公开(公告)号：US07149238B2

公开(公告)日：2006-12-12

申请号：US11409437

申请日：2006-04-21

Applicant: Brian G. Agee ,  Matthew Bromberg ,  Derek Gerlach ,  David Gibbons ,  James Timothy Golden ,  Minnic Ho ,  Elliott Hoole ,  Mary Jesse ,  Robert Lee Maxwell ,  Robert G. Mechaley, Jr. ,  Robert Ray Naish ,  David J. Nix ,  David James Ryan ,  David Stephenson

Inventor： Brian G. Agee ,  Matthew Bromberg ,  Derek Gerlach ,  David Gibbons ,  James Timothy Golden ,  Minnic Ho ,  Elliott Hoole ,  Mary Jesse ,  Robert Lee Maxwell ,  Robert G. Mechaley, Jr. ,  Robert Ray Naish ,  David J. Nix ,  David James Ryan ,  David Stephenson

IPC: H04B1/69

CPC classification number: H04B1/69 ,  H04B1/692 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/04 ,  H04B2201/70702 ,  H04L5/0021 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/026 ,  H04L25/0228 ,  H04L25/03019 ,  H04L27/186 ,  H04L27/3416 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04W16/14 ,  H04W88/08

Abstract: A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms. In a specific embodiment the spectral and spatial components of the adaptive weights are calculated in a unified operation based on the mathematical analogy between the spectral and spatial descriptions of the airlink.

公开(公告)号：US20060193373A1

公开(公告)日：2006-08-31

申请号：US11409437

申请日：2006-04-21

Applicant: Brian Agee ,  Matthew Bromberg ,  Derek Gerlach ,  David Gibbons ,  James Golden ,  Minnie Ho ,  Elliott Hoole ,  Mary Jesse ,  Robert Maxwell ,  Robert Mechaley ,  Robert Naish ,  David Nix ,  David Ryan ,  David Stephenson

Inventor： Brian Agee ,  Matthew Bromberg ,  Derek Gerlach ,  David Gibbons ,  James Golden ,  Minnie Ho ,  Elliott Hoole ,  Mary Jesse ,  Robert Maxwell ,  Robert Mechaley ,  Robert Naish ,  David Nix ,  David Ryan ,  David Stephenson

IPC: H04B1/707 ,  H04K1/10

CPC classification number: H04B1/69 ,  H04B1/692 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/04 ,  H04B2201/70702 ,  H04L5/0021 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/026 ,  H04L25/0228 ,  H04L25/03019 ,  H04L27/186 ,  H04L27/3416 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04W16/14 ,  H04W88/08

Abstract: A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms. In a specific embodiment the spectral and spatial components of the adaptive weights are calculated in a unified operation based on the mathematical analogy between the spectral and spatial descriptions of the airlink.

Abstract translation: 离散多媒体叠层载波扩频通信方法是基于频域扩展，包括基带信号乘以叠加的或叠加的复数正弦波载波的集合。 在优选实施例中，扩展涉及激励大的快速傅立叶变换（FFT）的信息仓。 这为中等输出FFT大小节省了大量的计算复杂度。 点对多点和多点到多点（无节点）网络拓扑是可能的。 通过利用各种光源的光谱多样性，可以包括一个代码归零方法用于干扰消除和增强的信号分离。 基本方法可以扩展为包括用于干扰消除的多元天线阵列归零方法和使用空间分离的增强信号分离。 这种方法允许适应或可以适应于无线电环境的指导和逆向传输系统。 这样的系统与带宽按需和高阶调制格式兼容，并且使用高级适配算法。 在具体实施例中，基于空中链路的频谱和空间描述之间的数学类比，以统一的操作计算自适应权重的频谱和空间分量。

公开(公告)号：US06621851B1

公开(公告)日：2003-09-16

申请号：US09723337

申请日：2000-11-28

Applicant: Brian G. Agee ,  Matthew Bromberg ,  Derek Gerlach ,  David Gibbons ,  James Timothy Golden ,  Minnie Ho ,  Elliott Hoole ,  Mary Jesse ,  Robert Lee Maxwell ,  Robert G. Mechaley, Jr. ,  Robert Ray Naish ,  David J. Nix ,  David James Ryan ,  David Stephenson

Inventor： Brian G. Agee ,  Matthew Bromberg ,  Derek Gerlach ,  David Gibbons ,  James Timothy Golden ,  Minnie Ho ,  Elliott Hoole ,  Mary Jesse ,  Robert Lee Maxwell ,  Robert G. Mechaley, Jr. ,  Robert Ray Naish ,  David J. Nix ,  David James Ryan ,  David Stephenson

IPC: H04B169

CPC classification number: H04B1/69 ,  H04B1/692 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/04 ,  H04B2201/70702 ,  H04L5/0021 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/026 ,  H04L25/0228 ,  H04L25/03019 ,  H04L27/186 ,  H04L27/3416 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04W16/14 ,  H04W88/08

Abstract: A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms. In a specific embodiment the spectral and spatial components of the adaptive weights are calculated in a unified operation based on the mathematical analogy between the spectral and spatial descriptions of the airlink.

