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公开(公告)号：US5307206A
公开(公告)日：1994-04-26
申请号：US954525
申请日：1992-09-30
CPC分类号： G02B27/017 , F41G3/225 , G02B23/00 , G02B2027/0187
摘要： An arrangement for stabilizing the line of sight in an optical tracking system relative to inertial space over a specified range of frequencies utilizing a mirror/torquer/pickoff subassembly both as an inertial sensor and as a control effector.
摘要翻译： 一种用于在光学跟踪系统中相对于惯性空间在指定频率范围内稳定视线的装置，其利用作为惯性传感器和作为控制执行器的反射镜/扩散/拾取子组件。
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2.发明授权Mirror positioning assembly for stabilizing the line-of-sight in a two-axis line-of-sight pointing system 失效用于在双轴视线指向系统中稳定视线的镜子定位组件
公开(公告)号：US5220456A
公开(公告)日：1993-06-15
申请号：US802870
申请日：1991-12-06
IPC分类号： G02B27/64
CPC分类号： G02B27/64
摘要： An arrangement for stabilizing the line of sight in an optical tracking system by isolating the line of sight from angular vibration induced by the coarse positioning system. The tracking error of the coarse positioning system is transformed from its existing coordinate system onto the line of sight (scene) coordinates and this transformed error is utilized for stabilization.
摘要翻译： 一种用于通过将视线与由粗定位系统引起的角振动隔离的方式来稳定光学跟踪系统中的视线的装置。 粗定位系统的跟踪误差从现有的坐标系变换到视线（场景）坐标，该变换误差被用于稳定。
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公开(公告)号：US5999139A
公开(公告)日：1999-12-07
申请号：US924418
申请日：1997-08-27
CPC分类号： H01Q1/125 , H01Q1/1257
摘要： A two-axis satellite antenna mounting and tracking assembly including a universal joint for mounting the antenna to support structure. A pair of linear actuators offset at 90.degree. to each other about the universal joint are operated in full-on/full-off fashion to control the azimuth and elevation orientations of the antenna. Satellite tracking is effected by maximizing received signal strength.
摘要翻译： 一个双轴卫星天线安装和跟踪组件，包括用于将天线安装到支撑结构的万向节。 一对围绕万向接头彼此以90°偏移的线性致动器以全开/全关方式工作，以控制天线的方位角和仰角。 通过最大化接收信号强度来实现卫星跟踪。
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公开(公告)号：US08976837B1
公开(公告)日：2015-03-10
申请号：US13569330
申请日：2012-08-08
IPC分类号： H04B1/00
CPC分类号： H04B14/026 , H04B1/713 , H04B1/71632
摘要： A system and method for generating a low probability of detection (LPD) waveform is presented. The method modulates pre-modulated symbols using pulse-position modulation (PPM) to produce PPM modulated signals with a modulated in-phase (I) component and a modulated quadrature (Q) component. Next, frequency hopping is used to transmit the modulated I component at a randomized start time within a time slot and to transmit the modulated Q component at the randomized start time within the same slot. The modulated Q component does not overlap with the modulated I component. The method can also overlay transmission security (TRANSEC) pseudorandom (PN) overlay on the modulated Q component and the modulated I component before the modulated Q component and the modulated I component are transmitted.
摘要翻译： 提出了一种生成低概率（LPD）波形的系统和方法。 该方法使用脉冲位置调制（PPM）来调制预调制符号，以产生具有调制同相（I）分量和调制正交（Q）分量的PPM调制信号。 接下来，使用跳频来在时隙内的随机开始时间发送调制的I分量，并且在同一时隙内的随机开始时间发送调制的Q分量。 调制的Q分量与调制的I分量不重叠。 该方法还可以在调制的Q分量和调制的I分量被发送之前，在调制的Q分量和调制的I分量上叠加传输安全性（TRANSEC）伪随机（PN）覆盖。
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公开(公告)号：US08659989B2
公开(公告)日：2014-02-25
申请号：US13022078
申请日：2011-02-07
CPC分类号： H04L43/0858 , G01S5/0221
摘要： A system and method for calculating a time of arrival (TOA) of an electromagnetic signal is presented. A method receives a fast Fourier transform (FFT) signal that is a FFT of an original electromagnetic signal containing symbol data. The FFT signal is either multiplied or divided with a value to remove the symbol data. Removing the symbol data generates a perturbed data values representing perturbed signal with a perturbed covariance. The method calculates a perturbed covariance of the perturbed data values. After the perturbed covariance is calculated, the method at least partially corrects the perturbed covariance to produce a corrected covariance. The TOA of the original electromagnetic signal is calculated based, at least in part, on the perturbed covariance.
