公开(公告)号：US20060098928A1

公开(公告)日：2006-05-11

申请号：US11265931

申请日：2005-11-03

申请人： Thomas Koch ,  Robert Pafchek ,  Mark Webster

发明人： Thomas Koch ,  Robert Pafchek ,  Mark Webster

IPC分类号： G02B6/10

CPC分类号： G02B6/132 ,  G02B2006/121 ,  G02B2006/12173 ,  H01S3/063 ,  H01S3/1603 ,  H01S3/1628

摘要： Disclosed is a method of fabricating an optical waveguide device including the steps of forming a mask over a waveguide core material layer so as to leave a portion of the layer exposed, and exposing the structure to an oxidizing environment to form an oxide layer on the waveguide core material layer at least in the exposed portion thereby defining the lateral dimension of the waveguide core. The resulting waveguide core has extremely smooth surfaces for low optical losses.

公开(公告)号：US20050281241A1

公开(公告)日：2005-12-22

申请号：US11159812

申请日：2005-06-22

申请人： Mark Webster ,  Michael Seals

发明人： Mark Webster ,  Michael Seals

IPC分类号： H04B7/06 ,  H04J1/00 ,  H04L27/26

CPC分类号： H04L27/2613 ,  H04B7/02 ,  H04B7/0697 ,  H04W24/00

摘要： Embodiments of legacy compatible spatial multiplexing systems and methods are disclosed. One method embodiment, among others, comprises receiving long training symbols and cyclic shifted long training symbols corresponding to legacy preamble portions of packets corresponding to first and second transmit signals, receiving long training symbols and inverted cyclic shifted long training symbols corresponding to spatial multiplexing portions of packets corresponding to first and second transmit signals, and combining the symbols corresponding to the first and second transmit antennas to estimate the respective channels.

摘要翻译： 公开了传统兼容空间复用系统和方法的实施例。 一个方法实施例包括接收对应于与第一和第二发射信号相对应的分组的传统前导码部分的长训练符号和循环移位的长训练符号，接收对应于空间复用部分的长训练符号和反向循环移位长训练符号 分组对应于第一和第二发射信号，并组合对应于第一和第二发射天线的符号以估计相应的信道。

公开(公告)号：US20050180314A1

公开(公告)日：2005-08-18

申请号：US11033524

申请日：2005-01-12

申请人： Mark Webster ,  Daniel Shearer

发明人： Mark Webster ,  Daniel Shearer

IPC分类号： H04B7/02 ,  H04J11/00 ,  H04L5/02

CPC分类号： H04L5/023 ,  H04B7/02

摘要： A method and system provides a way to achieve very high data rate expanded bandwidth (wide band) WLAN operations reusing existing single channel radio designs. The system provides a dual-channel form of operation for greater flexibility and performance across multiple platforms. Further, the system provides adaptive anti-aliasing techniques for eliminating aliasing due to adjacent channel waveform effects. These techniques mesh with existing systems cleanly.

摘要翻译： 一种方法和系统提供了一种实现非常高的数据速率扩展带宽（宽带）WLAN操作的方式，重用现有的单通道无线电设计。 该系统提供了双通道的操作形式，可在多个平台上实现更大的灵活性和性能。 此外，该系统提供用于消除由于相邻信道波形效应引起的混叠的自适应抗混叠技术。 这些技术干净地与现有系统联网。

公开(公告)号：US20050117670A1

公开(公告)日：2005-06-02

申请号：US10927487

申请日：2004-08-27

申请人： Mark Webster ,  Albert Garrett ,  Steven Halford ,  Michael Seals

发明人： Mark Webster ,  Albert Garrett ,  Steven Halford ,  Michael Seals

IPC分类号： H04J11/00 ,  H04L27/26

CPC分类号： H04L27/2602

摘要： A 10 MHz channelized orthogonal frequency division multiplexing (OFDM) transmitter is provided that communicates using a modified OFDM packet structure with a half-rate oscillator having standard accuracy. The transmitter has an inverse fast fourier transform (IFFT) data processor that appends an outer pair of data subcarriers on either end of an OFDM subcarrier profile. An IFFT long sync processor appends an outer pair of binary phase shift key (BPSK) subcarriers on either end of an OFDM long sync subcarrier profile. By copying or appending the information of the data subcarriers closest to zero Hz. to more robust locations, 10 MHz channelized OFDM can be achieved with half-rate clocks and 20 PPM oscillators.