Abstract translation: 离散多媒体叠层载波扩频通信方法是基于频域扩展，包括基带信号乘以叠加的或叠加的复数正弦波载波的集合。 在优选实施例中，扩展涉及激励大的快速傅立叶变换（FFT）的信息仓。 这为中等输出FFT大小节省了大量的计算复杂度。 点对多点和多点到多点（无节点）网络拓扑是可能的。 通过利用各种光源的光谱多样性，可以包括一个代码归零方法用于干扰消除和增强的信号分离。 基本方法可以扩展为包括用于干扰消除的多元天线阵列归零方法和使用空间分离的增强信号分离。 这种方法允许适应或可以适应于无线电环境的指导和逆向传输系统。 这样的系统与带宽按需和高阶调制格式兼容，并且使用高级适配算法。 在具体实施例中，基于空中链路的频谱和空间描述之间的数学类比，以统一的操作来计算自适应权重的频谱和空间分量。

公开(公告)号：US6072581A

公开(公告)日：2000-06-06

申请号：US183057

申请日：1998-10-30

Applicant: David Stephenson ,  Xavier Colonna de Lega

Inventor： David Stephenson ,  Xavier Colonna de Lega

IPC: G01B9/02 ,  G01B11/24 ,  G01B11/30 ,  G02B5/18

CPC classification number: G01B11/2441 ,  G01B11/306

Abstract: The optical assembly of a GDI instrument is configured to deviate or steer stray beams away from the pupil of the instrument's imaging device and/or to suppress stray beams. Stray beam deviation is optimized by selecting particular wedge and/or tilt configurations that achieve the desired stray beam deviation while avoiding or at least minimizing phase offset at the optimum metrology plane. Stray beam suppression can be achieved by providing the diffractive groove profile of the instrument's optical assembly with smooth edges. The resultant profile facilitates effective diffraction order management as well as a reduction in back reflection. The invention is particularly well-suited for use with a GDI instrument in which the optical assembly comprises first and second diffraction gratings. In this case, any average phase offset that remains after setting wedge and/or tilt can be eliminated by inserting a suitable compensating plate between the first and second diffraction gratings or between the second diffraction grating and the object.

Abstract translation: GDI仪器的光学组件被配置为偏离或引导杂散光束远离仪器的成像装置的光瞳和/或抑制杂散光束。 通过选择实现期望的杂散光束偏移的特定楔形和/或倾斜配置来优化杂散光束偏移，同时避免或至少最小化最佳计量平面处的相位偏移。 可以通过提供具有光滑边缘的仪器光学组件的衍射凹槽轮廓来实现杂散光束抑制。 所得到的轮廓有助于有效的衍射顺序管理以及减少背反射。 本发明特别适用于GDI仪器，其中光学组件包括第一和第二衍射光栅。 在这种情况下，通过在第一和第二衍射光栅之间或第二衍射光栅与物体之间插入合适的补偿板，可以消除在设置楔形和/或倾斜之后保留的任何平均相位偏移。

公开(公告)号：US5681499A

公开(公告)日：1997-10-28

申请号：US548764

申请日：1995-10-26

Applicant: Paul M. Benson ,  Duane L. DeBastiani ,  Quentin K. Robinson ,  David Stephenson ,  Phillipe Dumas ,  Eric Hanse

Inventor： Paul M. Benson ,  Duane L. DeBastiani ,  Quentin K. Robinson ,  David Stephenson ,  Phillipe Dumas ,  Eric Hanse

IPC: B22D41/18 ,  B22D41/54 ,  C04B35/66

CPC classification number: C04B35/66 ,  B22D41/18 ,  B22D41/54

Abstract: A dense carbon free surface is provided on a carbon bonded refractory shape which is particularly useful as a pouring tube liner to prevent the formation and build-up of alumina particles which may cause blockage of the tube. The carbon free, dense layer is also hard and erosion resistant making it ideal for use in other applications such as stopper rod noses. The material comprises a refractory mix having a major component of refractory oxides such as alumina and zirconia-mullite. Less than 10 wt. % carbon in the form of graphite and binder is in the mix plus about 2-5 wt. % of a metal such as silicon and an effective mount of sintering aids is also present. The pressed shape is preheated to a temperature of 1000.degree. -1400.degree. C. in air to oxidize the exposed surface of the shape and then to sinter the oxidized surface to form the desired dense, carbon free surface over the entire shape or on selected surface portions thereof.

Abstract translation: 在碳粘合耐火形状上提供无碳的密实表面，其特别可用作浇注管衬套，以防止可能导致管堵塞的氧化铝颗粒的形成和积聚。 无碳，致密的层也是坚硬和耐腐蚀的，使其非常适用于其他应用，如塞杆鼻。 该材料包括具有耐火氧化物的主要组分如氧化铝和氧化锆 - 莫来石的耐火混合物。 小于10重量 石墨和粘合剂形式的％碳在混合物中加上约2-5wt。 还存在％的金属如硅和有效安装的烧结助剂。 将压制形状在空气中预热至1000-140℃，以氧化形状的暴露表面，然后烧结氧化表面，以在整个形状或选定表面上形成所需的致密，无碳的表面 部分。