公开(公告)号：US20080228292A1

公开(公告)日：2008-09-18

申请号：US11717486

申请日：2007-03-12

申请人： Ajit Kumar Reddy

发明人： Ajit Kumar Reddy

IPC分类号： G05B13/02

CPC分类号： G05B21/02

摘要： A method for pre-distorting an input for a device is provided. A partial set of known data pairs is acquired during a closed-loop device calibration period. The partial set of known data pairs is searched for at least one missing data pair, and at least one data value is interpolated for the missing data pair. An augmented set of data pairs, including the known data pairs and the interpolated data value, is stored in a lookup table. During an open-loop operation period subsequent to the closed-loop device calibration period, the device input is pre-distorted based on the augmented set of data pairs stored in the lookup table.

摘要翻译： 提供了一种用于对设备的输入进行预失真的方法。 在闭环设备校准周期期间获取部分已知数据对的集合。 搜索部分已知数据对集合中的至少一个丢失数据对，并为缺失的数据对内插至少一个数据值。 包括已知数据对和内插数据值的增强数据集合被存储在查找表中。 在闭环设备校准周期之后的开环操作期间，设备输入基于存储在查找表中的增加的数据组集合被预失真。

公开(公告)号：US07974373B2

公开(公告)日：2011-07-05

申请号：US11717258

申请日：2007-03-13

申请人： Ajit Kumar Reddy

发明人： Ajit Kumar Reddy

IPC分类号： H04B1/10

CPC分类号： H03H17/0621 ,  H03H2218/12 ,  H04L25/03834 ,  H04L27/2003

摘要： A method and architecture for pulse shaping are provided. The architecture includes a pulse shaping filter having a plurality of memory elements and a plurality of taps connected to the plurality of memory elements wherein a total number of the plurality of taps is independent of a sampling rate. The pulse shaping filter further includes a selector configured to select outputs from the plurality of taps to define a pulse shaped output.

摘要翻译： 提供脉冲整形的方法和架构。 该架构包括具有多个存储器元件的脉冲整形滤波器和连接到多个存储器元件的多个抽头，其中多个抽头的总数独立于采样率。 脉冲整形滤波器还包括选择器，其被配置为选择来自多个抽头的输出以限定脉冲形输出。

公开(公告)号：US20080225935A1

公开(公告)日：2008-09-18

申请号：US11717258

申请日：2007-03-13

申请人： Ajit Kumar Reddy

发明人： Ajit Kumar Reddy

IPC分类号： H03H7/40

CPC分类号： H03H17/0621 ,  H03H2218/12 ,  H04L25/03834 ,  H04L27/2003

摘要： A method and architecture for pulse shaping are provided. The architecture includes a pulse shaping filter having a plurality of memory elements and a plurality of taps connected to the plurality of memory elements wherein a total number of the plurality of taps is independent of a sampling rate. The pulse shaping filter further includes a selector configured to select outputs from the plurality of taps to define a pulse shaped output.

摘要翻译： 提供脉冲整形的方法和架构。 该架构包括具有多个存储器元件的脉冲整形滤波器和连接到多个存储器元件的多个抽头，其中多个抽头的总数独立于采样率。 脉冲整形滤波器还包括选择器，其被配置为选择来自多个抽头的输出以限定脉冲形输出。

公开(公告)号：US20110085619A1

公开(公告)日：2011-04-14

申请号：US12969843

申请日：2010-12-16

申请人： Ajit Kumar Reddy ,  Qing Li ,  Walid Khairy Mohamed Ahmed

发明人： Ajit Kumar Reddy ,  Qing Li ,  Walid Khairy Mohamed Ahmed

IPC分类号： H04L25/03

CPC分类号： H04L27/367

摘要： A system is provided for processing a communication signal including a baseband amplitude component and a baseband phase component. The system includes an amplitude predictor configured for closed-loop pre-distortion of a baseband amplitude component, an amplitude lookup table configured for open-loop pre-distortion of the baseband amplitude component, and an amplitude interpolator configured to build up the amplitude lookup table during a closed-loop calibration period. The system also includes a phase predictor configured for closed-loop pre-distortion of a baseband phase component, a phase lookup table configured for open-loop pre-distortion of the baseband phase component, and a phase interpolator configured to build up the phase lookup table during a closed-loop calibration period.

摘要翻译： 提供一种用于处理包括基带振幅分量和基带相位分量的通信信号的系统。 该系统包括被配置用于基带幅度分量的闭环预失真的幅度预测器，配置用于基带振幅分量的开环预失真的幅度查找表，以及被配置为建立幅度查找表的振幅内插器 在闭环校准期间。 该系统还包括配置用于基带相位分量的闭环预失真的相位预测器，配置用于基带相位分量的开环预失真的相位查找表，以及配置成建立相位查找的相位内插器 在闭环校准期间。

公开(公告)号：US20080224750A1

公开(公告)日：2008-09-18

申请号：US11717427

申请日：2007-03-13

申请人： Ajit Kumar Reddy

发明人： Ajit Kumar Reddy

IPC分类号： H03H11/26

CPC分类号： H03H17/0027

摘要： A digital delay architecture and a digital delay method are provided. The digital delay architecture includes at least one shifter, at least one adder connected to the at least one shifter and a plurality of registers storing at least an output of the at least one adder and an original sampled signal. The plurality of registers are selectable to define a fractional delay value.

