-
公开(公告)号：US07668228B2
公开(公告)日：2010-02-23
申请号：US11520353
申请日：2006-09-13
IPC分类号： H04B1/707
CPC分类号： G01S19/22 , H04B1/7085
摘要： A receiver for position-determining ranging signals transmitted by earth-orbiting satellites uses a set of accumulators, each of which accumulates signal samples corresponding with a position along the rising edges of incoming PRN pulses. An MMT processor calculates the rising edges of the direct path component of the received signal, selects the accumulator whose content correspond to a reference value related to the pulse height of the direct path component and compares the timing of the samples in that accumulator with the timing of the reference value on a reference pulse.
摘要翻译： 用于由地球轨道卫星发射的位置确定测距信号的接收机使用一组累加器，每个累加器累积与沿着进入的PRN脉冲的上升沿的位置对应的信号样本。 MMT处理器计算接收信号的直接路径分量的上升沿，选择其内容对应于与直接路径分量的脉冲高度相关的参考值的累加器，并将该累加器中的采样的定时与定时 参考脉冲的参考值。
-
公开(公告)号：US08159397B2
公开(公告)日：2012-04-17
申请号：US12640493
申请日：2009-12-17
IPC分类号： G01S3/02
CPC分类号： G01S19/05 , G01S5/0063 , G01S19/10 , G01S19/23 , G01S19/25 , G01S19/256 , G01S19/46
摘要： A system for enhancing location estimates by movable rovers including one or more base stations that engage in two way time transfer (TWTT) with the rovers. Each TWTT operation between a given base station and a given rover provides range measurements and clock differences between the base station and rover. The range measurements are based on the travel time of return TWTT signals and the clock differences are based on a phase offset of a code in the return TWTT signal and/or timing information included in the return TWTT signals.
摘要翻译： 一种用于通过可移动的漫游器增强位置估计的系统，包括一个或多个与漫游者进行双向时间传送（TWTT）的基站。 给定基站和给定流动站之间的每个TWTT操作提供基站和流动站之间的范围测量和时钟差异。 范围测量基于返回TWTT信号的行进时间，并且时钟差基于返回TWTT信号中的码的相位偏移和/或包括在返回TWTT信号中的定时信息。
-
公开(公告)号：US20100149032A1
公开(公告)日：2010-06-17
申请号：US12640493
申请日：2009-12-17
IPC分类号： G01S19/12
CPC分类号： G01S19/05 , G01S5/0063 , G01S19/10 , G01S19/23 , G01S19/25 , G01S19/256 , G01S19/46
摘要： A system for enhancing location estimates by movable rovers including one or more base stations that engage in two way time transfer (TWTT) with the rovers. Each TWTT operation between a given base station and a given rover provides range measurements and clock differences between the base station and rover. The range measurements are based on the travel time of return TWTT signals and the clock differences are based on a phase offset of a code in the return TWTT signal and/or timing information included in the return TWTT signals.
摘要翻译： 一种用于通过可移动的漫游器增强位置估计的系统，包括一个或多个与漫游者进行双向时间传送（TWTT）的基站。 给定基站和给定流动站之间的每个TWTT操作提供基站和流动站之间的范围测量和时钟差异。 范围测量基于返回TWTT信号的行进时间，并且时钟差基于返回TWTT信号中的码的相位偏移和/或包括在返回TWTT信号中的定时信息。
-
公开(公告)号：US20100109944A1
公开(公告)日：2010-05-06
申请号：US12683994
申请日：2010-01-07
CPC分类号： G01C15/00 , G01S5/0063 , G01S19/14 , G01S19/36 , G01S19/53 , G05D1/0206 , G05D1/0259 , G05D1/0278
摘要： A multi-antenna GNSS system and method provide earth-referenced GNSS heading and position solutions. The system and method compensate for partial blocking of the antennas by using a known attitude or orientation of the structure, which can be determined by an orientation device or with GNSS measurements. Multiple receiver units can optionally be provided and can share a common clock signal for processing multiple GNSS signals in unison. The system can optionally be installed on fixed or slow-moving structures, such as dams and marine vessels, and on mobile structures such as terrestrial vehicles and aircraft.
