公开(公告)号：US20090141693A1

公开(公告)日：2009-06-04

申请号：US12172765

申请日：2008-07-14

申请人： Timothy Gordon Godfrey ,  Michael Andrew Fischer

发明人： Timothy Gordon Godfrey ,  Michael Andrew Fischer

IPC分类号： H04W84/12

CPC分类号： H04L29/12367 ,  H04L61/2514 ,  H04W8/26 ,  H04W80/00 ,  H04W84/12 ,  H04W88/04

摘要： A technique for enabling a secure, point-to-point wireless connection between a secondary computer (e.g., a personal digital assistant, etc.) and a primary computer (e.g., a notebook, a desktop, etc.) is disclosed. The primary computer is associated with an extended infrastructure through an access point. The present invention enables the secondary computer to communicate either with the associated primary computer or with an extended network indirectly through the access point.

摘要翻译： 公开了一种用于在辅助计算机（例如，个人数字助理等）和主计算机（例如，笔记本，桌面等）之间实现安全的点对点无线连接的技​​术。 主计算机通过接入点与扩展基础架构相关联。 本发明使辅助计算机能够通过接入点间接地与相关主计算机或扩展网络通信。

公开(公告)号：US20080310545A1

公开(公告)日：2008-12-18

申请号：US12164930

申请日：2008-06-30

申请人： Mark A. Webster ,  Michael J. Seals

发明人： Mark A. Webster ,  Michael J. Seals

IPC分类号： H04L27/04

CPC分类号： H04L27/34 ,  H04L25/0212 ,  H04L25/03006 ,  H04L27/0008 ,  H04L27/2601 ,  H04L2025/03401 ,  H04L2025/03414 ,  H04W84/12

摘要： A mixed waveform configuration for wireless communications including a first portion that is modulated according to a single-carrier modulation scheme and a second portion that is modulated according to a multi-carrier modulation scheme. The waveform is specified so that a channel impulse response (CIR) estimate obtainable from the first portion is reusable for acquisition of the second portion. The first portion includes a preamble and header and the second portion typically incorporates the payload.

摘要翻译： 一种用于无线通信的混合波形配置，包括根据单载波调制方案调制的第一部分和根据多载波调制方案调制的第二部分。 指定波形，使得可从第一部分获得的信道脉冲响应（CIR）估计可重用于采集第二部分。 第一部分包括前同步码和报头，第二部分通常包含有效载荷。

公开(公告)号：US07212512B2

公开(公告)日：2007-05-01

申请号：US10113743

申请日：2002-04-02

申请人： L. Victor Lucas ,  Carl F. Andren

发明人： L. Victor Lucas ,  Carl F. Andren

IPC分类号： H04Q7/24

CPC分类号： H03J7/065

摘要： A wireless transceiver including an oscillator, a radio, a baseband processor and MAC device that performs apiori frequency offset correction. The radio converts between RF signals and baseband signals. The baseband processor includes a frequency correction loop, an inverter and a combiner. The frequency correction loop generates a frequency offset signal based on a frequency difference between an oscillator reference frequency and frequency of a received signal. The inverter inverts the frequency offset signal and the combiner adjusts frequency of a transmit signal by the inverted frequency offset signal. The MAC processes received packets, identifies packets received from an AP, provides packets to the baseband processor for transmission, and controls the baseband processor to adjust transmit signals to a frequency of the AP. The baseband processor may include a memory or filter to store or update frequency offset values.

摘要翻译： 一种无线收发器，包括执行apiopi频偏校正的振荡器，无线电，基带处理器和MAC设备。 无线电在RF信号和基带信号之间进行转换。 基带处理器包括频率校正回路，逆变器和组合器。 频率校正循环基于振荡器参考频率和接收信号的频率之间的频率差产生频率偏移信号。 逆变器反相频率偏移信号，组合器通过反相频率偏移信号调整发射信号的频率。 MAC处理接收到的分组，识别从AP接收的分组，向基带处理器提供分组以进行传输，并控制基带处理器将发射信号调整到AP的频率。 基带处理器可以包括用于存储或更新频率偏移值的存储器或滤波器。

公开(公告)号：US07173988B2

公开(公告)日：2007-02-06

申请号：US10338362

申请日：2003-01-08

申请人： Bruce A. Cochran ,  Mark A. Webster ,  Michael J. Seals

发明人： Bruce A. Cochran ,  Mark A. Webster ,  Michael J. Seals

IPC分类号： H03D1/04 ,  H04K1/10 ,  H04B1/10 ,  H03H7/30

CPC分类号： H04L27/0014 ,  H04L2027/0046

摘要： A method of canceling gain and phase imbalance including estimating a cancellation parameter based on the signal divided by its complex conjugate, calculating a correction value for the signal using the cancellation parameter, and correcting the signal by subtracting the correction value from the signal. Estimate the cancellation parameter may include performing a stochastic gradient algorithm or a least squares estimate. A cancellation system including a conjugate conversion unit, an estimator, a combiner, a converter, and a subtractor. The estimator estimates a cancellation parameter and the combiner combines the cancellation parameter and the complex conjugate signal to provide a cancellation signal. The converter converts the cancellation signal to a correction signal, and the subtractor subtracts the correction signal from the imbalanced signal to provide a corrected signal. The combiner may be an adaptable tap of a digital signal processing circuit.