摘要翻译： 提供数字延迟架构和数字延迟方法。 数字延迟架构包括至少一个移位器，连接至该至少一个移位器的至少一个加法器和至少存储至少一个加法器的输出和原始采样信号的多个寄存器。 多个寄存器可选择以定义分数延迟值。

公开(公告)号：US07065145B2

公开(公告)日：2006-06-20

申请号：US09874876

申请日：2001-06-05

申请人： Ajit Kumar Reddy

发明人： Ajit Kumar Reddy

IPC分类号： H04L27/36 ,  H04L5/12

CPC分类号： H04L25/4921

摘要： A method and apparatus for carrierless amplitude and phase CAP encoding of data in a manner avoiding the use of pulse shaping filters for in-phase and quadrature impulse signals. Specifically, in-phase and quadrature vector arithmetic structures (VAS) to adapt respective in-phase and quadrature impulse components to produce appropriate shaped in-phase and quadrature components.

公开(公告)号：US07649428B2

公开(公告)日：2010-01-19

申请号：US11717370

申请日：2007-03-13

申请人： Ajit Kumar Reddy

发明人： Ajit Kumar Reddy

IPC分类号： H03C3/06

CPC分类号： H03L7/1976

摘要： A method and system for generating noise in a frequency synthesizer are provided. The method includes generating a noise portion of an input signal within the frequency synthesizer and appending the noise portion to a control portion of the input signal.

摘要翻译： 提供了一种用于在频率合成器中产生噪声的方法和系统。 该方法包括在频率合成器内产生输入信号的噪声部分，并将噪声部分附加到输入信号的控制部分。

公开(公告)号：US20080231381A1

公开(公告)日：2008-09-25

申请号：US11717370

申请日：2007-03-13

申请人： Ajit Kumar Reddy

发明人： Ajit Kumar Reddy

IPC分类号： H03L7/085

CPC分类号： H03L7/1976

摘要： A method and system for generating noise in a frequency synthesizer are provided. The method includes generating a noise portion of an input signal within the frequency synthesizer and appending the noise portion to a control portion of the input signal.

摘要翻译： 提供了一种用于在频率合成器中产生噪声的方法和系统。 该方法包括在频率合成器内产生输入信号的噪声部分，并将噪声部分附加到输入信号的控制部分。

公开(公告)号：US20080225984A1

公开(公告)日：2008-09-18

申请号：US12048022

申请日：2008-03-13

申请人： Walid Khairy Mohamed Ahmed ,  Qing Li ,  Ajit Kumar Reddy ,  Eoin Carey

发明人： Walid Khairy Mohamed Ahmed ,  Qing Li ,  Ajit Kumar Reddy ,  Eoin Carey

IPC分类号： H03C3/00 ,  H04L27/12 ,  H03K7/06

CPC分类号： H03K7/10 ,  H03C5/00 ,  H04L25/06 ,  H04L27/34 ,  H04L27/361 ,  H04L27/3863 ,  H04L27/389

摘要： A digital polar transmitter includes a baseband processor configured to receive an input signal and to convert the input signal into a baseband amplitude component and a baseband phase component. The transmitter also includes a phase modulator in communication with the baseband processor. The phase modulator is configured to modulate an RF carrier signal based on the phase component and to generate a phase-modulated RF carrier signal. A power amplifier is provided in communication with the baseband processor and the phase modulator. The power amplifier is configured to amplify the phase-modulated RF carrier signal based on the baseband amplitude component and to generate an amplified RF signal. The transmitter also includes a digital feedback loop in communication with the power amplifier and the baseband processor. The digital feedback loop is configured to detect the amplified RF signal and to provide a digital amplitude feedback signal and a detected phase feedback signal to the baseband processor.

摘要翻译： 数字极化发射机包括：基带处理器，被配置为接收输入信号并将输入信号转换成基带振幅分量和基带相位分量。 发射机还包括与基带处理器通信的相位调制器。 相位调制器被配置为基于相位分量来调制RF载波信号并且产生相位调制的RF载波信号。 提供与基带处理器和相位调制器通信的功率放大器。 功率放大器被配置为基于基带幅度分量来放大相位调制的RF载波信号并产生放大的RF信号。 发射机还包括与功率放大器和基带处理器通信的数字反馈回路。 数字反馈回路被配置为检测放大的RF信号，并向基带处理器提供数字幅度反馈信号和检测的相位反馈信号。

公开(公告)号：US20080225981A1

公开(公告)日：2008-09-18

申请号：US12048013

申请日：2008-03-13

申请人： Ajit Kumar Reddy ,  Qing Li ,  Walid Khairy Mohamed Ahmed

发明人： Ajit Kumar Reddy ,  Qing Li ,  Walid Khairy Mohamed Ahmed

IPC分类号： H04L25/49

CPC分类号： H04L27/367

摘要： A system is provided for processing a communication signal including a baseband amplitude component and a baseband phase component. The system includes an amplitude predictor configured for closed-loop pre-distortion of a baseband amplitude component, an amplitude lookup table configured for open-loop pre-distortion of the baseband amplitude component, and an amplitude interpolator configured to build up the amplitude lookup table during a closed-loop calibration period. The system also includes a phase predictor configured for closed-loop pre-distortion of a baseband phase component, a phase lookup table configured for open-loop pre-distortion of the baseband phase component, and a phase interpolator configured to build up the phase lookup table during a closed-loop calibration period.

摘要翻译： 提供一种用于处理包括基带振幅分量和基带相位分量的通信信号的系统。 该系统包括被配置用于基带幅度分量的闭环预失真的幅度预测器，配置用于基带振幅分量的开环预失真的幅度查找表，以及被配置为建立幅度查找表的振幅内插器 在闭环校准期间。 该系统还包括配置用于基带相位分量的闭环预失真的相位预测器，配置用于基带相位分量的开环预失真的相位查找表，以及配置成建立相位查找的相位内插器 在闭环校准期间。