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51. 发明授权

US08542616B2 Simultaneous multiple signal reception and transmission using frequency multiplexing and shared processing 有权
标题翻译：使用频率复用和共享处理的同时多信号接收和传输
公开(公告)号：US08542616B2
公开(公告)日：2013-09-24
申请号：US12250646
申请日：2008-10-14
申请人： Robert B. Staszewski , Khurram Muhammad , Dirk Leipold
发明人： Robert B. Staszewski , Khurram Muhammad , Dirk Leipold
IPC分类号： H04L5/14
CPC分类号： H04B1/0075 , H03D7/1441 , H03D7/1466 , H03D7/1483 , H03D7/165 , H03D2200/0025 , H03D2200/0047 , H03D2200/0074 , H03D2200/0084 , H03D2200/0088 , H04L5/06 , H04L5/143 , H04L27/3863 , H04L2027/0016
摘要： A novel mechanism for simultaneous multiple signal reception and transmission using frequency multiplexing and shared processing. Multiple RF signals, which may be of various wireless standards, are received using one or more shared processing blocks thereby significantly reducing chip space and power requirements. Shared components include local oscillators, analog to digital converters, digital RX processing and digital baseband processing. In operation, multiple RX front end circuits, one for each desired wireless signal, generate a plurality of IF signals that are frequency multiplexed and combined to create a single combined IF signal. The combined IF signal is processed by a shared processing block. Digital baseband processing is performed on each receive signal to generate respective data outputs. Further, simultaneous full-duplex transmission and reception is performed using a single local oscillator. The phase/frequency modulation of the frequency synthesizer used in the TX is removed from the local oscillator signal for use in the receiver.
摘要翻译：一种使用频率复用和共享处理同时进行多信号接收和传输的新颖机制。可以使用一个或多个共享处理块来接收可能具有各种无线标准的多个RF信号，从而显着减少芯片空间和功率需求。共享组件包括本地振荡器，模数转换器，数字RX处理和数字基带处理。在操作中，针对每个期望的无线信号的多个RX前端电路产生频率多路复用并组合以产生单个组合IF信号的多个IF信号。组合的IF信号由共享处理块处理。对每个接收信号执行数字基带处理，以产生相应的数据输出。此外，使用单个本地振荡器执行同时的全双工发送和接收。在TX中使用的频率合成器的相位/频率调制从本地振荡器信号中去除，以在接收机中使用。

52. 发明授权

US08494468B1 Mobile wireless communications device including sensing transistor and hysteretic comparator and related methods 有权
标题翻译：移动无线通信设备包括感应晶体管和滞后比较器及相关方法
公开(公告)号：US08494468B1
公开(公告)日：2013-07-23
申请号：US13360414
申请日：2012-01-27
申请人： Khurram Muhammad , Seong-Ryong Ryu
发明人： Khurram Muhammad , Seong-Ryong Ryu
IPC分类号： H04B1/16
CPC分类号： H04B1/04 , H03F1/0227 , H03F3/19 , H03F3/2173 , H03F3/245 , H03F2200/102 , H03F2200/432 , H03F2200/451 , H03F2200/462
摘要： A mobile wireless communications device may include a portable housing, and a supply modulator carried by the portable housing. The supply modulator may include an output node, a linear amplifier coupled to the output node, and a switching amplifier also coupled to the output node. The switching amplifier may include at least one sensing transistor configured to sense current output from the linear amplifier and generate a drive voltage, and a hysteretic comparator coupled to the at least one sensing transistor and configured to be driven by the drive voltage. The mobile wireless communications device may also include a radio frequency (RF) power amplifier coupled to the output node of the supply modulator, and a wireless transceiver carried by the portable housing and coupled to the RF power amplifier.
摘要翻译：移动无线通信设备可以包括便携式外壳和由便携式外壳承载的电源调制器。电源调制器可以包括输出节点，耦合到输出节点的线性放大器和还耦合到输出节点的开关放大器。开关放大器可以包括至少一个感测晶体管，其被配置为感测来自线性放大器的电流输出并产生驱动电压，以及耦合到至少一个感测晶体管并被配置为由驱动电压驱动的迟滞比较器。移动无线通信设备还可以包括耦合到电源调制器的输出节点的射频（RF）功率放大器和由便携式外壳承载并耦合到RF功率放大器的无线收发器。

