公开(公告)号：US20140376540A1

公开(公告)日：2014-12-25

申请号：US13925023

申请日：2013-06-24

申请人： Jianqiang Zeng ,  Steven M. Bosze ,  Raja V. Tamma ,  Kevin B. Traylor ,  Khurram Waheed

发明人： Jianqiang Zeng ,  Steven M. Bosze ,  Raja V. Tamma ,  Kevin B. Traylor ,  Khurram Waheed

IPC分类号： H04W56/00

CPC分类号： H04W56/0005

摘要： Methods and systems are disclosed for frequency-domain symbol and frame synchronization for multi-carrier communication systems. Received signals are sampled and converted into frequency components associated with subcarriers within the multi-carrier communication signals. Symbol synchronization is performed in the frequency domain by performing correlation(s) between frequency components of the received signal and frequency-domain synchronization symbol(s). After symbol synchronization, frame synchronization correlation is also performed in the frequency domain between frequency components of the received signal and frequency-domain synchronization symbol(s). The disclosed embodiments are particularly useful for symbol and frame synchronization in multi-carrier received signals for power line communication (PLC) systems and/or other harsh noisy communication environments.

摘要翻译： 公开了用于多载波通信系统的频域符号和帧同步的方法和系统。 接收的信号被采样并转换成与多载波通信信号内的子载波相关联的频率分量。 通过执行接收信号的频率分量与频域同步符号之间的相关性，在频域中执行符号同步。 在符号同步之后，也在接收信号的频率分量与频域同步符号之间的频域中执行帧同步相关。 所公开的实施例对于用于电力线通信（PLC）系统和/或其他恶劣的噪声通信环境的多载波接收信号中的符号和帧同步特别有用。

公开(公告)号：US08271569B2

公开(公告)日：2012-09-18

申请号：US12140890

申请日：2008-06-17

申请人： Jayakrishnan C. Mundarath ,  Leo G. Dehner ,  Kevin B. Traylor

发明人： Jayakrishnan C. Mundarath ,  Leo G. Dehner ,  Kevin B. Traylor

IPC分类号： G06F15/00

CPC分类号： G06F17/142

摘要： A technique for performing a discrete Fourier transform (DFT) includes storing, in a single-port memory, multiple signal points. A first group of consecutive ones of the multiple signal points are fetched (from a first line of the single-port memory) to a first input register associated with a processor that includes multiple arithmetic units (AUs) that are each configured to perform multiply accumulate (MAC) operations. A second group of consecutive ones of the multiple signal points are then fetched (from a second line of the single-port memory) to a second input register associated with the processor. Selected pairs of the multiple signal points are then loaded (one from each of the first and second input registers for each pair) into the multiple arithmetic units during an initial butterfly stage. Radix-2 butterfly operations are then performed on the selected pairs of the multiple signal points (using the multiple AUs) to provide respective output elements.

摘要翻译： 用于执行离散傅里叶变换（DFT）的技术包括在单端口存储器中存储多个信号点。 将多个信号点中的连续的多个信号点中的第一组（从单端口存储器的第一行）提取到与包括多个运算单元（AU）的处理器相关联的第一输入寄存器，每个运算单元被配置为执行乘法累积 （MAC）操作。 然后将多个信号点中的第二组连续的信号点从单端口存储器的第二行提取到与处理器相关联的第二输入寄存器。 然后，在初始蝴蝶阶段期间，将多个信号点的所选择的对加载（每对中的每个第一和第二输入寄存器中的一个）分配到多个运算单元中。 然后对所选择的多个信号点对（使用多个AU）执行基2蝶形运算，以提供相应的输出元件。

公开(公告)号：US20110280208A1

公开(公告)日：2011-11-17

申请号：US13190384

申请日：2011-07-25

申请人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

发明人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

IPC分类号： H04W72/04

CPC分类号： H04B1/16 ,  H04B17/382 ,  H04W52/0225 ,  Y02D70/00 ,  Y02D70/1262

摘要： A method and system for wireless communications between base and mobile stations use reference signals transmitted from base stations prior transmission of data signals. The reference signals are used to determine propagation characteristics of communication channels between the base and mobile stations and optimize, in real time, parameters of receivers of the mobile stations for processing the following data signals. Applications of the invention include wireless communication systems compliant with OFDMA, 3GPP LTE, RFN-OFDMA, OFDM, TDMA, and the like communication protocols.

