公开(公告)号：US06819103B2

公开(公告)日：2004-11-16

申请号：US10276983

申请日：2002-11-21

申请人： John L. Champion ,  Robert Osiander ,  Robert B. Givens ,  Dennis K. Wickenden ,  Daniel G. Jablonski ,  James H. Higbie ,  Scott T. Radcliffe ,  Margaret A. Darrin ,  Thomas J. Kistenmacher ,  Douglas A. Oursler

发明人： John L. Champion ,  Robert Osiander ,  Robert B. Givens ,  Dennis K. Wickenden ,  Daniel G. Jablonski ,  James H. Higbie ,  Scott T. Radcliffe ,  Margaret A. Darrin ,  Thomas J. Kistenmacher ,  Douglas A. Oursler

IPC分类号： G01R3300

CPC分类号： H03H9/2447 ,  H03D7/00 ,  H03H9/02259 ,  H03H2009/02511

摘要： A Lorentz force-driven mechanical resonator apparatus that utilizes a high-Q resonant structure as both a mixing device and a high-Q bandpass filter. Specifically, an external time varying, but quasistatic, magnetic field is applied to the resonating device while simultaneously running a time varying electrical current through the device. The resulting Lorentz force (I×B) is proportional to the vector product of the electrical current in the bar (I) and the external magnetic field (B). Integrating such a resonant device with a magnetic field coil produces the functionality of an ideal radio frequency (RF) mixer coupled with a high-Q intermediate frequency (IF) filter. Wide tunability provides the capability to scan, or even step, an array of filters having very narrow bandwidths via a common local oscillator to a desired frequency range.

摘要翻译： 利用高Q谐振结构作为混合装置和高Q带通滤波器的洛伦兹力驱动机械谐振器装置。 具体地，外部时变，但准静态的磁场被施加到谐振装置，同时同时运行时变电流通过该装置。 所产生的洛伦兹力（IxB）与条（I）中的电流和外部磁场（B）的矢量积成比例。 将这种谐振装置与磁场线圈集成产生与高Q中频（IF）滤波器耦合的理想射频（RF）混频器的功能。 宽可调性提供了通过公共本地振荡器扫描甚至步进具有非常窄带宽的滤波器阵列至所需频率范围的能力。

公开(公告)号：US06735427B2

公开(公告)日：2004-05-11

申请号：US10381727

申请日：2003-03-27

申请人： James H. Higbie

发明人： James H. Higbie

IPC分类号： H04B106

CPC分类号： H04K3/228 ,  H01Q3/2629 ,  H01Q3/2635 ,  H04B7/0845 ,  H04B7/0848 ,  H04B7/0851 ,  H04B7/086 ,  H04K2203/32

摘要： A system is provided which combines the advantages of Adaptive Antenna Arraying and Adaptive Locally-Optimum Detection, as well as Adaptive Filtering, signal processing techniques and achieves the capabilities of all these techniques. The present invention represents the first successful integrated system for performing signal processing techniques associated with an Adaptive Antenna Array (AAA) system and an Adaptive Locally-Optimum Detection (ALOD) system. The system automatically distributes interference signals among Adaptive Antenna Arraying and Adaptive Locally-Optimum Detection sub-systems according to which sub-system's algorithms can provide a more optimum suppression of the interference signals. The system permits an adaptive antenna array with a given number of antenna elements to effectively suppress a larger number of interferers than it otherwise could, and to adapt more quickly to a rapidly changing interference scenario. For an adaptive antenna array with a small number of antenna elements, e.g., two to four, the system provides added interference suppression capability than could be done by adding antenna elements to the adaptive antenna array. The system is primarily designed for incorporation within systems using Direct Sequence Spread Spectrum signals, such as Global Positioning System (GPS) signals. In a preferred embodiment the inventive system is incorporated within a conventional GPS receiver which tends to be vulnerable to jamming by interference signals.

