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81. 发明授权

US08594579B2 Wireless communications device with impairment compensation and associated methods 有权
标题翻译：具有减值补偿和相关方法的无线通信设备
公开(公告)号：US08594579B2
公开(公告)日：2013-11-26
申请号：US13225783
申请日：2011-09-06
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H04B1/00 , H04B7/14
CPC分类号： H04B15/04
摘要： A mobile wireless communications device includes a transceiver, an auxiliary receiver and a controller. The transceiver includes a transmitter and a receiver. The transmitter upconverts a transmit baseband modulated signal and generates an RF modulated signal having a transmit impairment. The auxiliary receiver is coupled to the transmitter and downconverts the RF modulated signal and generates a receive baseband modulated signal having a receive impairment therein spectrally separated from the transmit impairment. The controller is coupled to the transmitter and the auxiliary receiver and estimates the transmit impairment while ignoring the receive impairment based on comparing the transmit baseband modulated signal with the receive baseband modulated signal. The controller generates an impairment compensation signal based upon the estimated transmit impairment.
摘要翻译：移动无线通信设备包括收发机，辅助接收机和控制器。收发器包括发射机和接收机。发射机上变频发射基带调制信号并产生具有发射损伤的RF调制信号。辅助接收机耦合到发射机并且对RF调制信号进行下变频，并产生具有与发射损伤频谱分离的接收损害的接收基带调制信号。控制器耦合到发射机和辅助接收机，并基于将发射基带调制信号与接收基带调制信号进行比较来估计发射损伤，同时忽略接收损害。控制器基于估计的发射损伤产生减值补偿信号。

82. 发明申请

US20130095777A1 METHODS AND APPARATUS FOR POWER CONTROL 有权
标题翻译：功率控制的方法和装置
公开(公告)号：US20130095777A1
公开(公告)日：2013-04-18
申请号：US13273768
申请日：2011-10-14
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H04B1/02 , H04W52/08
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。

83. 发明授权

US08055231B2 RF feedback engine coupled to receiver low noise amplifier 有权
标题翻译： RF反馈引擎耦合到接收机低噪声放大器
公开(公告)号：US08055231B2
公开(公告)日：2011-11-08
申请号：US12949461
申请日：2010-11-18
申请人： Khurram Muhammad , Meng-Chang Lee , Dirk Leipold
发明人： Khurram Muhammad , Meng-Chang Lee , Dirk Leipold
IPC分类号： H04B1/06 , H04B7/00
CPC分类号： H04B1/28 , H03M1/183 , H04B1/0007
摘要： Methods and apparatus to perform radio frequency (RF) analog-to-digital conversion are described. According to one example, a receiver includes an amplifier to amplify received analog RF signals and a mixer-free circuit for converting the received analog RF signals to digital signals.
摘要翻译：描述了执行射频（RF）模数转换的方法和装置。根据一个示例，接收机包括用于放大接收到的模拟RF信号的放大器和用于将所接收的模拟RF信号转换为数字信号的无混频器电路。

84. 发明授权

US08045941B2 Methods and apparatus to implement receiver linearity enhancement 有权
标题翻译：实现接收机线性度增强的方法和装置
公开(公告)号：US08045941B2
公开(公告)日：2011-10-25
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： H04B7/00 , H04B17/00
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。

85. 发明授权

US07904048B2 Multi-tap direct sub-sampling mixing system for wireless receivers 有权
标题翻译：用于无线接收机的多抽头直接子采样混合系统
公开(公告)号：US07904048B2
公开(公告)日：2011-03-08
申请号：US11935318
申请日：2007-11-05
申请人： Meng-Chang Lee , Khurram Muhammad
发明人： Meng-Chang Lee , Khurram Muhammad
IPC分类号： H04B1/10 , H03B1/00
CPC分类号： H04B1/1027 , H03H15/02 , H03H19/004 , H03H19/008
摘要： A multi-tap direct sub-sampling mixing system for wireless receivers is provided with a dynamically configurable passive switched capacitor filter. A front end amplifier is connected to receive a signal. The passive switched capacitor filter is connected to receive the amplified signal and has an output for providing a filtered signal. The switched capacitor filter has at least two sections that are each operable as a pole, wherein a first section of the at least two sections has sets of at least two stacked capacitors interconnected with a set of switches operable to amplify in input voltage provided to an input of the first section in response to operation of the set of switches; and a back end section connected to the output of the switched capacitor filter to receive the filtered signal.
摘要翻译：无线接收器的多抽头直接子采样混合系统提供有动态可配置的无源开关电容滤波器。连接前端放大器以接收信号。无源开关电容滤波器被连接以接收放大的信号并具有用于提供滤波信号的输出。开关电容器滤波器具有至少两个部分，每个部分可用作极点，其中至少两个部分的第一部分具有由一组开关互连的至少两个堆叠电容器组，其可操作以在提供给响应于该组开关的操作而输入第一部分; 以及连接到开关电容滤波器的输出端以接收经滤波的信号的后端部分。

