公开(公告)号：US6166683A

公开(公告)日：2000-12-26

申请号：US26545

申请日：1998-02-19

申请人： Patrick Y. Hwang

发明人： Patrick Y. Hwang

IPC分类号： G01S1/00 ,  G01S5/02 ,  G01S5/14 ,  G01S19/15 ,  G01S19/44 ,  G01S19/51

CPC分类号： G01S19/20 ,  G01S19/29 ,  G01S19/55

摘要： A system and method of detecting and correcting for cycle slip in a GPS attitude determination system is presented. The method employs several techniques for detecting and correcting for faults in high integrity carrier phase-related applications. A delta single difference is used as a primary measurement residual in detecting cycle slip. The delta single difference represents the difference in phase of a carrier signal of a GPS satellite at two receiving antennas over two points in time. This delta single difference is compared to a detection failure threshold computed based on certain high integrity needs. Satellites showing a failure are excluded. In addition, satellites that fail a detectability test, indicating the inability to detect a fault, are pre-excluded from attitude solution computation. When re-resolving integer ambiguities associated with fault detection and correction, the method ensures that the integer ambiguity is resolvable via a resolvability algorithm before implementing a solution-based integer ambiguity resolution.

摘要翻译： 提出了一种在GPS姿态测定系统中检测和校正循环滑移的方法。 该方法采用几种技术来检测和校正高完整性载波相位应用中的故障。 在检测循环滑移中，使用Δ单位差作为主要测量残差。 Δ单差表示两个接收天线上两个时间点的GPS卫星的载波信号的相位差。 将该delta差异与基于某些高完整性需求计算的检测失败阈值进行比较。 显示故障的卫星被排除在外。 另外，无法检测到故障的可检测性测试的卫星也被排除在姿态解决方案计算之外。 当重新解决与故障检测和校正相关联的整数模糊度时，该方法可确保在实现基于解的整数模糊度分辨率之前通过可解析性算法可解析整数模糊度。

公开(公告)号：US6101216A

公开(公告)日：2000-08-08

申请号：US943484

申请日：1997-10-03

申请人： P. Michael Henderson ,  Kenneth D. Ko ,  Edward S. Zuranski ,  Jamal Haque ,  Shrenik P. Patravali ,  Manuel I. Rodriguez ,  Keith A. Souders ,  Anthony A. Tzouris

发明人： P. Michael Henderson ,  Kenneth D. Ko ,  Edward S. Zuranski ,  Jamal Haque ,  Shrenik P. Patravali ,  Manuel I. Rodriguez ,  Keith A. Souders ,  Anthony A. Tzouris

IPC分类号： H04L27/34 ,  H04L1/00 ,  H04L7/04 ,  H04L7/10 ,  H04L12/56 ,  H04L27/00 ,  H04L29/10 ,  H04M11/00 ,  H04M11/06 ,  H04Q3/42 ,  H04B1/38

CPC分类号： H04L1/0057 ,  H04L1/0002 ,  H04L27/0002 ,  H04L47/10 ,  H04L7/048 ,  H04M11/062 ,  H04L1/0021 ,  H04L7/10 ,  Y02B60/31

摘要： A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem utilizes quadrature amplitude modulated (QAM) signals and frequency division multiplexing. The digital subscriber line modem includes a control circuit which includes a rapid retrain circuit. The rapid retrain circuit can retrain the digital subscriber line modem in less than 0.5 seconds.

摘要翻译： 数字用户线路通信系统不需要在居民的家中使用普通老式电话服务（POTS）分离器。 利用数字信号处理技术来适应由POTS电话设备引起的不同用户线路状况。 数字信号处理技术通过减少由于不同的用户线路特性引起的失真的敏感性而消除对分路器的需要。 数字用户线路调制解调器利用正交幅度调制（QAM）信号和频分复用。 数字用户线路调制解调器包括一个控制电路，它包括一个快速的再训练电路。 快速重新训练电路可以在0.5秒以内重新训练数字用户线调制解调器。