53. 发明授权

US08306176B2 Fine-grained gear-shifting of a digital phase-locked loop (PLL) 有权
标题翻译：数字锁相环（PLL）的细粒度换档
公开(公告)号：US08306176B2
公开(公告)日：2012-11-06
申请号：US10464982
申请日：2003-06-19
申请人： Robert B. Staszewski , Dirk Leipold , Khurram Muhammad
发明人： Robert B. Staszewski , Dirk Leipold , Khurram Muhammad
IPC分类号： H03D3/24
CPC分类号： H03L7/107 , H03L7/087 , H03L7/093 , H03L2207/50
摘要： System and method for improving a digital PLL's performance by making fine grained adjustments to the loop gain. A preferred embodiment comprises a plurality of loop gain adjustors (such as loop gain adjustors 605, 606, 607, and 608) that can incrementally adjust the loop gain. The incrementally adjusted loop gains are sequentially brought on-line so that the loop gain of the digital PLL is slowly decreased. By slowly decreasing the loop gain, the digital PLL is less perturbed by smaller noise transients that would take time to settle. Hence, the digital PLL can quickly acquire a signal and then decrease its loop gain and hence its bandwidth when it only needs to track a signal. The reduced bandwidth also reduces the overall noise in the digital PLL that is due to the reference noise contribution.
摘要翻译：通过对环路增益进行细微调整来提高数字PLL性能的系统和方法。优选实施例包括可逐渐调节环路增益的多个环路增益调节器（例如环路增益调节器605,606,607和608）。递增调节的环路增益被顺序地串联在一起，使得数字PLL的环路增益缓慢降低。通过缓慢地减小环路增益，数字PLL不受较小的噪声瞬变扰动，这将需要一些时间来解决。因此，数字PLL可以快速获取信号，然后在仅需要跟踪信号时减小其环路增益，从而降低其带宽。降低的带宽也降低了由于参考噪声贡献而导致的数字PLL中的整体噪声。

54. 发明授权

US08131232B2 Method and apparatus for antenna tuning 有权
标题翻译：天线调谐的方法和装置
公开(公告)号：US08131232B2
公开(公告)日：2012-03-06
申请号：US12576317
申请日：2009-10-09
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H04B1/04
CPC分类号： H04B1/0458 , H03J2200/06
摘要： A method for tuning a transmitter in order to improve impedance matching to an antenna or to intermediate radio frequency stages uses an error detector that senses a deviation of the amplitude or phase angle of a load current of a power amplifier driver or of a power amplifier. A controller calculates a correction and dynamically adjusts tunable transmitter parameters, which may include values of components in matching networks or bias voltages in the power amplifier or the power amplifier driver, so as to reduce the deviation and thereby improve the impedance matching. The load current of the power amplifier may alternatively be sensed by measuring the duty cycle of its switching mode power supply. A transmitter having a power amplifier and one or more tunable circuit elements incorporates an error detector that senses the amplitude or phase of a load current and a controller that adjusts one or more tunable parameters to reduce impedance mismatch. An integrated circuit device suitable for use in a transmitter includes a power amplifier driver circuit and a detector circuit capable of sensing a load current, and a controller circuit that can adjust tunable parameters either within or external to the integrated circuit. By eliminating directional couplers and integrating the detectors and power amplifier drivers, the size, complexity, and cost of wireless transceivers can be reduced, while efficiency and power consumption are improved through the dynamic adjustment of operating points and impedance matching.
摘要翻译：用于调谐发射器以改善与天线或中间射频级的阻抗匹配的方法使用检测功率放大器驱动器或功率放大器的负载电流的幅度或相位角的偏差的误差检测器。控制器计算校正并动态调整可调谐发射机参数，其可以包括功率放大器或功率放大器驱动器中的匹配网络中的组件的值或偏置电压，以便减小偏差，从而改善阻抗匹配。功率放大器的负载电流可以替代地通过测量其开关模式电源的占空比来感测。具有功率放大器和一个或多个可调谐电路元件的发射器包括检测负载电流的幅度或相位的误差检测器和调节一个或多个可调参数以减少阻抗失配的控制器。适用于发射机的集成电路装置包括能够感测负载电流的功率放大器驱动电路和检测器电路，以及可以在集成电路内部或外部调整可调谐参数的控制器电路。通过消除定向耦合器并集成检测器和功率放大器驱动器，可以减少无线收发器的尺寸，复杂性和成本，同时通过动态调整工作点和阻抗匹配来提高效率和功耗。

55. 发明授权

US08000670B2 Removing close-in interferers through a feedback loop 有权
标题翻译：通过反馈回路消除紧密的干扰源
公开(公告)号：US08000670B2
公开(公告)日：2011-08-16
申请号：US11339386
申请日：2006-01-25
申请人： Robert B. Staszewski , Khurram Muhammad , Dirk Leipold
发明人： Robert B. Staszewski , Khurram Muhammad , Dirk Leipold
IPC分类号： H04B1/06
CPC分类号： H04B1/28 , H04B1/1036
摘要： System and method for elimination of close-in interferers through feedback. A preferred embodiment comprises an interferer predictor (for example, interferer predictor 840) coupled to a digital output of a direct RF radio receiver (for example, radio receiver 800). The interferer predictor predicts the presence of interferers and feeds the information back to a sampling unit (for example, sampling unit 805) through a feedback circuit (for example, feedback unit 845) through the use of charge sharing. The interferers are then eliminated in the sampling unit. Additionally, the number and placement of zeroes in a filter in the sampling unit is increased and changed through the implementation of arbitrary-coefficient finite impulse response filters.
摘要翻译：通过反馈消除接近干扰的系统和方法。优选实施例包括耦合到直接RF无线电接收机（例如，无线电接收机800）的数字输出的干扰源预测器（例如，干扰源预测器840）。干扰源预测器预测干扰源的存在，并且通过使用电荷共享通过反馈电路（例如，反馈单元845）将信息反馈给采样单元（例如，采样单元805）。然后在采样单元中消除干扰源。另外，通过执行任意系数有限脉冲响应滤波器来增加和改变采样单元滤波器中的零数和位置。