摘要翻译： 一种消除增益和相位不平衡的方法，包括基于由其复共轭除以的信号来估计消除参数，使用消除参数计算信号的校正值，以及通过从该信号中减去校正值来校正信号。 估计取消参数可以包括执行随机梯度算法或最小二乘估计。 包括共轭转换单元，估计器，组合器，转换器和减法器的抵消系统。 估计器估计消除参数，并且组合器组合消除参数和复共轭信号以提供消除信号。 转换器将消除信号转换为校正信号，减法器从不平衡信号中减去校正信号以提供校正信号。 组合器可以是数字信号处理电路的适配抽头。

公开(公告)号：US07142595B1

公开(公告)日：2006-11-28

申请号：US10120941

申请日：2002-04-10

申请人： Patrick Duvaut ,  William Keasler ,  Oliver Moreno

发明人： Patrick Duvaut ,  William Keasler ,  Oliver Moreno

IPC分类号： H03K5/159

CPC分类号： H04L25/03885 ,  H04M3/34

摘要： A communications system may be characterized by a system error variance because the error variance provides an indication of signal corruption in the system. By strategically adding a secondary sensor to the communications system, system characteristics may be altered so that the system error variance is reduced. A system and method are presented, wherein a secondary sensor is configured to receive a disturbance effect and produce a filtered slave signal as a function of the disturbance effect. The filtered slave signal is configured to alter the characteristics of the communications system and thereby reduce system error variance.

摘要翻译： 通信系统可以由系统误差变化来表征，因为误差方差提供了系统中信号损坏的指示。 通过向通信系统策略性地添加二次传感器，可以改变系统特性，从而降低系统误差方差。 提出了一种系统和方法，其中辅助传感器被配置为接收干扰效应并产生作为干扰效应的函数的滤波后的从属信号。 被滤波的从机信号被配置为改变通信系统的特性，从而减少系统误差变化。

公开(公告)号：US07106860B1

公开(公告)日：2006-09-12

申请号：US10068610

申请日：2002-02-06

申请人： Zhichao Yu ,  Willen Lao

发明人： Zhichao Yu ,  Willen Lao

IPC分类号： H04K1/00

CPC分类号： H04L9/0631 ,  H04L2209/122 ,  H04L2209/20

摘要： A system and method is presented for enciphering information using the Advanced Encryption Standard (AES) algorithm in which a subprocessor is configured to manipulate data as it is being loaded into the subprocessor memory. Thus, unlike implementations in the prior art, which require complete loading of data into a subsystem memory before data manipulation thereby creating a potential bottleneck in memory, this invention reduces the potential bottleneck in memory.

摘要翻译： 提出了一种用于使用高级加密标准（AES）算法来加密信息的系统和方法，其中子处理器被配置为在数据被加载到子处理器存储器中时操纵数据。 因此，不同于现有技术的实现，其需要在数据操作之前将数据完全加载到子系统存储器中，从而在存储器中产生潜在的瓶颈，本发明减少了存储器中的潜在瓶颈。

公开(公告)号：US07103112B2

公开(公告)日：2006-09-05

申请号：US10011580

申请日：2001-12-04

申请人： Mark A. Webster ,  Paul J. Chiuchiolo ,  Harold P. Phares

发明人： Mark A. Webster ,  Paul J. Chiuchiolo ,  Harold P. Phares

IPC分类号： H04L27/36 ,  H04B3/04 ,  H04B3/14 ,  H04B1/76

CPC分类号： H04L25/03343 ,  H04L25/03159 ,  H04L2025/03414

摘要： A transmit processor that includes a transmit frequency domain equalizer (TX FEQ) that pre-compensates packets in the frequency domain to flatten transmit filter response to improve the spectral mask and reduce packet error rate (PER). The TX FEQ taps may be selected so that the average power at the output equalize the average power applied to the input. The TX FEQ may be designed to yield 64 QAM packets with no quantization distortion at the input of the an Inverse Fast Fourier Transform (IFFT) processor. The 64 QAM constellation map points and TX FEQ gain values are selected to avoid exceeding the bit resolution of the IFFT processor. The tones may be bound together into zones to reduce implementation complexity by reducing the number of TX FEQ taps.

