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公开(公告)号：US6075812A
公开(公告)日：2000-06-13
申请号：US48651
申请日：1998-03-26
IPC分类号： H03M7/30 , H04B1/707 , H04B1/711 , H04B14/04 , H04J11/00 , H04J13/00 , H04J13/10 , H04L1/00 , H04L12/28 , H04L27/18 , H04L27/20 , H04B14/707
CPC分类号： H04B1/711 , H04B1/707 , H04J13/0048 , H04J13/102 , H04B2201/709709 , H04W84/12
摘要： An apparatus and method for communicating data between at least two data devices, suitable for use as a wireless local-area network, that provides robust data communication via a radio communications channel corrupted by multipath interference, particularly at high data rates. A preferred embodiment of the invention represents data as a sequence of Walsh-function waveforms encoded by pseudo-noise direct-sequence spread-spectrum modulation. Walsh-function-encoding of the data provides a long symbol duration, thereby allowing the spread-spectrum modulation to provide processing gain sufficient to substantially overcome multipath interference, while providing a high data rate. In another preferred embodiment, Walsh-function modulation is supplemented with various forms of phase modulation, such as coherent PSK for bi-orthogonal signalling, and DPSK between orthogonal symbols for noncoherent bi-orthogonal signalling, thereby further increasing data rate without reducing processing gain. In another preferred embodiment, Walsh-function modulation is supplemented with spectral shaping to allow increased bandwidth occupancy, thereby further increasing the processing gain without sacrificing data rate.
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2.发明授权Antijam protected GPS-based measurement of roll rate and roll angle of spinning platforms 有权Antijam保护基于GPS的旋转平台滚动速率和滚动角度的测量公开(公告)号：US08106811B2
公开(公告)日：2012-01-31
申请号：US12454306
申请日：2009-05-15
申请人： Wallace E. Vander Velde , John H. Cafarella , Huan-Wan Tseng , George Dimos , Triveni N. Upadhyay , Jianhui Luo
发明人： Wallace E. Vander Velde , John H. Cafarella , Huan-Wan Tseng , George Dimos , Triveni N. Upadhyay , Jianhui Luo
CPC分类号： G01S19/17 , F41G7/222 , F41G7/305 , G01S19/21 , G01S19/37 , G01S19/39 , G05D1/108 , H04K3/228 , H04K3/90
摘要： A system and method for determining the roll rate and roll angle of a spinning platform in a jamming environment, by suppressing the interference signals from the received GPS signals and using the measured phase and amplitude differences between the GPS satellite signals received on two or more antennas. The measured signal differences and the navigation solution from a GPS receiver are processed in a roll filter to obtain the desired information. Data from non-GPS measurement sources is optionally provided to update the navigation solution. Although of wide applicability, the invention is uniquely suited to the measurement of roll rates and roll angles of fast spinning platforms with small baselines in the presence of jamming, and where the antennas are separated from each other by distances that are a fraction of the GPS signal wavelength.
摘要翻译： 一种用于通过抑制来自接收到的GPS信号的干扰信号并且使用在两个或更多个天线上接收的GPS卫星信号之间的测量相位和幅度差来确定干扰环境中的旋转平台的滚动速率和滚动角度的系统和方法 。 来自GPS接收机的测量信号差异和导航解决方案在辊式滤波器中处理以获得所需信息。 可选地提供来自非GPS测量源的数据来更新导航解决方案。 虽然本发明具有广泛的适用性，但是本发明独特地适用于在存在干扰的情况下测量具有小基线的快速旋转平台的滚动速率和滚动角度，并且其中天线彼此分开距离是GPS的一部分 信号波长。
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3.发明申请Antijam protected GPS-based measurement of roll rate and roll angle of spinning platforms 有权Antijam保护基于GPS的旋转平台滚动速率和滚动角度的测量公开(公告)号：US20100289687A1
公开(公告)日：2010-11-18
申请号：US12454306
申请日：2009-05-15
申请人： Wallace E. Vander Velde , John H. Cafarella , Huan-Wan Tseng , George Dimos , Teiveni N. Upadhyay , Jianhui Luo
发明人： Wallace E. Vander Velde , John H. Cafarella , Huan-Wan Tseng , George Dimos , Teiveni N. Upadhyay , Jianhui Luo
CPC分类号： G01S19/17 , F41G7/222 , F41G7/305 , G01S19/21 , G01S19/37 , G01S19/39 , G05D1/108 , H04K3/228 , H04K3/90
摘要： A system and method for determining the roll rate and roll angle of a spinning platform in a jamming environment, by suppressing the interference signals from the received GPS signals and using the measured phase and amplitude differences between the GPS satellite signals received on two or more antennas. The measured signal differences and the navigation solution from a GPS receiver are processed in a roll filter to obtain the desired information. Data from non-GPS measurement sources is optionally provided to update the navigation solution. Although of wide applicability, the invention is uniquely suited to the measurement of roll rates and roll angles of fast spinning platforms with small baselines in the presence of jamming, and where the antennas are separated from each other by distances that are a fraction of the GPS signal wavelength.