公开(公告)号：US6046994A

公开(公告)日：2000-04-04

申请号：US784715

申请日：1997-01-16

申请人： William A. Fechalos ,  Barry W. Jones

发明人： William A. Fechalos ,  Barry W. Jones

IPC分类号： H04Q3/545 ,  H04Q11/04 ,  H04J3/02

CPC分类号： H04Q11/04 ,  H04Q3/545 ,  H04Q2213/13034 ,  H04Q2213/13056 ,  H04Q2213/13072 ,  H04Q2213/13093 ,  H04Q2213/13103 ,  H04Q2213/13106 ,  H04Q2213/13213 ,  H04Q2213/13214 ,  H04Q2213/13216 ,  H04Q2213/1322 ,  H04Q2213/13292 ,  H04Q2213/13322 ,  H04Q2213/1334 ,  H04Q2213/1336 ,  H04Q2213/13393

摘要： An apparatus and a method are provided for switching an information signal from a selected input to a selected output of a telecommunications switch. The method includes the steps of digitally sampling the information signal at the selected input of the telecommunication switch and writing the sampled information signal into a predetermined location of a data frame within a circulating data loop at a first station of the circulating data loop. The method further includes the steps of capturing the sampled information signal at a second station of the circulating data loop and transferring the captured information signal to the selected output of the telecommunications switch.

摘要翻译： 提供了一种用于将信息信号从所选择的输入切换到电信交换机的选定输出的装置和方法。 该方法包括以下步骤：在电信交换机的所选择的输入处对信息信号进行数字采样，并将采样的信息信号写入循环数据循环的第一站的循环数据循环内的数据帧的预定位置。 该方法还包括以下步骤：在循环数据环路的第二站捕获采样的信息信号，并将所捕获的信息信号传送到电信交换机的所选输出端。

公开(公告)号：US5999123A

公开(公告)日：1999-12-07

申请号：US527605

申请日：1995-09-13

申请人： Brent Disselkoen ,  Patrick Hwang ,  Karl Ulmer

发明人： Brent Disselkoen ,  Patrick Hwang ,  Karl Ulmer

IPC分类号： G01S5/02 ,  G01S5/14 ,  G01S19/48 ,  G01S5/08

CPC分类号： G01S19/43 ,  G01S5/0226

摘要： A system of utilizing a single radio receiver with continuously broadcast GPS signals in order to determine precise relative positioning between two arbitrary positions or to determine current position. The invention includes utilizing changes in the carrier signal as detected by the GPS receiver occurring as a result of the movement from a first position to a second position.

摘要翻译： 一种利用具有连续广播GPS信号的单个无线电接收机的系统，以便确定两个任意位置之间的精确相对定位或确定当前位置。 本发明包括利用由作为从第一位置移动到第二位置的结果而发生的GPS接收器检测到的载波信号的改变。

公开(公告)号：US5995901A

公开(公告)日：1999-11-30

申请号：US723405

申请日：1996-09-30

申请人： Gary L. Owen ,  James M. Suiter ,  Jeff M. Henry

发明人： Gary L. Owen ,  James M. Suiter ,  Jeff M. Henry

IPC分类号： G01C23/00 ,  G08G5/00 ,  G06F165/00

CPC分类号： G08G5/0021 ,  G01C23/005 ,  G08G5/0052

摘要： An FMS with the capability of automatically adjusting the view of the flight path as the flight progresses while maintaining a set viewing direction. The vertical dimension of the flight path display chosen to fill the display and provide increased readability.

摘要翻译： 具有在飞行进行时自动调整飞行路线视图并保持设定观察方向的能力的FMS。 选择飞行路径显示的垂直尺寸以填充显示并提供更高的可读性。

公开(公告)号：US5991394A

公开(公告)日：1999-11-23

申请号：US019090

申请日：1998-02-05

申请人： Anthony J. Dezonno ,  William R. Quayle

发明人： Anthony J. Dezonno ,  William R. Quayle

IPC分类号： H04L29/06 ,  H04L29/08 ,  H04M3/42 ,  H04M3/48 ,  H04M3/51 ,  H04M3/523 ,  H04M7/12 ,  H04M11/00

CPC分类号： H04M7/003 ,  H04L29/06 ,  H04M3/42195 ,  H04M3/51 ,  H04M3/5191 ,  H04L69/329 ,  H04M3/48 ,  H04M3/5231 ,  H04M7/12 ,  H04Q2213/13072 ,  H04Q2213/13152 ,  H04Q2213/13175 ,  H04Q2213/13377 ,  H04Q2213/13389 ,  Y10S379/90

