统。一个示例性方法包括基于该确定来确定振荡器系统的状态并选择数字控制的晶体振荡器的第一输出或第二振荡器的第二输出。在示例实现中，第二振荡器是环形振荡器。

66. 发明授权

US07808325B2 System and method for frequency pushing/pulling compensation 有权
标题翻译：频率推/拉补偿的系统和方法
公开(公告)号：US07808325B2
公开(公告)日：2010-10-05
申请号：US12326569
申请日：2008-12-02
申请人： Khurram Waheed , Khurram Muhammad , Jingcheng Zhuang
发明人： Khurram Waheed , Khurram Muhammad , Jingcheng Zhuang
IPC分类号： H03L7/085
CPC分类号： H03L7/099 , H03L2207/50
摘要： A system and method for frequency pushing/pulling compensation in phase-locked loops including a method for cancelling frequency push/pull in an oscillator of a transmitter. The method includes computing an error signal from a signal of a phase locked loop, wherein the error signal includes an aggressor signal. Transfer characteristics are computed for the aggressor signal. A transmitted signal is filtered using the transfer characteristics to produce a correction term. The correction term is applied to a frequency control word being provided to the oscillator.
摘要翻译：一种用于在锁相环中频率推/拉补偿的系统和方法，包括用于消除发射机振荡器中的频率推/拉的方法。该方法包括从锁相环的信号计算误差信号，其中误差信号包括侵略者信号。对侵略者信号计算传输特性。使用传输特性对传输的信号进行滤波以产生校正项。校正项被应用于提供给振荡器的频率控制字。

67. 发明申请

US20100165895A1 METHODS AND APPARATUS FOR CANCELING DISTORTION IN FULL-DUPLEX TRANSCEIVERS 有权
标题翻译：全双工收发器取消失效的方法和装置
公开(公告)号：US20100165895A1
公开(公告)日：2010-07-01
申请号：US12346591
申请日：2008-12-30
申请人： Imtinan Elahi , Khurram Muhammad
发明人： Imtinan Elahi , Khurram Muhammad
IPC分类号： H04B3/20
CPC分类号： H04L5/1461 , H04L5/1423 , H04L25/03031
摘要： Methods and apparatus for canceling distortion in full-duplex transceivers are disclosed. Some example methods to reduce distortion in a full-duplex transceiver include generating a first digital signal, generating a first analog signal based on the first digital signal for transmission over a full-duplex channel, receiving a second analog signal via the full-duplex channel, and generating a second digital signal based on the second analog signal, wherein the second digital signal includes coupling distortion based on the first analog signal. The example methods further include generating an adaptive filter signal based on the first digital signal, and reducing the coupling distortion from the second digital signal by subtracting the adaptive filter signal from the second digital signal.
摘要翻译：公开了用于消除全双工收发器失真的方法和装置。减少全双工收发器失真的一些示例性方法包括产生第一数字信号，基于第一数字信号产生第一模拟信号以便在全双工信道上传输，经由全双工信道接收第二模拟信号并且基于所述第二模拟信号产生第二数字信号，其中所述第二数字信号包括基于所述第一模拟信号的耦合失真。示例性方法还包括基于第一数字信号产生自适应滤波器信号，并且通过从第二数字信号中减去自适应滤波器信号来减少来自第二数字信号的耦合失真。

