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31. 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。

32. 发明授权

US08054912B2 Large-dynamic-range lookup table for a transmitter predistorter and system and method employing the same 有权
标题翻译：用于发射机预失真器的大型动态范围查找表以及采用该方法的系统和方法
公开(公告)号：US08054912B2
公开(公告)日：2011-11-08
申请号：US12142890
申请日：2008-06-20
申请人： Seydou N. Ba , Khurram Waheed
发明人： Seydou N. Ba , Khurram Waheed
IPC分类号： H04K1/02 , H04L25/03 , H04L24/49
CPC分类号： H03F1/3247 , H03F1/3294 , H03F3/19 , H03F2201/3233
摘要： A predistorters for use with a nonlinear element and methods of predistorting for a nonlinear element for use in a 3G, e.g., WCDMA transmitter. In one embodiment, the predistorter includes: (1) a lookup table having non-uniformly spaced entries therein, (2) a compander configured to compand an input signal based on a nonlinearity of the nonlinear element to address the entries and (3) an interpolation offset calculation circuit associated with the lookup table and configured to produce an output based on a value of the input signal and a linear interpolation involving at least two entries from the lookup table.
摘要翻译：用于非线性元件的预失真器和用于3G（例如WCDMA发射机）中的非线性元件的预失真的方法。在一个实施例中，预失真器包括：（1）在其中具有非均匀间隔的条目的查找表，（2）压缩器，被配置为基于非线性元件的非线性来对输入信号进行补偿以解决条目;（3）内插偏移计算电路，其与查找表相关联并被配置为基于输入信号的值产生输出，以及涉及来自查找表的至少两个条目的线性内插。

33. 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。

34. 发明授权

US07714665B2 Harmonic characterization and correction of device mismatch 有权
标题翻译：器件不匹配的谐波特性和校正
公开(公告)号：US07714665B2
公开(公告)日：2010-05-11
申请号：US11618605
申请日：2006-12-29
申请人： Khurram Waheed , Robert B. Staszewski
发明人： Khurram Waheed , Robert B. Staszewski
IPC分类号： H03L7/099
CPC分类号： H03L7/099 , H03L7/10 , H03L2207/50
摘要： An apparatus and method fore harmonic characterization and ratio correction of device mismatch between coarse and fine varactor tuning devices within a segmented unified varactor bank of an (RF) digitally controlled oscillator (DCO). The DCO is divided into an MSB bank, LSB bank and sigma-delta (SD-LSB) bank. Any ratio mismatches between MSBs and LSBs are digitally calibrated out using a DCO step-size pre-distortion scheme wherein LSB steps are adjusted to account for ratio mismatch between the MSB/LSB step sizes. A harmonic characterization technique is used to estimate the mismatches in the minimal size CMOS tuning varactors of a digitally controlled RF oscillator (DCO), wherein nominal ratio mismatch between the MSB and LSB devices is estimated using hybrid stochastic gradient DCO gain estimation algorithms. The nominal ratio mismatch and the mismatches in MSB and LSB banks are used to determine average MSB/LSB mismatch which is then used to correct the LSB steps.
摘要翻译：一种用于（RF）数字控制振荡器（DCO）的分段统一变容管组内的粗调和微分变容二极管调谐装置之间的谐波表征和比率校正的装置和方法。 DCO分为MSB组，LSB组和Σ-Δ（SD-LSB）组。使用DCO步长预失真方案对MSB和LSB之间的任何比例不匹配进行数字校准，其中调整LSB步长以考虑MSB / LSB步长之间的比率失配。使用谐波表征技术来估计数字控制RF振荡器（DCO）的最小尺寸CMOS调谐变容二极管中的不匹配，其中使用混合随机梯度DCO增益估计算法来估计MSB和LSB器件之间的标称比率失配。标称比例失配和MSB和LSB组中的不匹配用于确定平均MSB / LSB失配，然后用于校正LSB步长。