摘要翻译： 提供了一种使用修正的OFDM分组结构与具有标准精度的半速率振荡器进行通信的10MHz信道化正交频分复用（OFDM）发射机。 发射机具有在OFDM子载波简档的任一端附加一对外部数据子载波对的快速傅立叶变换（IFFT）数据处理器。 IFFT长同步处理器在OFDM长同步子载波简档的任一端附加一对外部二进制相移键（BPSK）副载波。 通过复制或附加最接近零Hz的数据子载波的信息。 到更健壮的位置，可以使用半速率时钟和20 PPM振荡器来实现10 MHz信道化OFDM。

公开(公告)号：US20050075815A1

公开(公告)日：2005-04-07

申请号：US10666410

申请日：2003-09-19

申请人： Mark Webster ,  Michael Seals ,  Bruce Cochran

发明人： Mark Webster ,  Michael Seals ,  Bruce Cochran

IPC分类号： H04B17/00 ,  G06F19/00

CPC分类号： H04L27/364 ,  H03C3/406 ,  H03D3/008 ,  H03D3/009 ,  H04B17/14

摘要： An on-signal calibration system I and Q signals of a transmitter to remove distortions in the RF output signal. The transmitter generates I and Q values and converts, modulates and combines the I and Q values into the RF output signal for transmission. The calibration system includes a detector, a sampler, a selector, an imbalance estimator, and an IQ corrector. The detector senses the RF output signal and provides a detection signal indicative thereof. The sampler samples the detection signal and provides digital samples. The selector selects from among the digital samples that correspond to predetermined ranges of the I and Q values, or otherwise predetermined selection boxes at predetermined phases. The imbalance estimator determines at least one imbalance estimate based on selected digital samples. The IQ corrector corrects the I and Q values using at least one imbalance estimate.

摘要翻译： 发射机的信号校准系统I和Q信号，以消除RF输出信号中的失真。 发射机产生I和Q值，并将I和Q值转换，调制和组合成RF输出信号进行传输。 校准系统包括检测器，采样器，选择器，不平衡估计器和IQ校正器。 检测器感测RF输出信号并提供指示其的检测信号。 采样器对检测信号进行采样，并提供数字采样。 选择器从数字样本中选择对应于I和Q值的预定范围，或者在预定阶段选择预定的选择框。 不平衡估计器基于所选择的数字样本确定至少一个不平衡估计。 IQ校正器使用至少一个不平衡估计来校正I和Q值。

公开(公告)号：US20050053128A1

公开(公告)日：2005-03-10

申请号：US10886025

申请日：2004-07-08

申请人： Daniel Shearer ,  Alex Yeh ,  Mark Webster ,  Steven Halford

发明人： Daniel Shearer ,  Alex Yeh ,  Mark Webster ,  Steven Halford

IPC分类号： H03K5/159 ,  H04L25/02 ,  H04L25/03

CPC分类号： H04L25/03159 ,  H04L25/022 ,  H04L2025/03414 ,  H04L2025/03522

摘要： An adaptive frequency equalization system providing an equalizer that has programmable taps that adjusts magnitude and phase of symbol information of a received signal and that provides equalized symbol information. The system includes a hard decision circuit that selects ideal symbol values using the equalized symbol information. A frequency response circuit determines frequency response update values using the ideal symbol values and the received signal. An adjust circuit updates stored frequency response information using the frequency response update values, and also updates the programmable taps of the equalizer using the stored frequency response information.

摘要翻译： 一种自适应频率均衡系统，其提供均衡器，该均衡器具有调节接收信号的符号信息的幅度和相位并且提供均衡的符号信息的可编程抽头。 该系统包括使用均衡符号信息来选择理想符号值的硬判决电路。 频率响应电路使用理想符号值和接收信号来确定频率响应更新值。 调整电路使用频率响应更新值更新存储的频率响应信息，并且还使用存储的频率响应信息来更新均衡器的可编程抽头。

公开(公告)号：US09598242B2

公开(公告)日：2017-03-21

申请号：US14606312

申请日：2015-01-27

申请人： Mark Webster ,  David Konopacki ,  Michael Reilly

发明人： Mark Webster ,  David Konopacki ,  Michael Reilly

IPC分类号： B65G35/06 ,  B65G37/02

CPC分类号： B65G37/02 ,  B65G35/06

摘要： A moving floor system that includes a moving work surface to move work products from an upstream end to a downstream end. The moving work surface is formed from a plurality of individual carts joined to each other. The stack of carts is moved along upper support rails located at an upper level. When each individual cart reaches the downstream end, a downstream lift conveyor moves the individual cart from the upper level to a lower level. When at the lower level, each individual cart is returned from the downstream end to the upstream end. When each individual cart reaches the upstream end, an upstream lift conveyor returns the individual carts from the lower level to the upper level. An upper drive mechanism provides the motive force to move the stack of carts along the upper level at the working speed.