摘要翻译： 用于基站和移动站之间的无线通信的方法和系统在数据信号的传输之前使用从基站发送的参考信号。 参考信号用于确定基站和移动台之间的通信信道的传播特性，并实时优化用于处理以下数据信号的移动站接收机的参数。 本发明的应用包括符合OFDMA，3GPP LTE，RFN-OFDMA，OFDM，TDMA等的通信协议的无线通信系统。

公开(公告)号：US07469020B2

公开(公告)日：2008-12-23

申请号：US11114366

申请日：2005-04-26

申请人： James Wesley McCoy ,  Kevin B. Traylor

发明人： James Wesley McCoy ,  Kevin B. Traylor

IPC分类号： H04K1/02

CPC分类号： H04L27/2071

摘要： Systems, methods, and apparatus for reducing dynamic range requirements of a power amplifier in a wireless device are provided. An exemplary method may include modulating a symbol stream to generate a modulated waveform. The exemplary method may further include generating at least one pulse having a peak aligned with an anticipated position of a peak or a null corresponding to the modulated waveform, where the anticipated position of the a peak or the null corresponding to modulated waveform may be determined by detecting a transition in a phase or an amplitude of the modulated waveform.

摘要翻译： 提供了用于减少无线设备中的功率放大器的动态范围要求的系统，方法和装置。 示例性方法可以包括调制符号流以生成调制波形。 该示例性方法可以进一步包括产生具有与对应于调制波形的峰值或空值的预期位置对准的峰值的至少一个脉冲，其中与调制波形相对应的峰值或空值的预期位置可以由 检测调制波形的相位或振幅的转变。

公开(公告)号：US20080232308A1

公开(公告)日：2008-09-25

申请号：US11688125

申请日：2007-03-19

申请人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

发明人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

IPC分类号： H04B17/00

CPC分类号： H04B1/16 ,  H04B17/382 ,  H04W52/0225 ,  Y02D70/00 ,  Y02D70/1262

摘要： A method and system for wireless communications between base and mobile stations use reference signals transmitted from base stations prior transmission of data signals. The reference signals are used to determine propagation characteristics of communication channels between the base and mobile stations and optimize, in real time, parameters of receivers of the mobile stations for processing the following data signals. Applications of the invention include wireless communication systems compliant with OFDMA, 3GPP LTE, RFN-OFDMA, OFDM, TDMA, and the like communication protocols.

摘要翻译： 用于基站和移动站之间的无线通信的方法和系统在数据信号的传输之前使用从基站发送的参考信号。 参考信号用于确定基站和移动台之间的通信信道的传播特性，并实时优化用于处理以下数据信号的移动站接收机的参数。 本发明的应用包括符合OFDMA，3GPP LTE，RFN-OFDMA，OFDM，TDMA等的通信协议的无线通信系统。

公开(公告)号：US20070300044A1

公开(公告)日：2007-12-27

申请号：US11426633

申请日：2006-06-27

申请人： William C. Moyer ,  Kevin B. Traylor

发明人： William C. Moyer ,  Kevin B. Traylor

IPC分类号： G06F15/00

CPC分类号： G06F9/3877 ,  G06F9/3001 ,  G06F9/3824

摘要： A coprocessor (14) may be used to perform one or more specialized operations that can be off-loaded from a primary or general purpose processor (12). It is important to allow efficient communication and interfacing between the processor (12) and the coprocessor (14). In one embodiment, a coprocessor (14) generates and provides instructions (200, 220) to an instruction pipe (20) in the processor (12). Because the coprocessor (14) generated instructions are part of the standard instruction set of the processor (12), cache (70) coherency is easy to maintain. Also, circuitry (102) in coprocessor (14) may perform an operation on data while circuitry (106) in coprocessor (14) is concurrently generating processor instructions (200, 220).

公开(公告)号：US07986933B2

公开(公告)日：2011-07-26

申请号：US11688125

申请日：2007-03-19

申请人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

发明人： Leo G. Dehner ,  James W. McCoy ,  Kevin B. Traylor

IPC分类号： H04B1/16

CPC分类号： H04B1/16 ,  H04B17/382 ,  H04W52/0225 ,  Y02D70/00 ,  Y02D70/1262

摘要： A method and system for wireless communications between base and mobile stations use reference signals transmitted from base stations prior transmission of data signals. The reference signals are used to determine propagation characteristics of communication channels between the base and mobile stations and optimize, in real time, parameters of receivers of the mobile stations for processing the following data signals. Applications of the invention include wireless communication systems compliant with OFDMA, 3GPP LTE, RFN-OFDMA, OFDM, TDMA, and the like communication protocols.