摘要翻译： 多天线GNSS系统和方法提供地球参考的GNSS航向和位置解决方案。 该系统和方法通过使用结构的已知姿态或取向来补偿天线的部分阻塞，其可以由定向装置或通过GNSS测量来确定。 可以可选地提供多个接收器单元，并且可以共享用于一致地处理多个GNSS信号的公共时钟信号。 该系统可以可选地安装在固定或缓慢移动的结构上，例如大坝和海洋船舶，以及移动结构，如陆地车辆和飞机上。
-
公开(公告)号：US07501978B2
公开(公告)日：2009-03-10
申请号：US11594291
申请日：2006-11-08
申请人： Walter J. Feller
发明人： Walter J. Feller
IPC分类号： G01S13/84
CPC分类号： G01S13/758
摘要： A system for ascertaining the range from an interrogator to one or more transponders comprises an interrogator that transmits an RF carrier that is received by each transponder, the energy in the received carrier being used to charge up a storage capacitor in each senses the termination of the received carrier and initiates a known delay interval different from those of the other transponders. At the end of the delay interval, the transponder transmits an RF signal which is received by the interrogator. The interrogator then calculates the range to the transponder by subtracting the known delay interval from the round trip time registered in the timer.
摘要翻译： 用于确定从询问器到一个或多个转发器的范围的系统包括发送由每个应答器接收的RF载波的询问器，用于对每个应答器接收的存储电容器进行充电的接收载波中的能量感测到 接收载波并发起与其他应答器不同的已知延迟间隔。 在延迟时间结束时，应答器发送由询问器接收的RF信号。 询问器然后通过从记录在定时器中的往返时间减去已知的延迟间隔来计算应答器的范围。
-
公开(公告)号：US06992624B2
公开(公告)日：2006-01-31
申请号：US10873806
申请日：2004-06-22
申请人： Walter J. Feller
发明人： Walter J. Feller
IPC分类号： G01S5/04
摘要： Apparatus and process for determining the position and heading or attitude of an antenna array are described based on radiating sources, preferably GNSS or other such satellite positioning systems. An optimum satellite is selected and the antenna array is “null steered” by combining the phase of the received signals to calculate a null or null angle that points toward the optimum satellite. The null will determine angle for elevation toward the optimum satellite and azimuth or heading. The heading is the azimuth of the (which may be actual or calculated) projection of the null vector to the satellite onto the Earth's surface. The actual location on Earth of the antenna array can be found and the antenna array azimuth with respect to the satellite can be determined. The null angle may be measured more precisely by dithering on either side to average out noise and then averaging the angle deviations to calculate the null angle. If the attitude of the antenna array with respect to the Earth's surface is desired, a null vector to a second satellite may be generated and the intersection of the two nulls will allow the attitude of the antenna array, with respect to one or both of the satellites, to be determined. The difference between the measured attitude of the antenna array with respect to the null vector and the calculated attitude of the satellite from the GNSS signals, is the attitude of the array with respect to the Earth's surface. All viewable satellites may be used, tracked, and nulls determined for each, and many antennas if in a known pattern relative to each other can be used to make the determinations more accurate and reliable.
摘要翻译： 基于辐射源（优选GNSS或其它这样的卫星定位系统）描述用于确定天线阵列的位置和航向或姿态的设备和过程。 通过组合接收信号的相位来计算指向最佳卫星的零或零角度，选择最佳卫星并且天线阵列是“空转向”。 空值将确定朝向最佳卫星和方位角或航向的仰角。 标题是空矢量对卫星到地球表面的方位（可能是实际的或计算的）。 可以找到天线阵列的地球上的实际位置，并且可以确定相对于卫星的天线阵列方位角。 可以通过任一侧的抖动来更精确地测量零点角度以平均噪声，然后对角度偏差进行平均以计算零点角度。 如果希望天线阵列相对于地球表面的姿态，则可以产生到第二卫星的零向量，并且两个零点的相交将允许天线阵列的姿态相对于一个或两个 卫星，待定。 天线阵列相对于零矢量的测量姿态与卫星与GNSS信号的计算姿态之间的差异是阵列相对于地球表面的姿态。 所有可见的卫星都可以被使用，跟踪和为每个确定的零点，并且如果以相对于彼此的已知模式可以使用许多天线来使得确定更准确和可靠。
-
公开(公告)号：US4887069A
公开(公告)日：1989-12-12
申请号：US116587
申请日：1987-11-04
IPC分类号： G08B13/24
CPC分类号： G08B13/2497
摘要： An intrusion detection system of the type using cables arranged along a perimeter to be protected and sensing changes in the electrical field around the cables caused by the presence of an intruder. The cables are divided into sections or blocks and typically only one of the sections is energized at any time. The variations caused by an intruder at the selected sections are transmitted through the intervening section to the receiver portion of a transceiver located at one end of the cables. This indicates in which section intrusion has occurred. The system uses continuous wave excitation whereby the expense and complexity of high speed switching and timing of r.f. signals are avoided.