摘要： A method and system (100) establishes voice communications between a computer user (102) and an agent (104) of a business over a computer network, such as the Internet (108). Using a user computer (106), the computer user (102) views advertisments of the business' products or services on the Internet (108) via customized home pages (200). When the user (102) wishes to order a product or ask additional questions about a product, the user (102) activates a "call me" button (210). A return call screen (300) is then presented to the user (102) with areas to insert a name (302), a telephone number (304) and a time to call (306). This information is packetized in a call request which is transmitted over the Internet (108) to a telephone switching system (112) associated with the business. The telephone switching system (112) subsequently dials the telephone number (304) at the time to call (306). When the user (102) answers a computer user telephone (120), the telephone switching system (112) connects the user (102) wuth the agent (104) via an agent telephone (118). The telephone switching system (112) may be comprised of a telephone computer (114) and an automatic call distributor (116).

摘要翻译： 方法和系统（100）通过诸如因特网（108）的计算机网络在计算机用户（102）和业务的代理（104）之间建立语音通信。 使用用户计算机（106），计算机用户（102）经由定制的主页（200）查看因特网上的商业产品或服务的广告（108）。 当用户（102）希望订购产品或询问关于产品的其他问题时，用户（102）激活“呼叫我”按钮（210）。 然后，返回呼叫屏幕（300）向用户（102）呈现具有插入名称（302），电话号码（304）和呼叫时间（306）的区域。 该信息在通过因特网（108）发送到与业务相关联的电话交换系统（112）的呼叫请求中进行分组。 电话交换系统（112）随后拨打电话号码（304）（306）。 当用户（102）应答计算机用户电话（120）时，电话交换系统（112）经由代理电话（118）将用户（102）连接到代理（104）。 电话交换系统（112）可以由电话计算机（114）和自动呼叫分配器（116）组成。

公开(公告)号：US5991138A

公开(公告)日：1999-11-23

申请号：US865775

申请日：1997-05-30

申请人： Richard Sklar ,  Ralph Phillipp ,  Tracy L. DeCuir ,  Lawrence Girard

发明人： Richard Sklar ,  Ralph Phillipp ,  Tracy L. DeCuir ,  Lawrence Girard

IPC分类号： B64D45/02 ,  H01C7/12

CPC分类号： B64D45/02

摘要： A lightning protection element is incorporated into the portion of an aircraft signal distribution system which connects an antenna to flight critical equipment. The lightning protection element rejects surge currents associated with direct lightning strikes on the antenna, or its surrounding radome, while passing communication signals without significant interference with those signals. In a preferred embodiment, the lightning protection element comprises an optical fiber isolator element. A segment of optical fiber in the isolator prevents surge currents associated with the lightning strikes from reaching the equipment while passing communications signals transmitted on the signal distribution system.

摘要翻译： 在将天线连接到飞行关键设备的飞行器信号分配系统的部分中并入雷电保护元件。 雷电保护元件拒绝与天线或其周围天线罩上的直接雷击相关的浪涌电流，同时通过通信信号，而不会对这些信号造成明显的干扰。 在优选实施例中，防雷元件包括光纤隔离元件。 隔离器中的一段光纤防止与雷击相关联的浪涌电流在通过在信号分配系统上传输的通信信号时到达设备。

公开(公告)号：US5986733A

公开(公告)日：1999-11-16

申请号：US56265

申请日：1993-04-30

申请人： Bruce K. Winker ,  William J. Gunning, III ,  Donald B. Taber

发明人： Bruce K. Winker ,  William J. Gunning, III ,  Donald B. Taber

IPC分类号： G02F1/1335 ,  G02F1/13363 ,  G02F1/139

CPC分类号： G02F1/133632 ,  G02F1/1396 ,  G02F1/1397 ,  G02F2413/14

摘要： A normally white liquid crystal display includes polarizer and analyzer layers having perpendicular absorbing axes. A liquid crystal layer is disposed between the polarizer layer and the analyzer layer, with its director exhibiting an azimuthal twist through the layer. First and second electrodes are proximate to first and second major surfaces of the liquid crystal layer. A first negatively birefringent compensator layer, oriented with its optical axis substantially parallel to the average direction of the optical axis within a central, nominally homeotropic region of the liquid crystal layer in its driven state, is disposed between the polarizer layer and the liquid crystal layer. A second negatively birefringent compensator layer, with a birefringence substantially the same as the birefringence of the first compensator layer and oriented with its optical axis substantially parallel to the optical axis of the first compensator layer, is disposed between the analyzer layer and the liquid crystal layer.

