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41. 发明申请

US20070105509A1 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，减轻RF传输泄漏的方法以及采用其的CDMA接收机
公开(公告)号：US20070105509A1
公开(公告)日：2007-05-10
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： H03C1/52 , H04B1/68
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。

42. 发明授权

US06791422B2 Frequency synthesizer with digitally-controlled oscillator 有权
标题翻译：具有数字控制振荡器的频率合成器
公开(公告)号：US06791422B2
公开(公告)日：2004-09-14
申请号：US10679792
申请日：2003-10-06
申请人： Robert B. Staszewski , Dirk Leipold , Khurram Muhammad , Chih-Ming Hung
发明人： Robert B. Staszewski , Dirk Leipold , Khurram Muhammad , Chih-Ming Hung
IPC分类号： H03L700
CPC分类号： H03C3/0975 , H03C3/0941 , H03C3/095 , H03C3/0958 , H03C3/0966 , H03K19/0016 , H03L7/085 , H03L7/087 , H03L7/091 , H03L7/093 , H03L7/099 , H03L7/16 , H03L2207/50 , H04L7/0029
摘要： A transmitter (10) based on a frequency synthesizer includes an LC tank (12) of a digitally controlled oscillator (DCO) with various arrays of capacitors. The LC tank 12 is divided into two major groups that reflect two general operational modes: acquisition and tracking. The first group (process/voltage/temperature and acquisition) approximately sets the desired center frequency of oscillation initially, while the second group (integer and fractional tracking) precisely controls the oscillating frequency during the actual operation. For highly accurate outputs, dynamic element matching (DEM) is used in the integer tracking controller to reduce non-linearities caused by non-uniform capacitor values. Also, a preferred range of the integer tracking capacitor array may be used for modulation after the selected channel has been acquired. A digital sigma-delta modulator circuit (50) drives a capacitor array (14d) in response to the fractional bits of the error word. On mode switches, the accumulated error is recalculated to a phase restart value to prevent perturbations.
摘要翻译：基于频率合成器的发射机（10）包括具有各种电容器阵列的数字控制振荡器（DCO）的LC箱（12）。液相色谱箱12分为反映两种一般操作模式的两个主要组：采集和跟踪。第一组（过程/电压/温度和采集）最初初始化设置所需的中心振荡频率，而第二组（整数和分数跟踪）在实际操作期间精确地控制振荡频率。对于高精度输出，在整数跟踪控制器中使用动态元件匹配（DEM）来减少由非均匀电容值引起的非线性。此外，在获取所选择的信道之后，整数跟踪电容器阵列的优选范围可以用于调制。数字Σ-Δ调制器电路（50）响应错误字的分数位驱动电容器阵列（14d）。在模式开关上，累加误差被重新计算到相位重启值，以防止扰动。

43. 发明申请

US20050036572A1 Method of rate conversion together with I-Q mismatch correction and sampler phase adjustment in direct sampling based down-conversion 审中-公开
标题翻译：速率转换方法与基于直接采样的下转换中的I-Q失配校正和采样器相位调整
公开(公告)号：US20050036572A1
公开(公告)日：2005-02-17
申请号：US10641235
申请日：2003-08-14
申请人： Khurram Muhammad , Robert Staszewski , Imtinan Elahi
发明人： Khurram Muhammad , Robert Staszewski , Imtinan Elahi
IPC分类号： H04B1/30 , H04L7/02 , H04L27/06
CPC分类号： H04L7/0029 , H04B1/30 , H04L7/007
摘要： A method of digital resampling converts a channel dependent rate to a fixed rate while correcting gain and phase mismatch between I and Q branches in the resampling process and adjusts the sampler phase for T-spaced equalization.
摘要翻译：数字重采样的方法将信道相关速率转换为固定速率，同时校正重采样过程中I和Q分支之间的增益和相位失配，并调整采样器相位进行T间隔均衡。

44. 发明申请

US20050025268A1 Active removal of aliasing frequencies in a decimating structure by changing a decimation ratio in time and space 有权
公开(公告)号：US20050025268A1
公开(公告)日：2005-02-03
申请号：US10924159
申请日：2004-08-23
申请人： Khurram Muhammad , Robert Staszewski , Gennady Feygin
发明人： Khurram Muhammad , Robert Staszewski , Gennady Feygin
IPC分类号： H03D7/12 , H04B1/10 , H03D1/24
CPC分类号： H03D7/125 , H04B1/1036
摘要： When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer 800 with capacitor banks 811 and 812 that are controlled by a digital control unit 820 with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.