摘要翻译： 一种发射处理器，其包括发射频域均衡器（TX FEQ），其对频域中的分组进行预补偿，以平坦化发射滤波器响应，以改善频谱掩模并降低分组差错率（PER）。 可以选择TX FEQ抽头，使得输出端的平均功率将施加到输入端的平均功率相等。 TX FEQ可以被设计为在快速傅里叶逆变换（IFFT）处理器的输入处产生64个QAM分组而没有量化失真。 选择64个QAM星座图和TX FEQ增益值以避免超过IFFT处理器的位分辨率。 通过减少TX FEQ抽头的数量，音调可以一起绑定到区域中以降低实现复杂度。

公开(公告)号：US07069328B1

公开(公告)日：2006-06-27

申请号：US09579309

申请日：2000-05-25

申请人： Russell W. Bell

发明人： Russell W. Bell

IPC分类号： G06F15/16

CPC分类号： H04L12/2859 ,  H04L12/2801 ,  H04L12/2856 ,  H04L12/2889 ,  H04L12/4625

摘要： A system that provides a multi-drop local area network (LAN) data transfer with devices on a wide area network (WAN) via a communication network is disclosed. Two methods for managing data traffic flow between individual nodes on a LAN and a WAN are also disclosed. The point to multi-point communication system may be implemented with a digital subscriber line (DSL) transceiver and compatibly configured communication devices coupled with each node or computer on a LAN. In one embodiment, the system uses a master computer on the LAN to manage protocol stacks to control the flow of downstream and upstream data traffic between computers on the LAN and WAN data traffic on a DSL. In a second embodiment, the master computer assigns at least one asynchronous transfer mode (ATM) level virtual connection (VC) to each computer on the LAN. Each computer on the LAN identifies data traffic designated to be sent to that particular computer, removes the data from the network, and notifies the master computer that the data traffic has been received. In the second embodiment, upstream data traffic is forwarded to the master computer, which maps the appropriate ATM VC identifier before forwarding the data to the DSL transceiver for transmission. Further alternative embodiments can use a community access television (CATV) network and a wireless network to bridge the LAN and the WAN.

摘要翻译： 公开了一种通过通信网络向广域网（WAN）上的设备提供多点局域网（LAN）数据传输的系统。 还公开了用于管理LAN和WAN上的各个节点之间的数据业务流的两种方法。 可以使用数字用户线（DSL）收发器和与LAN上的每个节点或计算机耦合的兼容配置的通信设备来实现多点通信系统的点。 在一个实施例中，系统使用LAN上的主计算机来管理协议栈以控制LAN上的计算机和DSL上的WAN数据流量之间的下游和上游数据流量的流动。 在第二实施例中，主计算机向LAN上的每台计算机分配至少一个异步传输模式（ATM）级虚拟连接（VC）。 LAN上的每台计算机识别指定发送到该特定计算机的数据流量，从网络中删除数据，并通知主计算机已接收到数据流量。 在第二实施例中，将上游数据流量转发给主计算机，该主计算机在将数据转发到DSL收发器进行传输之前映射适当的ATM VC标识符。 另外的替代实施例可以使用社区接入电视（CATV）网络和无线网络来桥接LAN和WAN。

公开(公告)号：US07064363B2

公开(公告)日：2006-06-20

申请号：US10855948

申请日：2004-05-28

申请人： Rex Everett Lowther ,  William R. Young

发明人： Rex Everett Lowther ,  William R. Young

IPC分类号： H01L29/80 ,  H01L31/112

CPC分类号： H01L28/10 ,  H01F17/0013 ,  H01F27/367 ,  H01L23/5223 ,  H01L23/5225 ,  H01L23/5227 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/00

摘要： The present invention relates to integrated circuits having symmetric inducting devices with a ground shield. In one embodiment, a symmetric inducting device for an integrated circuit comprises a substrate, a main metal layer and a shield. The substrate has a working surface. The main metal layer has at least one pair of current path regions. Each of the current path region pairs is formed in generally a regular polygonal shape that is generally symmetric about a plane of symmetry that is perpendicular to the working surface of the substrate. The shield is patterned into segments that are generally symmetric about the plane of symmetry. Medial portions of at least some segments of the shield are formed generally perpendicular to the plane of symmetry as the medial portions cross the plane of symmetry.

公开(公告)号：US20060114976A1

公开(公告)日：2006-06-01

申请号：US11197524

申请日：2005-08-05

申请人： Ehud Langberg ,  Lujing Cai ,  Avi Rapaport

发明人： Ehud Langberg ,  Lujing Cai ,  Avi Rapaport

IPC分类号： H04L5/16 ,  H04K1/10

CPC分类号： H04B3/23

摘要： An economic low-complexity system and method for echo cancellation are disclosed. The system and method are particularly suited for multi-carrier VDSL using the U0 band. The techniques taught herein may be implemented in VDSL and VDSL2 systems and used to receive signals in three bands (e.g., U0, U1 and U2) simultaneously.

摘要翻译： 公开了用于回波消除的经济低复杂度系统和方法。 该系统和方法特别适用于使用U0频段的多载波VDSL。 本文教导的技术可以在VDSL和VDSL2系统中实现，并且用于同时在三个频带（例如，U0，U1和U2）中接收信号。