公开(公告)号：US20190123439A1

公开(公告)日：2019-04-25

申请号：US15787884

申请日：2017-10-19

申请人： Daniel Katz

发明人： Daniel Katz

IPC分类号： H01Q3/08 ,  H01Q21/24

CPC分类号： H01Q3/08 ,  G01S3/02 ,  G01S5/02 ,  G01S5/0221 ,  G01S19/17 ,  G01S19/36 ,  G04R60/06 ,  H01Q1/273 ,  H01Q7/00 ,  H01Q21/24

摘要： The present invention discloses an extendable antenna for a portable communication device, made of two radiating wires each shaped as an open loop; a first loop fixed and a second loop movable between two positions: in parallel or alternatively vertically to the first loop; the parallel position suitable for compactly carrying the device in non-active mode, and the vertical combination configured to produce a substantially isotropic radiation pattern, particularly instrumental for satellite communications. According to one embodiment, this device is a satellite served Personal Locator Beacon (PLB) for Search and Rescue (SAR) of people in distress, configured to be wrist worn.

公开(公告)号：US20180270821A1

公开(公告)日：2018-09-20

申请号：US15706295

申请日：2017-09-15

申请人： Cognitive Systems Corp.

发明人： Dustin Griesdorf ,  Stephen Arnold Devison ,  Mohammad Omer ,  Yunfeng Piao ,  Oleksiy Kravets ,  Tajinder Manku ,  Christopher Vytautas Olekas

IPC分类号： H04W72/04 ,  H04B17/309

CPC分类号： H04W72/0453 ,  G01P13/00 ,  G01S1/02 ,  G01S3/02 ,  H04B17/309 ,  H04W64/00

摘要： In a general aspect, a wireless communication channel is selected based on signal quality metrics. In some aspects, a first wireless communication device receives a first set of signals based on wireless signals transmitted through a space on a set of wireless communication channels from a second wireless communication device. A signal quality metric value is computed for each wireless communication channel based on the first set of signals, and one of the wireless communication channels is selected based on a comparison of the signal quality metric values for the respective wireless communication channels. The first wireless communication device receives a second set of signals based on wireless signals transmitted through the space on the selected wireless communication channel from the second wireless communication device, and a motion detection process is executed to detect motion of an object in the space based on the second set of signals.

公开(公告)号：US10073161B2

公开(公告)日：2018-09-11

申请号：US14818658

申请日：2015-08-05

申请人： RAYTHEON COMPANY

发明人： Harry Marr ,  Jeffrey Caldwell ,  Ian S. Robinson

IPC分类号： G01R23/00 ,  G01S7/292 ,  G01S3/02 ,  G01S7/02 ,  G01S7/28 ,  G01R23/15

CPC分类号： G01S3/02 ,  G01R23/15 ,  G01S5/02 ,  G01S5/0205 ,  G01S7/021 ,  G01S7/28 ,  G01S7/292

摘要： Method and apparatus for tracking pulse trains from one or more emitters. For a valid pulse, PRI parameters are measured. A pulse pattern count is incremented and checked to determine if a track is acquired for the emitter.

公开(公告)号：US10061018B1

公开(公告)日：2018-08-28

申请号：US15048911

申请日：2016-02-19

申请人： Zain Naboulsi

发明人： Zain Naboulsi

IPC分类号： G01S7/41 ,  G01S13/02 ,  G01S13/86

CPC分类号： G01S3/02 ,  G01S3/78 ,  G01S7/021 ,  G01S7/4804 ,  G01S13/04 ,  G01S17/026

摘要： A system for identifying a drone is adapted to determine a base threat value for a drone. The system includes a scanning system, configured to obtain data that is stored in a pattern database. A timer that has a data structure for storing a counter initialized to a predetermined value, the timer being operable to iteratively increment the counter if the counter value is less than a timer increment. A microprocessor is programmed with instructions to receive information from the scanning system about the drone. Then, to store the information in a pattern database. After that, to determine a base threat value of the drone based on the information stored in the pattern database. Finally, to communicate the base threat value to a user so that the user can determine whether the drone is a friend or a foe.

公开(公告)号：US09709662B2

公开(公告)日：2017-07-18

申请号：US14461579

申请日：2014-08-18

申请人： The Boeing Company

发明人： James Bryan Baker ,  Gary Alan Ray

IPC分类号： G01S13/00 ,  G01S5/02 ,  G01S3/02

CPC分类号： G01S5/0273 ,  G01S3/02 ,  G01S13/003

摘要： A bistatic radar system may include a transmitter, a target at a first known position, a receiver at a second known position, and a transmitter position determination unit. The receiver is configured to receive one or more reflected radar signals transmitted from the transmitter and reflected off the target. The receiver is configured to receive one or more direct radar signals transmitted from the transmitter. The transmitter position determination unit is configured to determine a position of the transmitter based on a determination of a distance between the first and second known positions and a determination of a first angular difference between the reflected radar signal(s) and the direct radar signal(s) that are received by the receiver.