摘要翻译： 正常白色液晶显示器包括具有垂直吸收轴的偏振器和分析器层。 液晶层设置在偏振器层和分析器层之间，其导向器表现出通过该层的方位角扭转。 第一和第二电极靠近液晶层的第一和第二主表面。 第一负双折射补偿层，其光轴基本上平行于处于其驱动状态的液晶层的中心名义上的垂直方向的光轴的平均方向定向在偏振器层和液晶层之间 。 第二负双折射补偿层具有基本上与第一补偿层的双折射基本相同并且其光轴基本上平行于第一补偿层的光轴的双折射补偿层设置在分析器层和液晶层之间 。

公开(公告)号：US5959852A

公开(公告)日：1999-09-28

申请号：US994952

申请日：1997-12-19

申请人： Jeff J. Deloy ,  Walter H. Hewett

发明人： Jeff J. Deloy ,  Walter H. Hewett

IPC分类号： G05F1/10 ,  G05F1/40 ,  H02M1/12 ,  H02M3/24

CPC分类号： H02M1/4225 ,  Y02B70/126

摘要： A unity power factor power supply includes a boost converter. The boost converter draws current in phase with the input voltage by operating as a current regulator having a current reference control signal which tracks the line voltage waveform. A sample and hold technique is utilized to accommodate single cycle step input compensation and to reduce harmonic distortion over a wide input frequency range.

摘要翻译： 单位功率因数电源包括升压转换器。 升压转换器通过作为具有跟踪线路电压波形的电流参考控制信号的电流调节器而将电流与输入电压同相。 采样和保持技术用于适应单周期步进输入补偿，并在宽输入频率范围内减少谐波失真。

公开(公告)号：US5940027A

公开(公告)日：1999-08-17

申请号：US940634

申请日：1997-09-30

申请人： Daniel C. Forseth ,  Paul G. Jagnow ,  Mark W. Johnson ,  F. Britt Snodgrass ,  Larry D. Vittorini

发明人： Daniel C. Forseth ,  Paul G. Jagnow ,  Mark W. Johnson ,  F. Britt Snodgrass ,  Larry D. Vittorini

IPC分类号： G01S1/00 ,  G04G3/02 ,  G01S5/02 ,  H04B7/185

CPC分类号： G01S19/235 ,  G04G3/022 ,  H03L1/027

摘要： A global positioning system (GPS) receiver and high accuracy low power time source (HAL) are disclosed. The HAL provides a time source having an accuracy which is high enough for the receiver to achieve fast direct Y-code acquisition. The HAL includes an oscillator adapted to provide an uncompensated frequency signal at a desired frequency. Frequency conversion circuitry receives the uncompensated frequency signal and a control signal as inputs, and provides as an output a compensated frequency signal having an average compensated frequency which is closer to the desired frequency than is the average uncompensated frequency. A temperature sensor provides an output indicative of a temperature of the oscillator. Frequency error determining circuitry determines an error value, as a function of the temperature sensor output, which is indicative of a quantity of frequency error over time in the uncompensated frequency signal. The frequency error determining circuitry generates the control signal as a function of the determined quantity of frequency error in the uncompensated frequency signal. A counter receives the compensated frequency signal from the frequency conversion circuitry and provides as an output a digital representation of a time period based upon the compensated frequency signal.

摘要翻译： 公开了一种全球定位系统（GPS）接收机和高精度低功率时间源（HAL）。 HAL提供了具有足够高的准确度的时间源，用于接收机实现快速的直接Y码采集。 HAL包括适于以期望的频率提供未补偿的频率信号的振荡器。 频率转换电路接收未补偿的频率信号和控制信号作为输入，并且提供具有平均补偿频率的补偿频率信号作为输出，其平均补偿频率比平均未补偿频率更接近期望频率。 温度传感器提供指示振荡器的温度的输出。 频率误差确定电路确定作为温度传感器输出的函数的误差值，其表示在未补偿的频率信号中随时间的频率误差量。 频率误差确定电路根据所确定的未补偿频率信号中的频率误差量产生控制信号。 计数器从频率转换电路接收经补偿的频率信号，并根据经补偿的频率信号提供时间周期的数字表示作为输出。