45. 发明申请

US20050025269A1 Active removal of aliasing frequencies in a decimating structure by changing a decimation ratio in time and space 有权
标题翻译：通过在时间和空间上改变抽取比例，在抽取结构中主动去除混叠频率
公开(公告)号：US20050025269A1
公开(公告)日：2005-02-03
申请号：US10924297
申请日：2004-08-23
申请人： Khurram Muhammad , Robert Staszewski , Gennady Feygin
发明人： Khurram Muhammad , Robert Staszewski , Gennady Feygin
IPC分类号： H03D7/12 , H04B1/10 , H03D3/22
CPC分类号： H03D7/125 , H04B1/1036
摘要： When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer 800 with capacitor banks 811 and 812 that are controlled by a digital control unit 820 with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.
摘要翻译：当采样流被抽取时，来自期望频带外部的频率分量被混叠成所需频带，导致信息的干扰和丢失。不同的抽取率导致不同的频率混叠成所需的频带。具有电容器组811和812的电流模式采样混频器800能够以不同的抽取率对能够集成和抽取RF电流的数字控制单元820进行控制，能够以不同的抽取率来测量频谱。然后分析测量的频谱以检测混叠到期望频带中的干扰源的存在。然后可以消除或避免干扰源。

46. 发明申请

US20050025270A1 Active removal of aliasing frequencies in a decimating structure by changing a decimation ratio in time and space 有权
公开(公告)号：US20050025270A1
公开(公告)日：2005-02-03
申请号：US10924303
申请日：2004-08-23
申请人： Khurram Muhammad , Robert Staszewski , Gennady Feygin
发明人： Khurram Muhammad , Robert Staszewski , Gennady Feygin
IPC分类号： H03D7/12 , H04B1/10 , H03D3/22
CPC分类号： H03D7/125 , H04B1/1036
摘要： When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer 800 with capacitor banks 811 and 812 that are controlled by a digital control unit 820 with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.

47. 发明授权

US09088320B2 Transmitter with pre-distortion module, a method thereof 有权
标题翻译：具有预失真模块的发射机，其方法
公开(公告)号：US09088320B2
公开(公告)日：2015-07-21
申请号：US13688609
申请日：2012-11-29
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H04B1/04 , H03F1/32
CPC分类号： H04B1/0475 , H03F1/3241 , H04B2001/0425
摘要： Aspects of the disclosure provide a transmitter that includes a pre-distortion module and a phase controller. The pre-distortion module is configured to receive a first digital value and generate a first pre-distorted digital value based on the first digital value and a corresponding angle. The first digital value is a combination of an in-phase component and a quadrature component of a signal for transmission. The phase controller is configured to control an amplifier to drive a current according to the first pre-distorted digital value and phase information in relation to the first digital value during a first phase range of a carrier signal determined at least partially based on the angle.
摘要翻译：本公开的方面提供了包括预失真模块和相位控制器的发射机。预失真模块被配置为接收第一数字值并且基于第一数字值和相应的角度生成第一预失真数字值。第一数字值是用于传输的信号的同相分量和正交分量的组合。相位控制器被配置为在至少部分地基于角度确定的载波信号的第一相位范围内，根据第一预失真数字值和相对于第一数字值的相位信息来控制放大器来驱动电流。

