公开(公告)号：US08711974B2

公开(公告)日：2014-04-29

申请号：US13102903

申请日：2011-05-06

申请人： Rajendra Kumar

发明人： Rajendra Kumar

IPC分类号： H04K1/02

CPC分类号： H03F1/3294 ,  H04L25/03834 ,  H04L27/367

摘要： Various embodiments are directed to a non-linear amplifier system comprising a reference output generator, an adaptive filter, a amplitude distortion (AM-AM) compensator, a phase distortion (AM-PM) compensator, an adaptive spectrum controller and a non-linear system. The reference output generator may receive an input signal and generating a reference output. The adaptive filter may generate a modified input signal based on the input signal and the reference output. The AM-AM compensator may act on the modified input signal to compensate for AM-AM distortion. The phase distortion (AM-PM) compensator may act on the modified input signal to compensate for AM-PM distortion. The adaptive spectrum controller may provide parameters to the adaptive filter to minimize the power spectral density (PSD) of an output of the non-linear amplifier system in a stop-band and maximize the PSD of the output of the non-linear amplifier system in a pass-band.

摘要翻译： 各种实施例涉及一种非线性放大器系统，包括参考输出发生器，自适应滤波器，幅度失真（AM-AM）补偿器，相位失真（AM-PM）补偿器，自适应频谱控制器和非线性 系统。 参考输出发生器可以接收输入信号并产生参考输出。 自适应滤波器可以基于输入信号和参考输出产生修改的输入信号。 AM-AM补偿器可以作用于修改的输入信号以补偿AM-AM失真。 相位失真（AM-PM）补偿器可以作用于修改的输入信号，以补偿AM-PM失真。 自适应频谱控制器可以向自适应滤波器提供参数以最小化非线性放大器系统在阻带中的输出的功率谱密度（PSD），并使非线性放大器系统的输出的PSD最大化 通带。

公开(公告)号：USRE44122E1

公开(公告)日：2013-04-02

申请号：US13209691

申请日：2003-08-14

申请人： Rajendra Kumar

发明人： Rajendra Kumar

IPC分类号： H04B1/38 ,  H04M1/00

CPC分类号： G06F3/0202 ,  G06F1/1626 ,  G06F1/1632

摘要： An apparatus and method are disclosed that can adapt off-the shelf PDA devices (90) to user input/output applications such as data entry applications and cellular phone applications. The resulting apparatus (10) may be sized and shaped to be durable and facilitate handheld operation when the user is mobile during use. The apparatus provides features required for portable data entry such as key entry, barcode scanning, radio frequency identification, and wireless local area network (LAN) as well as wide area network (WAN) communications. The apparatus may be operated (a) in a slave mode with inclusion of a PDA device (90) for use in certain input/output operations that are processor intensive as well as (b) in a stand-alone mode without inclusion of a PDA device (90) for use in certain other input/output operations that are not processor intensive.

公开(公告)号：US20120280749A1

公开(公告)日：2012-11-08

申请号：US13102903

申请日：2011-05-06

申请人： Rajendra Kumar

发明人： Rajendra Kumar

IPC分类号： H03F1/26

CPC分类号： H03F1/3294 ,  H04L25/03834 ,  H04L27/367

摘要： Various embodiments are directed to a non-linear amplifier system comprising a reference output generator, an adaptive filter, a amplitude distortion (AM-AM) compensator, a phase distortion (AM-PM) compensator, an adaptive spectrum controller and a non-linear system. The reference output generator may receive an input signal and generating a reference output. The adaptive filter may generate a modified input signal based on the input signal and the reference output. The AM-AM compensator may act on the modified input signal to compensate for AM-AM distortion. The phase distortion (AM-PM) compensator may act on the modified input signal to compensate for AM-PM distortion. The adaptive spectrum controller may provide parameters to the adaptive filter to minimize the power spectral density (PSD) of an output of the non-linear amplifier system in a stop-band and maximize the PSD of the output of the non-linear amplifier system in a pass-band.

摘要翻译： 各种实施例涉及一种非线性放大器系统，包括参考输出发生器，自适应滤波器，幅度失真（AM-AM）补偿器，相位失真（AM-PM）补偿器，自适应频谱控制器和非线性 系统。 参考输出发生器可以接收输入信号并产生参考输出。 自适应滤波器可以基于输入信号和参考输出产生修改的输入信号。 AM-AM补偿器可以作用于修改的输入信号以补偿AM-AM失真。 相位失真（AM-PM）补偿器可以作用于修改的输入信号，以补偿AM-PM失真。 自适应频谱控制器可以向自适应滤波器提供参数以最小化非线性放大器系统在阻带中的输出的功率谱密度（PSD），并使非线性放大器系统的输出的PSD最大化 通带。

公开(公告)号：US20110033003A1

公开(公告)日：2011-02-10

申请号：US12536078

申请日：2009-08-05

申请人： Rajendra Kumar

发明人： Rajendra Kumar

IPC分类号： H04L27/00 ,  H04L5/12

CPC分类号： H04L27/12 ,  H04L27/156

摘要： A receiver may comprise a complex mixer for converting the modulated signal to a complex modulated signal comprising a first in-phase component and a first quadrature component. The receiver may further comprise a digital demodulator. The digital demodulator may comprise at least one processor circuit programmed for applying a phase differencer for generating an output function in terms of a phase difference of the complex modulated signal. Applying the phase differencer may comprise converting the first in-phase component to a function of a phase difference of the first in-phase component expressed in digital time, and converting the first quadrature component to a function of the phase difference of the first quadrature component expressed in digital time. The at least one processor circuit of the digital demodulator may also be programmed for applying a four quadrant inverse tangent to the output function to generate the information signal.