86. 发明申请

US20100167655A1 RF TRANSMISSION LEAKAGE MITIGATOR, METHOD OF MITIGATING AN RF TRANSMISSION LEAKAGE AND CDMA TRANCEIVER EMPLOYING THE SAME 有权
标题翻译： RF传输泄漏减轻器，减少RF传输泄漏的方法和使用其的CDMA检测器
公开(公告)号：US20100167655A1
公开(公告)日：2010-07-01
申请号：US12721930
申请日：2010-03-11
申请人： Khurram Muhammad , Dirk Leipold
发明人： Khurram Muhammad , Dirk Leipold
IPC分类号： H04B1/00
CPC分类号： H03C5/00 , H04B1/525 , H04B1/707
摘要： The present invention provides an RF transmission leakage mitigator for use with a full-duplex, wireless transceiver. In one embodiment, the RF transmission leakage mitigator includes an inversion generator configured to provide an RF transmission inversion signal of an interfering transceiver RF transmission to a receiving portion of the transceiver thereby creating a residual leakage signal. Additionally, the RF transmission leakage mitigator also includes a residual processor coupled to the inversion generator and configured to adjust the RF transmission inversion signal of the interfering transceiver RF transmission based on reducing the residual leakage signal to a specified level.
摘要翻译：本发明提供了一种与全双工无线收发器一起使用的RF传输泄漏缓解器。在一个实施例中，RF传输泄漏减轻器包括反相发生器，其被配置为将干扰收发器RF传输的RF发射反转信号提供给收发器的接收部分，从而产生残余泄漏信号。此外，RF传输泄漏缓解器还包括耦合到反向发生器并被配置为基于将剩余泄漏信号减小到指定电平来调整干扰收发器RF传输的RF发射反转信号的残余处理器。

87. 发明授权

US07741916B2 Reconfigurable circuit to compensate for a low noise amplification input matching variation and a method for its configuration 有权
标题翻译：可重构电路，以补偿低噪声放大输入匹配变化及其配置方法
公开(公告)号：US07741916B2
公开(公告)日：2010-06-22
申请号：US12032317
申请日：2008-02-15
申请人： Salvatore Pennisi , Khurram Muhammad
发明人： Salvatore Pennisi , Khurram Muhammad
IPC分类号： H03F3/191
CPC分类号： H03F1/56 , H03F3/193 , H03F2200/294 , H03F2200/387 , H03F2200/492
摘要： A method for changing an effective capacitance of an amplifier circuit having a match transistor and a coupled cascode transistor includes changing an on-state of at least one of a plurality of sub-transistors of the match transistor. The method further includes changing a transconductance of the match transistor as a function of the change of the on-state. The method further includes changing an equivalent resistance, as measured between a source and a drain of the cascode transistor, as a function of the change of the transconductance of the match transistor.
摘要翻译：用于改变具有匹配晶体管和耦合共源共栅晶体管的放大器电路的有效电容的方法包括改变匹配晶体管的多个子晶体管中的至少一个的导通状态。该方法还包括根据导通状态的变化来改变匹配晶体管的跨导。该方法还包括改变在共源共栅晶体管的源极和漏极之间测量的等效电阻，作为匹配晶体管的跨导的变化的函数。

88. 发明授权

US07706755B2 Digital, down-converted RF residual leakage signal mitigating RF residual leakage 有权
标题翻译：数字，降频转换的RF残留泄漏信号可减轻RF残留泄漏
公开(公告)号：US07706755B2
公开(公告)日：2010-04-27
申请号：US11270121
申请日：2005-11-09
申请人： Khurram Muhammad , Dirk Leipold
发明人： Khurram Muhammad , Dirk Leipold
IPC分类号： H04B1/40
CPC分类号： H03C5/00 , H04B1/525 , H04B1/707
摘要： The present invention provides an RF transmission leakage mitigator for use with a full-duplex, wireless transceiver. In one embodiment, the RF transmission leakage mitigator includes an inversion generator configured to provide an RF transmission inversion signal of an interfering transceiver RF transmission to a receiving portion of the transceiver thereby creating a residual leakage signal. Additionally, the RF transmission leakage mitigator also includes a residual processor coupled to the inversion generator and configured to adjust the RF transmission inversion signal of the interfering transceiver RF transmission based on reducing the residual leakage signal to a specified level.
摘要翻译：本发明提供了一种与全双工无线收发器一起使用的RF传输泄漏缓解器。在一个实施例中，RF传输泄漏减轻器包括反相发生器，其被配置为将干扰收发器RF传输的RF发射反转信号提供给收发器的接收部分，从而产生残余泄漏信号。此外，RF传输泄漏缓解器还包括耦合到反向发生器并被配置为基于将剩余泄漏信号减小到指定电平来调整干扰收发器RF传输的RF发射反转信号的残余处理器。

89. 发明申请

US20090196384A1 Direct Radio Frequency (RF) Sampling With Recursive Filtering Method 审中-公开
标题翻译：直接射频（RF）采样递归滤波方法
公开(公告)号：US20090196384A1
公开(公告)日：2009-08-06
申请号：US12334268
申请日：2008-12-12
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： H03D1/04
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。

90. 发明授权

US07532874B2 Offset balancer, method of balancing an offset and a wireless receiver employing the balancer and the method 有权
标题翻译：偏移平衡器，平衡偏移的方法和采用平衡器的无线接收器及其方法
公开(公告)号：US07532874B2
公开(公告)日：2009-05-12
申请号：US11270122
申请日：2005-11-09
申请人： Khurram Muhammad , Dirk Leipold
发明人： Khurram Muhammad , Dirk Leipold
IPC分类号： H04B7/00 , H04B1/10
CPC分类号： H03D3/008
摘要： The present invention provides an offset balancer for use with a differential mixer employing a wireless reception and an offset quantifier configured to indicate an existing DC offset of the mixer corresponding to an existing second-order intercept point applicable to the wireless reception. In one embodiment, the offset balancer includes an offset adjuster coupled to the offset quantifier and configured to provide an offset adjustment to the existing DC offset based on increasing the existing second-order intercept point.
摘要翻译：本发明提供一种与使用无线接收的差分混频器一起使用的偏移平衡器和配置为指示对应于可应用于无线接收的现有二阶截取点的混频器的现有DC偏移的偏移量化器。在一个实施例中，偏移平衡器包括偏移调整器，该偏移调整器耦合到偏移量化器并且被配置为基于增加现有的二阶截取点来提供对现有DC偏移的偏移调整。

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