56. 发明授权

US07949323B1 Local oscillator leakage counterbalancing in a receiver 有权
标题翻译：接收机本地振荡器泄漏平衡
公开(公告)号：US07949323B1
公开(公告)日：2011-05-24
申请号：US11679101
申请日：2007-02-26
申请人： Khurram Muhammad , Chih-Ming Hung , Imtinan Elahi
发明人： Khurram Muhammad , Chih-Ming Hung , Imtinan Elahi
IPC分类号： H04B1/10
CPC分类号： H04B15/06 , H04B1/30
摘要： The present invention provides a local oscillator (LO) leakage controller for use with a receiver. In one embodiment, the LO leakage controller includes a comparison unit configured to process an LO leakage error signal from the receiver to provide a leakage cancellation signal. Additionally, the LO leakage controller also includes a leakage counterbalance unit coupled to the comparison unit and configured to adapt the leakage cancellation signal to the receiver to counterbalance LO leakage in the receiver.
摘要翻译：本发明提供了一种与接收机一起使用的本地振荡器（LO）泄漏控制器。在一个实施例中，LO泄漏控制器包括比较单元，其被配置为处理来自接收器的LO泄漏误差信号以提供泄漏消除信号。此外，LO泄漏控制器还包括耦合到比较单元并被配置为将泄漏抵消信号适配到接收器以抵消接收器中的LO泄漏的泄漏平衡单元。

57. 发明授权

US07916672B2 RF processor having internal calibration mode 有权
标题翻译： RF处理器具有内部校准模式
公开(公告)号：US07916672B2
公开(公告)日：2011-03-29
申请号：US12017514
申请日：2008-01-22
申请人： Imtinan Elahi , Khurram Muhammad
发明人： Imtinan Elahi , Khurram Muhammad
IPC分类号： H04B7/00 , H04B1/38 , H04B1/40
CPC分类号： H04B17/21 , H04B17/10
摘要： The present invention pertains to a method of calibrating reception properties of a radio frequency (RF) processor. The application describes two embodiments of the invention representing calibration of the properties using an auxiliary transmitter to generate a calibration signal internal to the RF processor.
摘要翻译：本发明涉及校准射频（RF）处理器的接收特性的方法。本申请描述了本发明的两个实施例，其表示使用辅助发射机来校准属性，以产生RF处理器内部的校准信号。

58. 发明申请

US20110065403A1 METHODS AND APPARATUS TO PERFORM RADIO FREQUENCY (RF) ANALOG-TO-DIGITAL CONVERSION 有权
标题翻译：执行无线电频率（RF）模拟到数字转换的方法和设备
公开(公告)号：US20110065403A1
公开(公告)日：2011-03-17
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
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。

59. 发明授权

US07852247B2 Mixed-signal filter 有权
标题翻译：混合信号滤波器
公开(公告)号：US07852247B2
公开(公告)日：2010-12-14
申请号：US11863999
申请日：2007-09-28
申请人： Khurram Muhammad , Yongtao Wang , Imtinan Elahi
发明人： Khurram Muhammad , Yongtao Wang , Imtinan Elahi
IPC分类号： H03M3/00
CPC分类号： H03M3/344 , H03M3/40 , H03M3/454 , H03M3/456
摘要： One embodiment of the invention includes a mixed-signal filter. The mixed-signal filter comprises an analog signal path configured to process a first analog signal and an analog-to-digital converter (ADC) configured to convert the processed first analog signal to a digital signal. The mixed-signal filter also comprises a programmable digital feedback filter configured to filter the digital signal and a digital-to-analog converter (DAC) configured to convert the filtered digital signal to a second analog signal. The mixed-signal filter further comprises a signal combiner configured to combine an analog input signal of the mixed-signal filter and the second analog signal to generate the first analog signal.
摘要翻译：本发明的一个实施例包括混合信号滤波器。混合信号滤波器包括被配置为处理第一模拟信号的模拟信号路径和被配置为将经处理的第一模拟信号转换为数字信号的模拟 - 数字转换器（ADC）。混合信号滤波器还包括被配置为对数字信号进行滤波的可编程数字反馈滤波器和被配置为将经滤波的数字信号转换为第二模拟信号的数模转换器（DAC）。混合信号滤波器还包括信号组合器，其被配置为组合混合信号滤波器的模拟输入信号和第二模拟信号以产生第一模拟信号。

60. 发明授权

US07822389B2 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：US07822389B2
公开(公告)日：2010-10-26
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： H04B1/44
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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