-
公开(公告)号：US4879544A
公开(公告)日：1989-11-07
申请号：US116585
申请日：1987-11-04
申请人： Melvin C. Maki , Walter J. Feller
发明人： Melvin C. Maki , Walter J. Feller
IPC分类号： G08B13/24
CPC分类号： G01S13/04 , G01S7/03 , G08B13/2497
摘要： An intrusion detection system using waves guided by the conductive outer sheath of a coaxial cable. An r.f. signal from a transmitter is supplied between the inner conductor and outer conductor or shield in conventional fashion. Coupled wave devices are spaced along the cable; each coupled wave device transferring r.f. energy between a transmission mode within the cable and a guided mode propagated along the exterior of the conductive outer shield. In one embodiment a second coaxial cable similarly provided with coupled wave devices is spaced from the transmitter cable and has one end connected to a receiver. The change in r.f. coupling between the cables caused by an intruder produces variations in the r.f. energy coupled to the second cable which is detected at the receiver. Alternative embodiments include the use of a single cable with coupled wave devices adapted for both transmission and reception. Further alternative configurations include the use of a leaky coaxial cable, preferably buried, operating in combination with a cable provided with coupled wave devices. In some circumstances a single elongated conductor can support the guided mode. The guided mode can be established in the outer shield or single conductor by an external source and need not always be coupled from the cable interior.
-
公开(公告)号：US08307535B2
公开(公告)日：2012-11-13
申请号：US13187305
申请日：2011-07-20
申请人： Walter J. Feller , Xiaoping Wen
发明人： Walter J. Feller , Xiaoping Wen
IPC分类号： H01P11/00
CPC分类号： H01Q1/38 , H01Q5/371 , H01Q9/28 , H01Q11/083 , Y10T29/49002 , Y10T29/49016 , Y10T29/4913
摘要： A multi-frequency GNSS antenna is provided which can be manufactured from PCB materials and exhibits good multipath rejection. The antenna is capable of receiving RHCP signals from all visible GNSS satellites across a wide beamwidth. A multi-frequency GNSS antenna manufacturing method includes the steps of providing PCB base and support assemblies, first and second feed networks and connecting said first and second feed networks to first and second hybrid connector outputs.
摘要翻译： 提供多频GNSS天线，可以使用PCB材料制造，并具有良好的多路径抑制能力。 天线能够在宽波束宽度上接收所有可视GNSS卫星的RHCP信号。 多频GNSS天线制造方法包括以下步骤：提供PCB基座和支撑组件，第一和第二馈电网络，并将所述第一和第二馈电网络连接到第一和第二混合连接器输出端。
-
公开(公告)号：US20120186073A1
公开(公告)日：2012-07-26
申请号：US13187305
申请日：2011-07-20
申请人： Walter J. Feller , Xiaoping Wen
发明人： Walter J. Feller , Xiaoping Wen
IPC分类号： H01P11/00
CPC分类号： H01Q1/38 , H01Q5/371 , H01Q9/28 , H01Q11/083 , Y10T29/49002 , Y10T29/49016 , Y10T29/4913
摘要： A multi-frequency GNSS antenna is provided which can be manufactured from PCB materials and exhibits good multipath rejection. The antenna is capable of receiving RHCP signals from all visible GNSS satellites across a wide beamwidth. A multi-frequency GNSS antenna manufacturing method includes the steps of providing PCB base and support assemblies, first and second feed networks and connecting said first and second feed networks to first and second hybrid connector outputs.
摘要翻译： 提供多频GNSS天线，可以使用PCB材料制造，并具有良好的多路径抑制能力。 天线能够在宽波束宽度上接收所有可视GNSS卫星的RHCP信号。 多频GNSS天线制造方法包括以下步骤：提供PCB基座和支撑组件，第一和第二馈电网络，并将所述第一和第二馈电网络连接到第一和第二混合连接器输出端。
-
-
-
-
-
-
-
-
-
搜索结果
40 条记录 (耗时 0.021 秒)