摘要翻译： 用于基站和移动站之间的无线通信的方法和系统在数据信号的传输之前使用从基站发送的参考信号。 参考信号用于确定基站和移动台之间的通信信道的传播特性，并实时优化用于处理以下数据信号的移动站接收机的参数。 本发明的应用包括符合OFDMA，3GPP LTE，RFN-OFDMA，OFDM，TDMA等的通信协议的无线通信系统。

公开(公告)号：US07805590B2

公开(公告)日：2010-09-28

申请号：US11426633

申请日：2006-06-27

申请人： William C. Moyer ,  Kevin B. Traylor

发明人： William C. Moyer ,  Kevin B. Traylor

IPC分类号： G06F9/312

CPC分类号： G06F9/3877 ,  G06F9/3001 ,  G06F9/3824

摘要： A coprocessor (14) may be used to perform one or more specialized operations that can be off-loaded from a primary or general purpose processor (12). It is important to allow efficient communication and interfacing between the processor (12) and the coprocessor (14). In one embodiment, a coprocessor (14) generates and provides instructions (200, 220) to an instruction pipe (20) in the processor (12). Because the coprocessor (14) generated instructions are part of the standard instruction set of the processor (12), cache (70) coherency is easy to maintain. Also, circuitry (102) in coprocessor (14) may perform an operation on data while circuitry (106) in coprocessor (14) is concurrently generating processor instructions (200, 220).

摘要翻译： 协处理器（14）可用于执行可以从主要或通用处理器（12）卸载的一个或多个专门操作。 允许处理器（12）和协处理器（14）之间的高效通信和接口是重要的。 在一个实施例中，协处理器（14）产生并向处理器（12）中的指令管道（20）提供指令（200,220）。 由于协处理器（14）产生的指令是处理器（12）的标准指令集的一部分，所以高速缓存（70）的一致性容易维护。 而且，协处理器（14）中的电路（102）可以对数据执行操作，而协处理器（14）中的电路（106）同时产生处理器指令（200,220）。

公开(公告)号：US20090313530A1

公开(公告)日：2009-12-17

申请号：US12157512

申请日：2008-06-11

申请人： Christopher J. Becker ,  Kevin B. Traylor

发明人： Christopher J. Becker ,  Kevin B. Traylor

IPC分类号： H03M13/25 ,  H03M13/23 ,  H03M13/41 ,  G06F11/08

CPC分类号： H03M13/4115 ,  H03M13/09 ,  H03M13/27 ,  H03M13/41 ,  H03M13/6362 ,  H04L1/0054

摘要： Methods and corresponding systems in a Viterbi decoder include computing a maximum likelihood (ML) path in a Viterbi trellis in response to executing a first Viterbi algorithm. Thereafter, one or more merge points are selected on the ML path in a second Viterbi algorithm, wherein the merge points each have a path metric difference, which is a difference between an ML path metric at the merge point and a non-surviving path metric at the merge point. Merge points are selected based upon relative path metric differences associated with nodes on the ML path. Next, alternate paths in the Viterbi trellis are computed based on the ML path with alternate paths substituted at corresponding merge points. A passing decoded bit sequence is output in response to passing an error check, wherein the passing decoded bit sequence is associated with one of the one or more alternate paths.

摘要翻译： 维特比解码器中的方法和对应系统包括响应于执行第一维特比算法计算维特比网格中的最大似然（ML）路径。 此后，在第二维特比算法中在ML路径上选择一个或多个合并点，其中合并点各自具有路径度量差异，其是合并点处的ML路径度量与不存在路径度量 在合并点。 基于与ML路径上的节点相关联的相对路径度量差选择合并点。 接下来，维特比网格中的替代路径是基于ML路径计算的，其中替代路径在相应的合并点处被替换。 经过解码的比特序列响应于通过错误检查被输出，其中通过解码的比特序列与一个或多个替代路径中的一个相关联。

公开(公告)号：US20090179697A1

公开(公告)日：2009-07-16

申请号：US12013070

申请日：2008-01-11

申请人： Thomas J. Zuiss ,  Kevin B. Traylor

发明人： Thomas J. Zuiss ,  Kevin B. Traylor

IPC分类号： H03F3/38

CPC分类号： H03F3/68 ,  H03F3/185 ,  H03F3/2171

摘要： An amplifier comprises first, second, and third modulators. The first modulator includes an input for receiving a first input signal, and an output for providing a first modulated output signal corresponding to the first input signal. The second modulator includes an input for receiving a second input signal, and an output for providing a second modulated output signal corresponding to the second input signal. The third modulator has an input for receiving a third input signal, and an output for providing a third modulated output signal corresponding to the third input signal and for providing a virtual ground. A first amplifier circuit is coupled to the outputs of the first and third modulators for driving a first load. A second amplifier circuit is coupled to the outputs of the second and third modulators for driving a second load.

摘要翻译： 放大器包括第一，第二和第三调制器。 第一调制器包括用于接收第一输入信号的输入端和用于提供对应于第一输入信号的第一调制输出信号的输出端。 第二调制器包括用于接收第二输入信号的输入端和用于提供对应于第二输入信号的第二调制输出信号的输出端。 第三调制器具有用于接收第三输入信号的输入端和用于提供对应于第三输入信号的第三调制输出信号并用于提供虚拟接地的输出端。 第一放大器电路耦合到第一和第三调制器的输出端，用于驱动第一负载。 第二放大器电路耦合到第二和第三调制器的输出端，用于驱动第二负载。