公开(公告)号：US20120279806A1

公开(公告)日：2012-11-08

申请号：US13464373

申请日：2012-05-04

申请人： Mark Webster

发明人： Mark Webster

IPC分类号： B66B5/02

CPC分类号： B66B1/06

摘要： A method and system for controlling the operation of a drive motor for a vertical reciprocating conveyor. The method initially activates a drive motor to move a carriage from a resting position. After initial start-up period, the method sets a threshold current value as the present current value being drawn by the drive motor. The method compares subsequent present current value measurements to the threshold current value and determines whether the present current value exceeds or falls below the threshold current value by more than an operating limit. If the present current value falls within the operating limits, the threshold current value is updated to the present current value on a periodic basis. In this manner, the method continuously updates the threshold current value to compensate for an increase in the weight being lifted by the vertical reciprocating conveyor.

摘要翻译： 一种用于控制用于垂直往复式输送机的驱动马达的操作的方法和系统。 该方法最初激活驱动马达以使托架从静止位置移动。 在初始启动时间之后，该方法将阈值电流值设置为由驱动电动机画出的当前值。 该方法将随后的当前值测量值与阈值电流值进行比较，并确定当前电流值是否超过或低于阈值电流值超过操作极限。 如果当前电流值落在运行极限内，则周期性地将阈值电流值更新为当前电流值。 以这种方式，该方法不断更新阈值电流值以补偿由垂直往复式输送机提升的重量的增加。

公开(公告)号：US08031991B2

公开(公告)日：2011-10-04

申请号：US12454963

申请日：2009-05-27

申请人： Mark Webster ,  Vipulkumar Patel

发明人： Mark Webster ,  Vipulkumar Patel

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： G02B6/1228

摘要： An optical coupler is formed of a low index material and exhibits a mode field diameter suitable to provide efficient coupling between a free space optical signal (of large mode field diameter) and a single mode high index waveguide formed on an optical substrate. One embodiment comprises an antiresonant reflecting optical waveguide (ARROW) structure in conjunction with an embedded (high index) nanotaper coupling waveguide. Another embodiment utilizes a low index waveguide structure disposed in an overlapped arrangement with a high index nanotaper coupling waveguide. The low index waveguide itself includes a tapered region that overlies the nanotaper coupling waveguide to facilitate the transfer of the optical energy from the low index waveguide into an associated single mode high index waveguide. Methods of forming these devices using CMOS processes are also disclosed.

摘要翻译： 光耦合器由低折射率材料形成，并且具有适于提供在大尺寸场直径的自由空间光信号和形成在光学基片上的单模高折射率波导之间的有效耦合的模场直径。 一个实施例包括结合嵌入式（高折射率）纳米锥耦合波导的反谐振反射光波导（ARROW）结构。 另一实施例利用与高折射率纳米锥耦合波导重叠布置设置的低折射率波导结构。 低折射率波导本身包括覆盖在纳米锥耦合波导上的锥形区域，以便将光能量从低折射率波导传输到相关联的单模高折射率波导中。 还公开了使用CMOS工艺形成这些器件的方法。

公开(公告)号：US07668258B2

公开(公告)日：2010-02-23

申请号：US11411619

申请日：2006-04-26

申请人： Mark Webster ,  Deniz Rende ,  Jim Petranovich

发明人： Mark Webster ,  Deniz Rende ,  Jim Petranovich

IPC分类号： H03C3/00

CPC分类号： H04B7/0697 ,  H04B7/0671 ,  H04B7/0691

摘要： Methods and systems for transmitter diversity expansion are provided. The methods and systems include steps and modules for applying a number of data streams (K) to a larger number of antennas (N). This is performed by applying each of the data streams to a single base antenna, such that K data streams are applied to K base antennas, and by shifting and combining the K data streams to produce N-K data streams to apply to N-K extension antennas.

摘要翻译： 提供了发射机分集扩展的方法和系统。 所述方法和系统包括用于将数个数据流（K）应用于更大数量的天线（N）的步骤和模块。 这通过将每个数据流应用于单个基本天线来执行，使得K个数据流被应用于K个基本天线，并且通过移位和组合K个数据流以产生应用于N-K个扩展天线的N-K个数据流。