68. 发明申请

US20100105338A1 PREDISTORTION METHODS AND APPARATUS FOR TRANSMITTER LINEARIZATION IN A COMMUNICATION TRANSCEIVER 有权
标题翻译：通信收发器中发射机线性化的预测方法和装置
公开(公告)号：US20100105338A1
公开(公告)日：2010-04-29
申请号：US12260832
申请日：2008-10-29
申请人： Yongtao Wang , Khurram Waheed , Sameh S. Rezeq , Jaimin Mehta , Prasad Srinivasan , Khurram Muhammad
发明人： Yongtao Wang , Khurram Waheed , Sameh S. Rezeq , Jaimin Mehta , Prasad Srinivasan , Khurram Muhammad
IPC分类号： H04B1/62 , H03F1/32 , H04B1/40
CPC分类号： H03F3/24 , H03F1/3241 , H03F3/72 , H04B2001/0425
摘要： Predistortion methods and apparatus for transmitter linearization in a communication transceiver are disclosed. An example apparatus to linearize a digitally controlled pre-power amplifier included in a transmitter of a communication transceiver disclosed herein comprises a predistorter to predistort an input signal to be processed by the digitally controlled pre-power amplifier, a coupling path within the communication transceiver to couple an output of the digitally controlled pre-power amplifier to an input of a receiver included in the communication transceiver without enabling an output power amplifier stage of a multi-stage power amplifier coupled to an output of the digitally controlled pre-power amplifier, wherein no additional hardware components are required to implement the coupling path within the communication transceiver, and a predistortion evaluator comprising a predistortion calibrator and a predistortion compensator to process data demodulated by the receiver to generate and update predistortion values for use by the predistorter.
摘要翻译：公开了用于通信收发器中的发射机线性化的预失真方法和装置。线性化包括在本文公开的通信收发器的发射机中的数字控制的预功率放大器的示例性装置包括预失真器，用于预失真由数字控制的预功率放大器处理的输入信号，通信收发器内的耦合路径将数字控制的预功率放大器的输出耦合到通信收发器中包括的接收器的输入，而不使能耦合到数字控制的预功率放大器的输出的多级功率放大器的输出功率放大器级，其中不需要额外的硬件组件来实现通信收发信机内的耦合路径，以及预失真评估器，包括预失真校准器和预失真补偿器，用于处理由接收机解调的数据，以生成和更新预失真值供预失真器使用。

69. 发明申请

US20090168856A1 System and Method for Adaptive Equalization of In-Package Signals 审中-公开
标题翻译：包装信号自适应均衡的系统和方法
公开(公告)号：US20090168856A1
公开(公告)日：2009-07-02
申请号：US12029743
申请日：2008-02-12
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04L25/03133 , H04B1/525 , H04L27/368 , H04L2025/0377
摘要： A system and method for adaptive equalization of in-package signals. A method for operating a wireless communications device having a transmitter and a receiver includes receiving a transmitted signal at the receiver, wherein the receiving of the transmitted signal occurs by mutual inductance, converting the received transmitted signal into a baseband signal, equalizing the baseband signal, computing a correction signal from the equalized baseband signal, and providing the correction signal to the transmitter. The equalizing of the baseband signal helps to eliminate or reduce multipath arising from mutual inductance between the transmitter and the receiver. The elimination of the multipath helps to improve the quality of the correction signal, thereby helping to increase the performance of the wireless communications device.
摘要翻译：一种用于包装内信号自适应均衡的系统和方法。一种用于操作具有发射机和接收机的无线通信设备的方法，包括在接收机处接收发送的信号，其中发送信号的接收是通过互感发生的，将所接收的发送信号转换成基带信号，使基带信号均衡，从均衡的基带信号计算校正信号，并向发射机提供校正信号。基带信号的均衡有助于消除或减少由发射机和接收机之间的互感引起的多径。消除多路径有助于提高校正信号的质量，从而有助于提高无线通信设备的性能。

70. 发明申请

US20090061809A1 METHODS AND APPARATUS TO IMPLEMENT RECEIVER LINEARITY ENHANCEMENT 有权
标题翻译：实现接收器线性增强的方法和设备
公开(公告)号：US20090061809A1
公开(公告)日：2009-03-05
申请号：US11847080
申请日：2007-08-29
申请人： Khurram Muhammad , Chandana Fernando
发明人： Khurram Muhammad , Chandana Fernando
IPC分类号： H04B1/26
CPC分类号： H03G3/3068 , H03G7/00
摘要： Methods and apparatus to implement receiver linearity enhancement are described. One example method includes controlling receiver gain by determining a level of a received signal that is to be provided to a radio frequency component; determining if the level of the received signal would cause the radio frequency components internally generated noise to increase; and when the level of the received signal would cause the radio frequency components internally generated noise to increase, reducing the level of the received signal prior to providing the received signal to the radio frequency component.
摘要翻译：描述了实现接收机线性增强的方法和装置。一个示例性方法包括通过确定要提供给射频分量的接收信号的电平来控制接收机增益; 确定接收信号的电平是否会导致射频分量内部产生的噪声增加; 并且当接收信号的电平将导致射频分量内部产生的噪声增加时，在将接收到的信号提供给射频分量之前，减小接收信号的电平。

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