35. 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。

36. 发明申请

US20100035554A1 Adaptive Complex Gain Predistorter for a Transmitter 有权
标题翻译：发射机的自适应复增益预失真器
公开(公告)号：US20100035554A1
公开(公告)日：2010-02-11
申请号：US12413109
申请日：2009-03-27
申请人： Seydou Nourou Ba , Khurram Waheed
发明人： Seydou Nourou Ba , Khurram Waheed
IPC分类号： H04B15/00
CPC分类号： H03F1/3247 , H03F3/24 , H03F2201/3233
摘要： Symbols are transmitted in a Cartesian transmitter by pre-distorting an input signal X having in-phase and quadrature components using a first compensation lookup table operable to hold complex valued entries to carry out in-phase and quadrature compensation pre-distortion with respect to the input signal to form a pre-distorted signal Z. The pre-distorted signal Z is processed to form an output signal Y using a nonlinear element. A complex gain normalization parameter adaptively updated to reflect varying gain of a linear region of the nonlinear element. A normalized feed back signal {tilde over (Y)} is formed using the adaptively updated complex gain normalization parameter. The first compensation lookup table is updated based on the pre-distorted input signal Z and the adaptively normalized feedback signal {tilde over (Y)}.
摘要翻译：通过使用第一补偿查找表对具有同相和正交分量的输入信号X进行预失真，在笛卡尔发射机中发送符号，该第一补偿查找表可操作以保持复数值条目，以相对于相位和正交分量执行同相和正交补偿预失真输入信号以形成预失真信号Z.预失真信号Z被处理以使用非线性元件形成输出信号Y. 复增益归一化参数自适应地更新以反映非线性元件的线性区域的变化增益。使用自适应更新的复数增益归一化参数形成归一化的反馈信号{波前（（Y）}）。第一补偿查找表基于预失真的输入信号Z和自适应归一化的反馈信号{波前（Y）}来更新。

37. 发明申请

US20090054018A1 System And Method For Power Control In A Wireless Transmitter 有权
标题翻译：无线发射机功率控制系统与方法
公开(公告)号：US20090054018A1
公开(公告)日：2009-02-26
申请号：US12235340
申请日：2008-09-22
申请人： Khurram Waheed , Tim Foo
发明人： Khurram Waheed , Tim Foo
IPC分类号： H04B1/04
CPC分类号： H03G3/3047
摘要： A system and method for power control in a wireless transmitter. A power control loop includes a feed forward unit coupled to a data source, the feed forward unit processes a signal for transmission, a feedback unit coupled to the feed forward unit, the feedback unit generates a feedback signal representative of an output power level of the signal transmitted by the feed forward unit, a closed loop power control unit coupled to the feedback unit and to the feed forward unit, the closed loop power control unit generates an additive correction signal based on an error signal computed from the feedback signal and data provided by the data source or software instructions, and a ramp path power control unit coupled to the data source, the ramp path power control unit generates a multiplicative correction signal based on an additive correction signal and data provided by the data source.
摘要翻译：一种用于无线发射机功率控制的系统和方法。功率控制回路包括耦合到数据源的前馈单元，所述前馈单元处理用于传输的信号，耦合到所述前馈单元的反馈单元，所述反馈单元生成表示所述前馈单元的输出功率水平的反馈信号由前馈单元发送的信号，耦合到反馈单元和前馈单元的闭环功率控制单元，闭环功率控制单元基于从反馈信号计算的误差信号和提供的数据产生加法校正信号通过数据源或软件指令以及耦合到数据源的斜坡路径功率控制单元，斜坡路径功率控制单元基于加法校正信号和由数据源提供的数据产生乘法校正信号。

38. 发明申请

US20090054000A1 Apparatus and Method for Adaptive Polar Transmitter Linearization and Wireless Transmitter Employing the Same 有权
标题翻译：自适应极性发射机线性化和无线发射机的装置和方法
公开(公告)号：US20090054000A1
公开(公告)日：2009-02-26
申请号：US12193186
申请日：2008-08-18
申请人： Khurram Waheed , Seydou N. Ba
发明人： Khurram Waheed , Seydou N. Ba
IPC分类号： H04B15/00
CPC分类号： H04B1/0475 , H03F1/3241 , H04B2001/0425
摘要： A polar transmitter and a method of linearizing a polar transmitter. In one embodiment, the transmitter includes: (1) a transmit chain having a predistorter configured to employ first amplitude and phase compensation lookup tables to carry out predistortion in the transmit chain, (2) a receiver coupled to the transmit chain and (3) predistortion compensation circuitry associated with the receiver and configured to update second amplitude and phase compensation lookup tables associated therewith based on at least one signal from the transmit chain, the values in the updated second amplitude and phase compensation lookup tables thereby available for subsequent predistortion.
摘要翻译：极性发射机和极化发射机的线性化方法。在一个实施例中，发射机包括：（1）具有预失真器的发射链，其被配置为采用第一幅度和相位补偿查找表来在发射链中执行预失真，（2）耦合到所述发射链的接收机，以及（3）与所述接收机相关联并且被配置为基于来自所述发射链的至少一个信号来更新与其相关联的第二幅度和相位补偿查找表的预失真补偿电路，所述更新的第二幅度和相位补偿查找表中的值由此可用于随后的预失真。