摘要翻译： 提供了一种结合自适应天线阵列和自适应本地优化检测的优点以及自适应滤波，信号处理技术并实现所有这些技术的能力的系统。 本发明代表用于执行与自适应天线阵列（AAA）系统和自适应局部最佳检测（ALOD）系统相关联的信号处理技术的第一个成功的集成系统。 该系统根据哪个子系统的算法可以更好地抑制干扰信号，自动分配自适应天线阵列和自适应本地优化检测子系统之间的干扰信号。 该系统允许具有给定数量的天线元件的自适应天线阵列以有效地抑制更多数量的干扰源，否则可以更快地适应于快速变化的干扰场景。 对于具有少量天线元件（例如2至4个）的自适应天线阵列，该系统提供了比通过将天线元件添加到自适应天线阵列可以实现的附加的干扰抑制能力。 该系统主要设计用于使用直接序列扩频信号（如全球定位系统（GPS））信号在系统内并入。 在优选实施例中，本发明的系统被并入传统的GPS接收机中，其倾向于易受干扰信号的干扰。

公开(公告)号：US07197143B2

公开(公告)日：2007-03-27

申请号：US10345919

申请日：2003-01-16

申请人： Thomas E. Duerr ,  Nicholas D. Beser ,  James H. Higbie ,  Donna C. Paulhamus ,  Michael A. Karls ,  Cash J. Costello ,  George R. Barrett

发明人： Thomas E. Duerr ,  Nicholas D. Beser ,  James H. Higbie ,  Donna C. Paulhamus ,  Michael A. Karls ,  Cash J. Costello ,  George R. Barrett

IPC分类号： H04N1/44 ,  H04N5/913 ,  H04N5/919

CPC分类号： G11B20/0021 ,  G11B19/122 ,  G11B20/00086 ,  G11B20/00123 ,  G11B20/00173 ,  G11B23/28 ,  G11B27/28 ,  G11B2220/90 ,  H04N5/765 ,  H04N5/772

摘要： The Digital Video Authenticator (DVA) addresses law enforcement concerns for a means to authenticate digital video (DV) so that it will be admissible and trusted as evidence in court. The DVA is a peripheral device attached to a commercial digital video recording device whose purpose is to generate and record authentication data simultaneously as DV is recorded by the video recording device. Verification of the authenticity of a DV sample will be accomplished using non-real-time software tools. The DVA system and method reads digital video (DV) data from a digital video recording device; parses the DV data into elements representing video, audio, control and timing data; and creates digital signatures that can be used to validate the original DV tape. The combination of secure digital signatures and repeatability of the DV data stored on tape provides the basis for proving the original video has not been modified.

摘要翻译： 数字视频认证器（DVA）解决了执法问题，以便对数字视频（DV）进行认证，以使其在法庭上被接受和信任为证据。 DVA是连接到商业数字视频记录设备的外围设备，其目的是在视频记录设备记录DV时同时产生和记录认证数据。 使用非实时软件工具来验证DV样本的真实性。 DVA系统和方法从数字视频记录装置读取数字视频（DV）数据; 将DV数据解析为表示视频，音频，控制和定时数据的元素; 并创建可用于验证原始DV磁带的数字签名。 安全数字签名和存储在磁带上的DV数据的可重复性的组合为证明原始视频尚未被修改提供依据。

公开(公告)号：US5018088A

公开(公告)日：1991-05-21

申请号：US415697

申请日：1989-10-02

申请人： James H. Higbie

发明人： James H. Higbie

IPC分类号： H03H21/00

CPC分类号： H03H21/0012

摘要： A signal processing technique is described which suppresses interference in spread-spectrum communications receive systems by optimizing the detection process dynamically against the current interference. This is accomplished by estimating the statistics of the interference and then using this information to derive the locally-optimum mapping to apply to the signal of interest plus interference. As the statistics of the interference change, the measured distributions and the resulting transformations also change. The adaptation is open loop so convergence problems do not arise.

摘要翻译： 描述了通过针对当前干扰动态地优化检测过程来抑制扩频通信接收系统中的干扰的信号处理技术。 这是通过估计干扰的统计，然后使用该信息来导出本地最佳映射来应用于感兴趣的信号加干扰来实现的。 作为干扰变化的统计，测量分布和所得变换也发生变化。 适应是开环，因此不会出现收敛问题。