摘要翻译： 一种用于通过抑制来自接收到的GPS信号的干扰信号并且使用在两个或更多个天线上接收的GPS卫星信号之间的测量相位和幅度差来确定干扰环境中的旋转平台的滚动速率和滚动角度的系统和方法 。 来自GPS接收机的测量信号差异和导航解决方案在辊式滤波器中处理以获得所需信息。 可选地提供来自非GPS测量源的数据来更新导航解决方案。 虽然本发明具有广泛的适用性，但是本发明独特地适用于在存在干扰的情况下测量具有小基线的快速旋转平台的滚动速率和滚动角度，并且其中天线彼此分开距离是GPS的一部分 信号波长。
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4.发明授权Wireless communications system for transmitting and receiving data with increased data rates and robustness 失效无线通信系统，用于以更高的数据速率和鲁棒性发送和接收数据
公开(公告)号：US6067313A
公开(公告)日：2000-05-23
申请号：US102416
申请日：1998-06-22
CPC分类号： H04L23/02 , H04J13/004 , H04J13/12 , H04J13/18
摘要： A data communications system for conveying a series of input data symbols includes a transmitter subsystem and a receiver subsystem. The transmitter subsystem generates a series of composite waveforms corresponding to a series of input data symbols by selecting from a set of mutually orthogonal component waveforms, then combines contemporaneous portions of at least two of the component waveforms so as to form a composite waveform which is unique to the data symbol. The transmit subsystem uses the composite waveform to modulate a carrier signal and transmits the carrier signal over a communications channel. The receiver subsystem receives the carrier signal and recovers the composite waveform from the carrier signal. The receiver subsystem identifies the data symbol by, at least in part, decompositioning the composite waveforms into their constituent component waveforms so as to identify which composite waveforms have been transmitted.
摘要翻译： 用于传送一系列输入数据符号的数据通信系统包括发射机子系统和接收机子系统。 发射机子系统通过从一组相互正交的分量波形中选择，产生一系列对应于一系列输入数据符号的复合波形，然后组合至少两个分量波形的同时部分，以形成独特的复合波形 到数据符号。 传输子系统使用复合波形来调制载波信号，并通过通信信道发送载波信号。 接收机子系统接收载波信号，并从载波信号中恢复复合波形。 接收器子系统通过至少部分地将复合波形分解成其组成分量波形来识别数据符号，以便识别哪些复合波形已被发送。
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公开(公告)号：US4101965A
公开(公告)日：1978-07-18
申请号：US690601
申请日：1976-05-27
CPC分类号： G06G7/195
摘要： A surface acoustic wave device utilizing a piezoelectric substrate capable of propagating traveling acoustic waves along a surface thereof and a semiconductive substrate positioned adjacent such surface, the latter substrate having an array of diodes, preferably Schottky diodes, disposed in the surface thereof opposite the piezoelectric substrate to form an interaction region. Application of a signal uniformly over the interaction region will charge the diodes uniformly and a traveling acoustic wave will interact with the uniformly applied signal to alter the charging pattern of the array in accordance with the acoustic wave amplitude to produce a corresponding altered conductivity pattern in the semiconductor substrate representing the interaction of the uniformly applied signal and the traveling wave signal. A second signal can thereupon be propagated along the piezoelectric substrate to interact with the stored altered conductivity pattern to provide either correlation or convolution operation depending on the direction of propagation thereof along the piezoelectric surface.