48. 发明授权

US08792831B2 Wireless communications device with performance monitoring and associated methods 有权
标题翻译：无线通信设备，具有性能监控和相关方法
公开(公告)号：US08792831B2
公开(公告)日：2014-07-29
申请号：US13225762
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 comprising a transmitter and a receiver, an auxiliary receiver, and a controller. The transmitter is configured to upconvert a transmit baseband modulated signal and generate an RF modulated signal having a transmit impairment. The auxiliary receiver is configured to downconvert the RF modulated signal and generate a receive baseband modulated signal having the transmit impairment. The auxiliary receiver is selectively configured to operate based on a control signal in a single-mixer mode when the transmitter is selectively configured to operate in a dual-mixer mode, and in the dual-mixer mode when the transmitter is selectively configured to operate in the single-mixer mode. The controller is configured to compare the transmit baseband modulated signal to the transmit impairment to determine an error difference therebetween, and generate the control signal based on the error difference.
摘要翻译：移动无线通信设备包括收发器，包括发射机和接收机，辅助接收机和控制器。发射机被配置为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。辅助接收机被配置为下变频RF调制信号并产生具有发射损伤的接收基带调制信号。辅助接收机被选择性地配置为当发射机被选择性地配置为以双混频器模式工作时，并且当发射机被选择性地配置为在双混频器模式中操作时，基于单个混频器模式中的控制信号进行操作单混音模式。控制器被配置为将发射基带调制信号与发射损伤进行比较以确定它们之间的误差，并且基于误差产生控制信号。

49. 发明授权

US08553802B2 Quadrature communications device with I antennas and Q antennas and modulated power supply and related methods 有权
标题翻译：具有I天线和Q天线的正交通信设备和调制电源及相关方法
公开(公告)号：US08553802B2
公开(公告)日：2013-10-08
申请号：US13049200
申请日：2011-03-16
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H04L27/00
CPC分类号： H04L27/363 , H03L7/1974 , H04L27/2067 , H04L2027/0018
摘要： A communications device may include an In-phase (I) power amplifier configured to generate an I amplified signal, a Quadrature (Q) power amplifier configured to generate a Q amplified signal, an I digital-to-analog converter (DAC) configured to generate an I signal, and a Q DAC configured to generate a Q signal. The communications device may also include an I power supply circuit coupled to the I power amplifier and to the I DAC and configured to cause the I power amplifier to modulate an I carrier signal into the I amplified signal based upon the I signal, a Q power supply circuit coupled to the Q power amplifier and to the Q DAC and configured to cause the Q power amplifier to modulate a Q carrier signal into the Q amplified signal based upon the Q signal, and at least one antenna coupled to the I and Q power amplifiers.
摘要翻译：通信设备可以包括被配置为产生I放大信号的同相（I）功率放大器，被配置为产生Q放大信号的正交（Q）功率放大器，被配置为产生I信号和配置成产生Q信号的Q DAC。通信设备还可以包括耦合到I功率放大器和I DAC的I电源电路，并且被配置为使得I功率放大器基于I信号将I载波信号调制成I放大信号，Q功率电源电路耦合到Q功率放大器和Q DAC，并被配置为使得Q功率放大器基于Q信号将Q载波信号调制到Q放大信号中，并且至少一个天线耦合到I和Q功率放大器

50. 发明授权

US08462030B2 Programmable loop filter for use with a sigma delta analog-to-digital converter and method of programming the same 有权
标题翻译：用于Σ-Δ模数转换器的可编程环路滤波器及其编程方法
公开(公告)号：US08462030B2
公开(公告)日：2013-06-11
申请号：US10832531
申请日：2004-04-27
申请人： Khurram Muhammad
发明人： Khurram Muhammad
IPC分类号： H03M3/00
CPC分类号： H03M3/396 , H03M3/392 , H03M3/43
摘要： The present invention is directed to a programmable loop filter, a method of programming the same and a sigma delta analog-to-digital converter (ADC) incorporating the programmable loop filter or the method. In one embodiment, the programmable loop filter includes: (1) a configurable filter structure containing selectably interconnectable alternative filter elements and (2) a configuration controller coupled to the configurable filter structure and operable to interconnect at least a selected one of the filter elements to determine a transfer characteristic of the configurable filter structure and set an operating condition of the sigma delta ADC.
摘要翻译：本发明涉及一种可编程环路滤波器，其编程方法以及结合有可编程环路滤波器或该方法的Σ-Δ模数转换器（ADC）。在一个实施例中，可编程环路滤波器包括：（1）包含可选择地互连的替代滤波器元件的可配置滤波器结构，以及（2）耦合到可配置滤波器结构并且可操作以将至少一个所选滤波器元件互连到确定可配置滤波器结构的传输特性并设置Σ-ΔADC的工作状态。

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