公开(公告)号：US08284860B2

公开(公告)日：2012-10-09

申请号：US12262575

申请日：2008-10-31

Applicant: Bing Xu ,  Daniel B. Schwartz ,  Clive K. Tang

Inventor： Bing Xu ,  Daniel B. Schwartz ,  Clive K. Tang

IPC: H04L25/49 ,  H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B2001/0425

Abstract: Apparatus, systems, and methods are provided for controlling the output of a transmitter using a digital error signal. A method comprises generating a digital reference signal based on a baseband input signal and converting the digital reference signal to an analog reference signal. The method further comprises generating an analog error signal in response to a difference between the analog reference signal and an analog output signal. The method further comprises generating a digital error signal from the analog error signal, and generating an input signal for the transmitter based on the baseband input signal and the digital error signal.

Abstract translation: 提供装置，系统和方法，用于使用数字误差信号来控制发射机的输出。 一种方法包括基于基带输入信号产生数字参考信号并将数字参考信号转换为模拟参考信号。 该方法还包括响应于模拟参考信号和模拟输出信号之间的差异产生模拟误差信号。 该方法还包括从模拟误差信号产生数字误差信号，并且基于基带输入信号和数字误差信号产生用于发射机的输入信号。

公开(公告)号：US08014737B2

公开(公告)日：2011-09-06

申请号：US11722296

申请日：2004-12-23

Applicant: Patrick J. Pratt ,  Michael A. Milyard ,  Daniel B. Schwartz ,  Philip C. Warder

Inventor： Patrick J. Pratt ,  Michael A. Milyard ,  Daniel B. Schwartz ,  Philip C. Warder

IPC: H01Q11/12

CPC classification number: H03F1/32 ,  H03F1/0244 ,  H03F1/3247 ,  H03F1/3252 ,  H03F3/195 ,  H03F3/245

Abstract: A wireless communication unit comprises a transmitter having an analogue feedback power control loop with an input and a power amplifier having a power amplifier output, where the analogue feedback power control loop is arranged to feedback a signal to the input to set an output power level of the transmitter. The wireless communication unit further comprises an outer digital loop operably coupled from the power amplifier output to the transmitter.In this manner, the inner analogue loop is used to linearise a response obtained from the power amplifier and an outer digital loop wherein the outer digital loop controls the inner analogue loop with regard to saturation detection and correction as well as facilitating multi-mode operation of the wireless communication unit.

Abstract translation: 无线通信单元包括具有模拟反馈功率控制环路的发射机，具有输入端和功率放大器，功率放大器具有功率放大器输出，其中模拟反馈功率控制环路被布置成将信号反馈到输入端以设置输出功率电平 发射机。 无线通信单元还包括可操作地从功率放大器输出耦合到发射器的外部数字环路。 以这种方式，内部模拟环路用于线性化从功率放大器和外部数字环路获得的响应，其中外部数字环路相对于饱和度检测和校正控制内部模拟环路以及促进多模式操作 无线通信单元。

公开(公告)号：US08000665B2

公开(公告)日：2011-08-16

申请号：US12259867

申请日：2008-10-28

Applicant: Kenneth Stebbings ,  Vivek Bhan ,  Daniel B. Schwartz ,  Bing Xu

Inventor： Kenneth Stebbings ,  Vivek Bhan ,  Daniel B. Schwartz ,  Bing Xu

IPC: H03G3/00 ,  H04B1/04 ,  H04L25/03

CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/0266 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/24 ,  H03G3/3042 ,  H04B2001/045 ,  H04L27/368

Abstract: Systems and methods are provided for controlling headroom of an amplifier (e.g., in a transmitter). A method comprises obtaining a target output power for a current interval and obtaining a target headroom for a subsequent interval. The method continues by adjusting, during the current interval, the power output capability of the amplifier based on the target headroom and adjusting the input power of an input signal based on the target output power, such that the output power of the amplifier is substantially constant during the current interval as the power output capability of the amplifier is adjusted.

Abstract translation: 提供了用于控制放大器（例如，在发射机中）的余量的系统和方法。 一种方法包括获得当前间隔的目标输出功率并获得用于后续间隔的目标余量。 该方法通过在当前时间间隔期间基于目标余量调整放大器的功率输出能力并基于目标输出功率调整输入信号的输入功率，使得放大器的输出功率基本上恒定 在当前时间间隔内，调节放大器的功率输出能力。

公开(公告)号：US20100215133A1

公开(公告)日：2010-08-26

申请号：US12392841

申请日：2009-02-25

Applicant: Kenneth E. Stebbings ,  Vivek Bhan ,  Daniel B. Schwartz

Inventor： Kenneth E. Stebbings ,  Vivek Bhan ,  Daniel B. Schwartz

IPC: H04L7/00

CPC classification number: H04J3/0685 ,  H04B1/40

Abstract: Apparatus, systems, and methods are provided for transmitting messages over a serial interface. A method comprises receiving a first signal at a first time and receiving a second signal at a second time, the second time being after the first time. If a difference between the second time and the first time is less than a threshold time period, the method comprises generating a first message that is representative of the first signal and the second signal and transmitting the first message over the serial interface. In accordance with one embodiment, the threshold time period is equal to one half of an interface acquisition delay time period associated with the serial interface.