摘要翻译： 提出了一种用于计算电磁信号到达时间（TOA）的系统和方法。 一种方法接收作为包含符号数据的原始电磁信号的FFT的快速傅里叶变换（FFT）信号。 FFT信号被乘以或除以一个值去除符号数据。 去除符号数据会产生扰动的数据值，表示扰动信号与扰动协方差。 该方法计算扰动数据值的扰动协方差。 在计算了扰动协方差之后，该方法至少部分地校正扰动协方差以产生校正的协方差。 至少部分地基于扰动协方差来计算原始电磁信号的TOA。
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公开(公告)号：US20110194402A1
公开(公告)日：2011-08-11
申请号：US13022078
申请日：2011-02-07
CPC分类号： H04L43/0858 , G01S5/0221
摘要： A system and method for calculating a time of arrival (TOA) of an electromagnetic signal is presented. A method receives a fast Fourier transform (FFT) signal that is a FFT of an original electromagnetic signal containing symbol data. The FFT signal is either multiplied or divided with a value to remove the symbol data. Removing the symbol data generates a perturbed data values representing perturbed signal with a perturbed covariance. The method calculates a perturbed covariance of the perturbed data values. After the perturbed covariance is calculated, the method at least partially corrects the perturbed covariance to produce a corrected covariance. The TOA of the original electromagnetic signal is calculated based, at least in part, on the perturbed covariance.
摘要翻译： 提出了一种用于计算电磁信号到达时间（TOA）的系统和方法。 一种方法接收作为包含符号数据的原始电磁信号的FFT的快速傅里叶变换（FFT）信号。 FFT信号被乘以或除以一个值去除符号数据。 去除符号数据会产生扰动的数据值，表示扰动信号与扰动协方差。 该方法计算扰动数据值的扰动协方差。 在计算了扰动协方差之后，该方法至少部分地校正扰动协方差以产生校正的协方差。 至少部分地基于扰动协方差来计算原始电磁信号的TOA。
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公开(公告)号：US4881800A
公开(公告)日：1989-11-21
申请号：US194367
申请日：1988-05-16
申请人： Charles R. Fuchs , David A. Haessig, Jr. , David L. Heckathorn , Jordan S. Kass , Peter Lindsay , Joseph J. Volpe
发明人： Charles R. Fuchs , David A. Haessig, Jr. , David L. Heckathorn , Jordan S. Kass , Peter Lindsay , Joseph J. Volpe
IPC分类号： G02B27/64
CPC分类号： G02B27/64 , Y10T74/1218
摘要： To stabilize the line-of-sight of an optical image relative to a commanded line-of-sight, a stabilization system consisting of a mirror having two limited degrees of freedom, a two axis gyroscope having its two sensitive axes perpendicular to the LOS, a pickoff sensor feeding back mirror angular position, servo compensators that provide mirror torque commands to a two axis mirror torquer, and the electronic hardware that ties these components together is used.
摘要翻译： 为了稳定相对于命令视线的光学图像的视距，由具有两个有限自由度的反射镜组成的稳定系统，具有垂直于LOS的两个敏感轴的双轴陀螺仪， 使用向后反射镜角度位置的传感器传感器，向双轴镜面镜提供反射镜扭矩命令的伺服补偿器以及将这些部件连接在一起的电子硬件。
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