摘要翻译： 接收机可以包括用于将调制信号转换成包括第一同相分量和第一正交分量的复调制信号的复合混频器。 接收机还可以包括数字解调器。 数字解调器可以包括至少一个处理器电路，其被编程用于施加相位差分器，用于根据复调制信号的相位差产生输出函数。 应用相位差分器可以包括将第一同相分量转换为以数字时间表示的第一同相分量的相位差的函数，并将第一正交分量转换为第一正交分量的相位差的函数 以数字时代表达。 数字解调器的至少一个处理器电路也可以被编程为向输出功能施加四象限反正切以产生信息信号。

公开(公告)号：USRE41797E1

公开(公告)日：2010-10-05

申请号：US12328871

申请日：2008-12-05

申请人： Rajendra Kumar ,  Tien M. Nguyen

发明人： Rajendra Kumar ,  Tien M. Nguyen

IPC分类号： H04B1/10

CPC分类号： H04L5/06

摘要： A polyphase channelizer converts an intermediate frequency wideband signal into a complex signal that is sampled by parallel analog-to-digital converters having a bank of samplers respectively clocked by staggered clocking signals for respective converters for feeding I and Q quadrature samples to a polyphase filter bank of finite impulse response filters driving a fast Fourier transform processor for providing channelized digital signal outputs. The parallel analog-to-digital converters can operate at lower speeds but are parallel connected for effectively operating at required higher speeds. The channelizer channelizes the wideband signal using a polyphase clock for enabling high speed sampling and converting through low speed parallel analog to digital converters.

摘要翻译： 多相通道器将中频宽带信号转换为由具有分别由交错时钟信号时钟的采样器组的并行模数转换器采样的复信号，用于各自的转换器，用于将I和Q正交采样馈送到多相滤波器组 驱动用于提供通道化数字信号输出的快速傅里叶变换处理器的有限脉冲响应滤波器。 并行模数转换器可以以较低的速度工作，但并联连接，以便以所需的更高速度进行有效的操作。 通道化器通过多相时钟通道化宽带信号，以实现高速采样和通过低速并行模数转换器进行转换。

公开(公告)号：US20100061487A1

公开(公告)日：2010-03-11

申请号：US12205448

申请日：2008-09-05

申请人： Rajendra Kumar ,  Ramses Diaz de Leon

发明人： Rajendra Kumar ,  Ramses Diaz de Leon

IPC分类号： H03D1/04

CPC分类号： H04L27/38 ,  H04L27/0014 ,  H04L2027/0026 ,  H04L2027/0055 ,  H04L2027/0067 ,  H04L2027/0069 ,  H04L2027/0087

摘要： An adaptive receiver to provide reliable estimates of the symbols for the high-order MQAM and MPSK modulated signals received in the presence of amplitude fading and phase dynamics induced due to time-varying atmospheric or terrestrial multipath fading encountered in wireless communication channels. The adaptive receiver encompasses an adaptive tracking loop comprised of adaptive channel fade envelope estimator derived from the high-order modulated signal, a novel phase detector to separately estimate the phase due to the fading channel and the reference oscillator from that due to the data modulation present in the received signal without the need of any pilot symbol or pilot carrier, and a Kalman filter, a fixed-lag smoother and a smoothed symbol detector.

摘要翻译： 一种自适应接收机，用于在存在由无线通信信道中遇到的随时间变化的大气或地面多径衰落引起的幅度衰落和相位动态的情况下提供用于高阶MQAM和MPSK调制信号的符号的可靠估计。 自适应接收机包括自适应跟踪环路，该自适应跟踪环路包括从高阶调制信号导出的自适应信道衰落包络估计器，一种新颖的相位检测器，用于分别估计由于衰落信道和参考振荡器引起的相位， 在接收信号中，不需要任何导频符号或导频载波，卡尔曼滤波器，固定延迟平滑器和平滑符号检测器。

公开(公告)号：US07509418B2

公开(公告)日：2009-03-24

申请号：US10179642

申请日：2002-06-25

申请人： Yong Yan ,  Zhichen Xu ,  Rajendra Kumar

发明人： Yong Yan ,  Zhichen Xu ,  Rajendra Kumar

IPC分类号： G06F15/173

CPC分类号： G06F8/00

摘要： A system for automatic management of an e-service which partitions an e-service life-cycle among operational functionalities and non-operational functionalities and tends to the operational functionalities, thereby reducing the development burden of an e-service and enabling e-service owners to stay more focused on business related issues. In addition, a system according to the present teachings facilitates the smooth transition among the phases of an e-service life-cycle and facilitates the partition of system functionality into physically distributed components.