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6.发明授权公开(公告)号：US08269667B2
公开(公告)日：2012-09-18
申请号：US13373494
申请日：2011-11-16
申请人： Wallace E. Vander Velde , John H. Cafarella , Huan-Wan Tseng , George Dimos , Triveni N. Upadhyay , Jianhui Luo
发明人： Wallace E. Vander Velde , John H. Cafarella , Huan-Wan Tseng , George Dimos , Triveni N. Upadhyay , Jianhui Luo
IPC分类号： G01S19/53
CPC分类号： G01S19/17 , F41G7/222 , F41G7/305 , G01S19/21 , G01S19/37 , G01S19/39 , G05D1/108 , H04K3/228 , H04K3/90
摘要： A system and method for determining the roll rate and roll angle of a spinning platform by using the measured phase and/or amplitude differences between the GPS satellite signals received on two or more antennas. The measured signal differences and the navigation solution from a GPS receiver are processed in a roll filter to obtain the desired information. Data from non-GPS measurement sources is optionally provided to update the navigation solution. Although of wide applicability, the invention is uniquely suited to the measurement of roll rates and roll angles of fast spinning platforms with small baselines in the presence as well as in the absence of jamming, and where the antennas are separated from each other by distances that are a fraction of the GPS signal wavelength.
摘要翻译： 一种用于通过使用在两个或更多个天线上接收的GPS卫星信号之间的测量相位和/或幅度差来确定旋转平台的滚动速率和滚动角度的系统和方法。 来自GPS接收机的测量信号差异和导航解决方案在辊式滤波器中处理以获得所需信息。 可选地提供来自非GPS测量源的数据来更新导航解决方案。 虽然本发明具有广泛的适用性，但是本发明独特地适用于在存在和没有干扰的情况下测量具有小基线的快速纺丝平台的滚动速率和滚动角度，并且其中天线彼此分开距离 是GPS信号波长的一小部分。
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公开(公告)号：US07346313B2
公开(公告)日：2008-03-18
申请号：US10379352
申请日：2003-03-04
申请人： John H. Cafarella
发明人： John H. Cafarella
IPC分类号： H04B17/00
CPC分类号： H04L27/364 , H04B1/30 , H04L5/16 , H04L27/3863 , H04L2027/0016 , H04L2027/0022
摘要： Transceivers using direct conversion between baseband and RF have become popular for low-cost designs. Bandwidth-efficient modulations employ information on both phases of the carrier, and for high-order signaling alphabets, it becomes problematic to realize Direct-Conversion transceivers for which adequate gain balance between I and Q channels throughout the transmit and receive chains. For heterodyne transceivers I-Q balance is often less of an issue, by contrast, because most of the required gain operates at an Intermediate Frequency. In both cases, the trend toward lower supply voltages further exacerbates this problem because of the poorer control of analog parameters at low voltage. The present invention addresses this difficulty via a calibration method and system in which a calibration signal is generated in the transmit stage and injected into the receive stage so that any mismatches in gain can be observed and corrected.
摘要翻译： 使用基带和RF之间的直接转换的收发器已经成为低成本设计的普及。 带宽有效的调制采用载波两个方面的信息，对于高阶信令字母，实现直接转换收发器变得有问题，在整个发送和接收链中I和Q信道之间的充分增益平衡。 对于外差收发器，I-Q平衡通常不是一个问题，相比之下，因为大多数所需的增益在中频。 在这两种情况下，由于低电压模拟参数的控制较差，电源电压降低的趋势进一步加剧了该问题。 本发明通过校准方法和系统来解决这个困难，其中在发射级中产生校准信号并将其注入到接收级，使得可以观察和校正增益中的任何失配。
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公开(公告)号：US07627398B1
公开(公告)日：2009-12-01
申请号：US11355783
申请日：2006-02-16
CPC分类号： H04L12/10
摘要： An apparatus for measuring characteristics of a at least one Power Over Ethernet (PoE) Power Sourcing Equipment (PSE) device (also referred to as a PSE test blade) is presented. The apparatus includes a port controller and a current loading circuit in communication with the port controller. The apparatus further includes a resistance loading circuit in communication with the port controller, a capacitance loading circuit in communication with the port controller, and a load current and voltage measuring circuit in communication with the port controller. The apparatus further includes a first network providing the power signals to at least one of the current loading circuit, the resistance loading circuit, the capacitance loading circuit, and the load current and voltage measuring circuit. The port controller utilizes a set of test primitives which are accessed in real time via a user interface to execute test sequences for characterizing PSE devices.
