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41. 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。

42. 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。

43. 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。

44. 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。

45. 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。

46. 发明授权

US07639082B2 System and method for amplifier gain measurement and compensation 有权
标题翻译：放大器增益测量和补偿的系统和方法
公开(公告)号：US07639082B2
公开(公告)日：2009-12-29
申请号：US11847961
申请日：2007-08-30
申请人： Khurram Muhammad , Dirk Leipold , Chandana Fernando
发明人： Khurram Muhammad , Dirk Leipold , Chandana Fernando
IPC分类号： H03F3/04
CPC分类号： H03G3/30 , H03F3/19 , H03F2200/294 , H03F2200/336 , H03F2200/468
摘要： A system and method for amplifier gain measurement and compensation. A method for compensating a signal gain of an amplifier circuit includes determining a desired gain for the amplifier circuit, determining an operating temperature of the amplifier circuit, adjusting a set of signal gains based on the operating temperature to produce a set of adjusted signal gains, determining a desired gain setting based on the desired gain and the set of signal gains, and providing the desired gain setting to the amplifier circuit.
摘要翻译：一种用于放大器增益测量和补偿的系统和方法。用于补偿放大器电路的信号增益的方法包括确定放大器电路的期望增益，确定放大器电路的工作温度，基于工作温度调整一组信号增益以产生一组经调整的信号增益，基于期望的增益和所述一组信号增益确定期望的增益设置，以及向放大器电路提供期望的增益设置。

47. 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。

48. 发明授权

US07519135B2 Direct radio frequency (RF) sampling with recursive filtering method 有权
标题翻译：直接射频（RF）采样采用递归滤波法
公开(公告)号：US07519135B2
公开(公告)日：2009-04-14
申请号：US10190867
申请日：2002-07-08
申请人： Robert B. Staszewski , Khurram Muhammad , Kenneth J. Maggio , Dirk Leipold
发明人： Robert B. Staszewski , Khurram Muhammad , Kenneth J. Maggio , Dirk Leipold
IPC分类号： H03K5/01
CPC分类号： H03D7/125 , H04B1/1036
摘要： A radio receiver 2000 with a sampling mixer 1100 for creating a discrete-time sample stream by directly sampling an RF current with history and rotating capacitors 1111 and 1112, wherein the accumulated charge on the rotating capacitors is read-out to produce a sample. The mixer provides immunity to noise glitches by predicting the occurrence of the glitch (or detecting a significant difference between observed and predicted samples) and creating corrected samples for the corrupted samples. These corrected samples can be created with special circuitry 1933 (digital) or in the mixer 1100 (analog).
摘要翻译：具有采样混合器1100的无线电接收机2000，用于通过用历史和旋转电容器1111和1112直接采样RF电流来产生离散时间采样流，其中读出旋转电容器上的累积电荷以产生样本。混合器通过预测毛刺的发生（或检测观察到的和预测的样品之间的显着差异）并为损坏的样品产生校正的样品来提供对噪声毛刺的免疫。这些校正样本可以用专用电路1933（数字）或混合器1100（模拟）来创建。

49. 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。

50. 发明申请

US20080113628A1 Methods and apparatus to provide an auxiliary receive path to support transmitter functions 有权
标题翻译：提供辅助接收路径以支持发射机功能的方法和装置
公开(公告)号：US20080113628A1
公开(公告)日：2008-05-15
申请号：US11595101
申请日：2006-11-09
申请人： Khurram Muhammad , Dirk Leipold
发明人： Khurram Muhammad , Dirk Leipold
IPC分类号： H04B1/40
CPC分类号： H04B1/52
摘要： Methods and apparatus to provide an auxiliary receive path to support transmitter functions are disclosed. An example transceiver includes an antenna and a duplexer coupled to the antenna. A transmitter is coupled to the duplexer to output a transmit signal at a transmit frequency. A receiver is coupled to the duplexer to receive a received signal at a receiver frequency. A signal processor is coupled to the transmitter and receiver. An auxiliary receiver is communicatively coupled to the signal processor to receive the transmit signal output from the transmitter and send an auxiliary receiver signal to the signal processor. The signal processor adjusts the transmit signal based on the auxiliary receiver signal.
摘要翻译：公开了提供辅助接收路径以支持发射机功能的方法和装置。示例收发器包括耦合到天线的天线和双工器。发射机耦合到双工器以以发射频率输出发射信号。接收机耦合到双工器以在接收机频率处接收接收的信号。信号处理器耦合到发射机和接收机。辅助接收器通信地耦合到信号处理器以接收从发射机输出的发射信号，并向辅助接收机信号发送信号处理器。信号处理器根据辅助接收机信号调整发射信号。

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