39. 发明申请

US20080218282A1 Hybrid Stochastic Gradient Based Digitally Controlled Oscillator Gain KDCO Estimation 有权
标题翻译：混合随机梯度数字控制振荡器增益KDCO估计
公开(公告)号：US20080218282A1
公开(公告)日：2008-09-11
申请号：US12111813
申请日：2008-04-29
申请人： Khurram Waheed , Robert B. Staszewski
发明人： Khurram Waheed , Robert B. Staszewski
IPC分类号： H03L7/099
CPC分类号： H03B5/04 , H03L2207/50
摘要： A novel hybrid stochastic gradient adaptation apparatus and method for calibrating the gain of an RF or non-RF digitally controlled oscillator (DCO). The adaptation algorithm determines a true stochastic gradient between a forcing function and its corresponding system measure to estimate the system parameters being adapted. A momentum term is generated and injected into the adaptation algorithm in order to stabilize the algorithm by adding inertia against any large transient variations in the input data. In the case of adaptation of DCO gain KDCO, the algorithm determines the stochastic gradient between time varying calibration or actual modulation data and the raw phase error accumulated in an all digital phase locked loop (ADPLL). Two filters preprocess the observable data to limit the bandwidth of the computed stochastic gradient providing a trade-off between sensitivity and settling time.
摘要翻译：一种用于校准RF或非RF数字控制振荡器（DCO）的增益的新型混合随机梯度自适应装置和方法。自适应算法确定强制功能与其对应的系统测量之间的真实随机梯度，以估计适应的系统参数。产生动量项并将其注入到自适应算法中，以通过对输入数据中的任何大的瞬态变化添加惯性来稳定算法。在适应DCO增益K DC DC的情况下，算法确定时变校准或实际调制数据与在所有数字锁相环（ADPLL）中累积的原始相位误差之间的随机梯度。两个滤波器预处理可观测数据，以限制计算出的随机梯度的带宽，从而提供灵敏度和建立时间之间的折衷。

40. 发明申请

US20080068236A1 Adaptive spectral noise shaping to improve time to digital converter quantization resolution using dithering 有权
标题翻译：自适应光谱噪声整形，以改善使用抖动的数字转换器量化分辨率的时间
公开(公告)号：US20080068236A1
公开(公告)日：2008-03-20
申请号：US11853182
申请日：2007-09-11
申请人： Mahbuba Moyeena Sheba , Robert B. Staszewski , Khurram Waheed
发明人： Mahbuba Moyeena Sheba , Robert B. Staszewski , Khurram Waheed
IPC分类号： H03M1/20 , H03M1/06
CPC分类号： G04F10/005
摘要： A novel and useful apparatus for and method of improving the quantization resolution of a time to digital converter in a digital PLL using noise shaping. The TDC quantization noise shaping scheme is effective to reduce the TDC quantization noise to acceptable levels especially in the case of integer-N channel operation. The mechanism monitors the output of the TDC circuit and adaptively generates a dither (i.e. delay) sequence based on the output. The dither sequence is applied to the frequency reference clock used in the TDC which adjusts the timing alignment between the edges of the frequency reference clock and the RF oscillator clock. The dynamic alignment changes effectively shape the quantization noise of the TDC. By shaping the quantization noise, a much finer in-band TDC resolution is achieved resulting in the quantization noise being pushed out to high frequencies where the PLL low pass characteristic effectively filters it out.
摘要翻译：一种用于提高使用噪声整形的数字PLL中的时间到数字转换器的量化分辨率的新颖有用的装置和方法。 TDC量化噪声整形方案有效地将TDC量化噪声降低到可接受的水平，特别是在整数N信道操作的情况下。该机制监视TDC电路的输出，并根据输出自适应地生成抖动（即延迟）序列。抖动序列被应用于TDC中使用的频率参考时钟，该频率参考时钟调整频率参考时钟的边沿与RF振荡器时钟之间的定时对准。动态对准改变有效地塑造了TDC的量化噪声。通过整形量化噪声，实现了更精细的带内TDC分辨率，导致量化噪声被推出到高频，其中PLL低通特性有效地滤除它。

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