摘要翻译： 一种用于自动管理电子服务的系统，其将电子服务生命周期划分在运营功能和非操作功能之间，并且倾向于运行功能，从而减少电子服务的开发负担并使得电子服务所有者 留意更多关注业务相关问题。 此外，根据本教导的系统有助于电子服务生命周期的各个阶段之间的平滑过渡，并且有助于将系统功能划分成物理分布的组件。

公开(公告)号：US07475419B1

公开(公告)日：2009-01-06

申请号：US10665879

申请日：2003-09-19

申请人： Sujoy Basu ,  Vanish Talwar ,  Rajendra Kumar

发明人： Sujoy Basu ,  Vanish Talwar ,  Rajendra Kumar

IPC分类号： G06F21/00

CPC分类号： H04L63/105 ,  H04L63/102 ,  H04L67/306

摘要： A system and method for controlling access in an interactive grid environment is disclosed. Embodiments of the present invention include a method for controlling remote desktop access provided by an interactive grid computing system comprising determining user policies based on a classification of a user and providing a dynamic user account to the user, wherein the dynamic user account is customized based on the user policies to limit access to resources accessible through a remote desktop.

摘要翻译： 公开了一种在交互式网格环境中控制访问的系统和方法。 本发明的实施例包括一种用于控制由交互式网格计算系统提供的远程桌面访问的方法，包括基于用户的分类确定用户策略并向用户提供动态用户帐户，其中基于 用户策略限制对通过远程桌面访问的资源的访问。

公开(公告)号：US20080320197A1

公开(公告)日：2008-12-25

申请号：US12202728

申请日：2008-09-02

申请人： Rajendra Kumar

发明人： Rajendra Kumar

IPC分类号： G06F13/00

CPC分类号： H04M1/0256 ,  B60R11/0252 ,  B60R2011/0029 ,  B60R2011/0071 ,  G06F1/1626 ,  G06F1/1632 ,  G06F1/1656 ,  H04M1/72527

摘要： The present invention relates in general to portable processor based devices that provide computing, communication or entertainment functionality. More particularly, the present invention pertains to portable processor based devices operable while being held in its user's hand and providing communications, organizer and/or entertainment functions, such as cellular telephones, palm-sized organizers, and MP3 players, and to portable processor based devices providing general computing capabilities, such as laptop or handheld personal computers (PC's). More specifically, the present invention relates to systems that detachably mate a plurality of portable processor based devices to provide their combined functionality in an integrated structure.

摘要翻译： 本发明一般涉及提供计算，通信或娱乐功能的基于便携式处理器的设备。 更具体地，本发明涉及基于便携式处理器的设备，其可操作在被保持在其用户的手中并且提供通信，组织者和/或娱乐功能，诸如蜂窝电话，掌上型组织器和MP3播放器，以及基于便携式处理器 提供通用计算功能的设备，如笔记本电脑或手持式个人计算机（PC）。 更具体地，本发明涉及可拆卸地配合多个基于便携式处理器的设备以在其集成结构中提供其组合功能的系统。

公开(公告)号：US07388881B2

公开(公告)日：2008-06-17

申请号：US11067968

申请日：2005-02-28

申请人： Roshan Rajendra Baliga ,  Rahul Garg ,  Rajendra Kumar

发明人： Roshan Rajendra Baliga ,  Rahul Garg ,  Rajendra Kumar

IPC分类号： H04J3/22

CPC分类号： H04L7/10 ,  H04B1/7073

摘要： A system for receiving and handling a scrambled input data signal that includes a preamble with a start of frame delimiter (SFD) initiates an SFD search on the scrambled input data, thereby attempting to save an initialization period. The initialization period may be of the order of 7 uS, and its saving results in improved timeline management enabling antenna diversity and the possible use of high performance algorithms. The system may use two parallel paths for signal processing, each having an SFD detector and a descrambler. If the detected SFD is short, then the second path is disabled, and if it is long, then the first parallel path is disabled. Alternatively, the first path can be used for a finite period of time (for e.g., 40 symbols) and if the SFD is still not detected, the first path is disabled, and the system uses only the second path.

摘要翻译： 用于接收和处理包括具有帧定界符（SFD）开始的前同步码的加扰输入数据信号的系统启动对加扰输入数据的SFD搜索，从而尝试保存初始化周期。 初始化时间可以是7μS的量级，并且其保存导致改进的时间线管理，使天线分集和可能使用高性能算法。 系统可以使用两个并行路径进行信号处理，每个路径都有一个SFD检测器和一个解扰器。 如果检测到的SFD短，则禁用第二条路径，如果长度不等，则第一条并行路径被禁用。 或者，第一路径可以用于有限的时间段（例如，40个符号），并且如果尚未检测到SFD，则禁用第一路径，并且系统仅使用第二路径。