Abstract translation: 提供了用于通过串行接口发送消息的装置，系统和方法。 一种方法包括在第一时间接收第一信号并在第二时间接收第二信号，第二时间是在第一次之后。 如果第二时间和第一时间之间的差小于阈值时间段，则该方法包括生成表示第一信号和第二信号的第一消息，并通过串行接口发送第一消息。 根据一个实施例，阈值时间周期等于与串行接口相关联的接口获取延迟时间周期的一半。

公开(公告)号：US20100111238A1

公开(公告)日：2010-05-06

申请号：US12262575

申请日：2008-10-31

Applicant: Bing Xu ,  Daniel B. Schwartz ,  Clive K. Tang

Inventor： Bing Xu ,  Daniel B. Schwartz ,  Clive K. Tang

IPC: H03D1/04

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B2001/0425

Abstract: Apparatus, systems, and methods are provided for controlling the output of a transmitter using a digital error signal. A method comprises generating a digital reference signal based on a baseband input signal and converting the digital reference signal to an analog reference signal. The method further comprises generating an analog error signal in response to a difference between the analog reference signal and an analog output signal. The method further comprises generating a digital error signal from the analog error signal, and generating an input signal for the transmitter based on the baseband input signal and the digital error signal.

Abstract translation: 提供装置，系统和方法，用于使用数字误差信号来控制发射机的输出。 一种方法包括基于基带输入信号产生数字参考信号并将数字参考信号转换为模拟参考信号。 该方法还包括响应于模拟参考信号和模拟输出信号之间的差异产生模拟误差信号。 该方法还包括从模拟误差信号产生数字误差信号，并且基于基带输入信号和数字误差信号产生用于发射机的输入信号。

公开(公告)号：US07602861B2

公开(公告)日：2009-10-13

申请号：US11495500

申请日：2006-07-28

Applicant: Man Shing Wong ,  Daniel B. Schwartz

Inventor： Man Shing Wong ,  Daniel B. Schwartz

IPC: H04L25/06

CPC classification number: H04L25/06 ,  H03D7/00

Abstract: A wireless receiver includes a hardware (HW) block, a converter block and a digital signal processor (DSP). The HW block receives a wireless signal having a first DC Offset Component (DCOC), removes a portion of the first DCOC to produce a residual DCOC centered at DC, and generates parameters that estimate the residual DCOC. The converter block is coupled to the HW block and receives the residual DCOC centered at DC and converts it to a residual DCOC centered at IF. The DSP is coupled to the HW block and the converter block and receives the residual DCOC centered at IF from the converter block and the parameters from the HW block, and uses the parameters to eliminate the residual DCOC, and generate a baseband signal that is substantially free of the first DCOC and the residual DCOC.

公开(公告)号：US20080009250A1

公开(公告)日：2008-01-10

申请号：US11495500

申请日：2006-07-28

Applicant: Man Shing Wong ,  Daniel B. Schwartz

Inventor： Man Shing Wong ,  Daniel B. Schwartz

IPC: G06F3/033

CPC classification number: H04L25/06 ,  H03D7/00

Abstract: A wireless receiver includes a hardware (HW) block, a converter block and a digital signal processor (DSP). The HW block receives a wireless signal having a first DC Offset Component (DCOC), removes a portion of the first DCOC to produce a residual DCOC centered at DC, and generates parameters that estimate the residual DCOC. The converter block is coupled to the HW block and receives the residual DCOC centered at DC and converts it to a residual DCOC centered at IF. The DSP is coupled to the HW block and the converter block and receives the residual DCOC centered at IF from the converter block and the parameters from the HW block, and uses the parameters to eliminate the residual DCOC, and generate a baseband signal that is substantially free of the first DCOC and the residual DCOC.