摘要翻译： 提出了一种用于测量至少一个以太网供电设备（PSE）设备（也称为PSE测试刀片）的特性的设备。 该装置包括与端口控制器通信的端口控制器和电流加载电路。 该装置还包括与端口控制器通信的电阻加载电路，与端口控制器通信的电容加载电路，以及与端口控制器通信的负载电流和电压测量电路。 该装置还包括向电流负载电路，电阻负载电路，电容负载电路和负载电流和电压测量电路中的至少一个提供功率信号的第一网络。 端口控制器利用一组测试原语，这些测试原语通过用户界面实时访问，以执行用于表征PSE设备的测试序列。
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9.发明授权Unconstrained pointing interface for natural human interaction with a display-based computer system 失效无约束的指点界面，用于与基于显示的计算机系统进行自然人机交互公开(公告)号：US06404416B1
公开(公告)日：2002-06-11
申请号：US09030646
申请日：1998-02-25
申请人： Robert E. Kahn , John H. Cafarella
发明人： Robert E. Kahn , John H. Cafarella
IPC分类号： G09G508
CPC分类号： G06F3/0386 , G06F3/03542 , G06F3/037
摘要： An unconstrained pointing interface for natural human interaction with a display-based computer system includes a hand-manipulated pointer configured to permit it to be (1) aimed by line of sight to point at any arbitrary position within the user's field of view, including positions beyond the user's natural reach, and (2) swept along any arbitrary path and at any arbitrary speed within the user's natural capability. A detector detects emanations from at least some positions at which the pointer may be aimed; and circuitry identifies the locations of positions at which the user is aiming the pointer. The interface enables the user to point to a position within his field of view and beyond his reach, move his hand along any arbitrary path and at any arbitrary speed within the user's natural capability to point to another position, and so on, and to have the circuitry automatically identify the locations of the series of positions to which he has pointed.
摘要翻译： 用于与基于显示器的计算机系统的自然人类交互的无约束指向界面包括手动操纵的指示器，其被配置为允许其（1）通过视线瞄准以指向用户的视场内的任意位置，包括位置 超越用户的自然范围，以及（2）在用户的自然能力范围内以任意任意的速度扫描任意速度。 检测器检测来自指针可能被瞄准的至少一些位置的发射; 并且电路识别用户瞄准指示器的位置的位置。 该界面使用户能够指向他的视野内的位置，超出他的距离，在用户的自然能力内以任意的任意路径和任意速度移动他的手指向另一个位置，等等，并具有 电路自动识别他所指向的一系列位置的位置。
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公开(公告)号：US5809060A
公开(公告)日：1998-09-15
申请号：US369778
申请日：1994-12-30
CPC分类号： H04B1/711 , H04B1/707 , H04J13/0074 , H04L27/205 , H04B2201/709709 , H04L1/0057 , H04W28/06 , H04W84/12
摘要： An apparatus and method for communicating data between at least two data devices, suitable for use as a wireless local-area network, that provides robust data communication via a radio communications channel corrupted by multipath interference, particularly at high data rates. A preferred embodiment of the invention represents data as a sequence of Walsh-function waveforms encoded by pseudo-noise direct-sequence spread-spectrum modulation. Walsh-function-encoding of the data provides a long symbol duration, thereby allowing the spread-spectrum modulation to provide processing gain sufficient to substantially overcome multipath interference, while providing a high data rate. In another preferred embodiment, Walsh-function modulation is supplemented with various forms of phase modulation, such as coherent PSK for bi-orthogonal signalling, and DPSK between orthogonal symbols for noncoherent bi-orthogonal signalling, thereby further increasing data rate without reducing processing gain. In another preferred embodiment, Walsh-function modulation is supplemented with spectral shaping to allow increased bandwidth occupancy, thereby further increasing the processing gain without sacrificing data rate.
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