Abstract translation: 无线接收机包括硬件（HW）块，转换器块和数字信号处理器（DSP）。 HW块接收具有第一DC偏移分量（DCOC）的无线信号，去除第一DCOC的一部分以产生以DC为中心的残余DCOC，并产生估计残余DCOC的参数。 转换器块耦合到HW块并接收以DC为中心的残余DCOC，并将其转换为以IF为中心的残留DCOC。 DSP耦合到HW块和转换器模块，并从转换器模块接收以IF为中心的残留DCOC和来自HW模块的参数，并使用参数来消除残余DCOC，并生成基本信号 没有第一个DCOC和剩余的DCOC。

公开(公告)号：US5781129A

公开(公告)日：1998-07-14

申请号：US811062

申请日：1997-03-03

Applicant: Daniel B. Schwartz ,  Ray D. Sundstrom

Inventor： Daniel B. Schwartz ,  Ray D. Sundstrom

IPC: H03M5/14 ,  H03M7/00

CPC classification number: H03M5/145

Abstract: An adaptive encoder (10) provides a fixed upper limit on the number of consecutively transmitted data bits at a particular data bit location of a data word having a common logic value. A coder circuit (44) provides prioritization for a storage comparator register (102) to determine when data in a data channel (32) should be complemented. An invert circuit (58) complements the data in the data channel (32) when an upper limit of consecutive transmitted data bits have common logic values.

Abstract translation: 自适应编码器（10）在具有公共逻辑值的数据字的特定数据位位置上提供连续发送的数据位的数量的固定上限。 编码器电路（44）为存储比较器寄存器（102）提供优先级以确定数据信道（32）中的数据何时应被补充。 当连续发送的数据位的上限具有公共逻辑值时，反相电路（58）补充数据信道（32）中的数据。

公开(公告)号：US5703506A

公开(公告)日：1997-12-30

申请号：US578726

申请日：1995-12-26

Applicant: Stephen G. Shook ,  Christopher K. Y. Chun ,  Daniel B. Schwartz

Inventor： Stephen G. Shook ,  Christopher K. Y. Chun ,  Daniel B. Schwartz

IPC: H04B10/158 ,  H04L25/06 ,  H04Q9/00 ,  G08G1/01

CPC classification number: H04B10/697 ,  H04L25/062

Abstract: A signal processing circuit (10) performs a sample and hold (16) of an input signal (14) and stores a maximum value of the input signal (18). A guardband signal (21) is developed that is less than the maximum value that is stored. The input signal is compared to the guardband signal to determine if the input signal is above or below the guardband signal. A threshold signal (25) is developed by taking a percentage of the maximum value that is stored. The input signal is compared to the threshold signal to regenerate the input waveform. If the input signal is below the guardband signal and above the threshold signal, the sample and hold circuit is reset to acquire a new maximum value of the input signal so that a new threshold can be used for regenerating the input signal.

Abstract translation: 信号处理电路（10）执行输入信号（14）的采样和保持（16）并存储输入信号（18）的最大值。 开发出小于存储的最大值的保护带信号（21）。 将输入信号与保护频带信号进行比较，以确定输入信号是否高于或低于保护频带信号。 通过获取存储的最大值的百分比来开发阈值信号（25）。 将输入信号与阈值信号进行比较，以重新生成输入波形。 如果输入信号低于保护带信号并且高于阈值信号，则采样和保持电路被复位以获取输入信号的新的最大值，使得可以使用新的阈值来再生输入信号。

公开(公告)号：US08310362B2

公开(公告)日：2012-11-13

申请号：US12532753

申请日：2007-03-26

Applicant: Norman Beamish ,  Wayne Edwards ,  Aidan Murphy ,  Hugh O Brien ,  Conor O'Keeffe ,  Patrick Pratt ,  David Redmond ,  Daniel B Schwartz ,  Keith Tilley

Inventor： Norman Beamish ,  Wayne Edwards ,  Aidan Murphy ,  Hugh O Brien ,  Conor O'Keeffe ,  Patrick Pratt ,  David Redmond ,  Daniel B Schwartz ,  Keith Tilley

IPC: G08B1/08

CPC classification number: H04B1/3805 ,  H04B7/0857 ,  H04B7/0871

Abstract: A method of processing location information on a mobile device which includes a primary receiver for receiving a primary signal; a diversity receiver for receiving a diversity signal or location information; a diversity combiner which can combine primary and diversity signals to form a combined signal; and a first processing unit for processing the combined signal; the method comprising the steps of: identifying whether the device is in a location mode or a diversity mode; if the device is in location mode, disabling the diversity combiner; passing the output from the primary receiver directly to the first processing unit; and passing location information from the diversity receiver to a location processing unit.

Abstract translation: 一种在移动设备上处理位置信息的方法，包括：用于接收主信号的主接收机; 用于接收分集信号或位置信息的分集接收机; 可以组合主要和分集信号以形成组合信号的分集组合器; 以及用于处理所述组合信号的第一处理单元; 该方法包括以下步骤：识别设备是处于位置模式还是分集模式; 如果设备处于定位模式，则禁用分集组合器; 将来自主接收机的输出直接传递到第一处理单元; 以及将位置信息从分集接收机传递到位置处理单元。