公开(公告)号：US20170038465A1

公开(公告)日：2017-02-09

申请号：US14818658

申请日：2015-08-05

申请人： RAYTHEON COMPANY

发明人： Harry Marr ,  Jeffrey Caldwell ,  Ian S. Robinson

IPC分类号： G01S13/70

CPC分类号： G01S3/02 ,  G01R23/15 ,  G01S5/02 ,  G01S5/0205 ,  G01S7/021 ,  G01S7/28 ,  G01S7/292

摘要： Method and apparatus for tracking pulse trains from one or more emitters. For a valid pulse. PRI parameters are measured. A pulse pattern count is incremented and checked to determine if a track is acquired for the emitter.

摘要翻译： 用于跟踪来自一个或多个发射器的脉冲串的方法和装置。 对于有效的脉冲。 测量PRI参数。 增加脉冲模式计数并检查以确定是否为发射器获取轨道。

公开(公告)号：US20150220488A1

公开(公告)日：2015-08-06

申请号：US14615238

申请日：2015-02-05

申请人： Liam M. Healy

发明人： Liam M. Healy

IPC分类号： G06F17/18 ,  G01S13/84

CPC分类号： G06F17/18 ,  G01S3/02 ,  G01S5/0278 ,  G01S13/003 ,  G01S13/42 ,  G01S13/84 ,  G01S13/878 ,  G01S19/43 ,  G01S19/44 ,  G01S19/54 ,  G01S19/55

摘要： A radio-frequency interferometry method for determining parameters of motion of a moving object from phase difference information from an antenna baseline formed of two antennas. At each of a plurality of observation events, compute a posterior probability density function from the phase differences from the baseline, separate the modes with a threshold value of probability density, and compute a probability of each mode. For each possible sequence of modes, determine a mode sequence probability as the product of the probabilities of each mode in that sequence, estimate a χ2 goodness of fit function based on an assumed type of motion. Determine the net probability of each possible sequence of modes as the product of a relative probability derived from the χ2 and the mode sequence probability. Alternately, two or more parallel or colinear baselines are used, and the posterior PDF is a combined PDF over each of the baselines.

摘要翻译： 一种用于从由两个天线形成的天线基线的相位差信息确定移动物体的运动参数的射频干涉测量方法。 在多个观察事件中的每个观察事件中，根据与基线的相位差计算后验概率密度函数，以模式与概率密度的阈值进行分离，并计算各模式的概率。 对于每个可能的模式序列，确定模式序列概率作为该序列中每个模式的概率的乘积，基于假定的运动类型来估计拟合函数的χ2优良度。 确定每个可能的模式序列的净概率作为从χ2导出的相对概率与模式序列概率的乘积。 或者，使用两个或更多个平行或共线基线，并且后面的PDF是每个基线上的组合PDF。

公开(公告)号：US08744800B1

公开(公告)日：2014-06-03

申请号：US13239819

申请日：2011-09-22

申请人： Mark Billsberry

发明人： Mark Billsberry

IPC分类号： G01C23/00 ,  G01S5/02 ,  G01S11/02 ,  G01S1/30 ,  G01S3/02

CPC分类号： G01S5/02 ,  G01S1/30 ,  G01S3/02 ,  G01S11/02 ,  G01S13/785

摘要： A distance measuring, device including a lookup table storing values to calibrate a Class AB amplifier to produce a pulse pair with the desired characteristics. The distance measuring device analyzes the characteristics of the output signal and recursively adapts the values stored in a lookup table to force the output the power amplifier to meet the required performance characteristics.

摘要翻译： 距离测量装置，包括查找表，其存储用于校准AB类放大器以产生具有期望特性的脉冲对的值。 距离测量装置分析输出信号的特性，并递归地适应存储在查找表中的值，以迫使功率放大器的输出满足所需的性能特征。

公开(公告)号：US20110187600A1

公开(公告)日：2011-08-04

申请号：US12840587

申请日：2010-07-21

申请人： Jeremy A. Landt

发明人： Jeremy A. Landt

IPC分类号： G01S3/02

CPC分类号： G01S3/02

摘要： Distance to a modulated backscatter tag is measured with a RFID reader that measures changes in phase with frequency of modulated backscattered RF signals. Measured distances are linked to a specific tag. The effects of other sources of reflected and interfering signals are mitigated. The techniques eliminate the need for high RF bandwidth used in time-of-flight methods, and may be used with linear, limiting or other types of amplifiers in the reader receiver. Unambiguous distance to a tag may be found using the derivative of phase with RF frequency of the modulated signal backscattered by a tag. The distance to a tag can be measured with an accuracy on the order of a centimeter. The techniques utilize the characteristics of cooperative backscatter tags (transponders, labels, etc.). New readers implement the techniques which may use unmodified tags.

摘要翻译： 使用RFID读取器测量到调制反向散射标签的距离，RFID读取器测量调制后向散射RF信号的频率的相位变化。 测量距离与特定标签相关联。 反映和干扰信号的其他来源的影响得到缓解。 该技术消除了在飞行时间方法中使用的高RF带宽的需要，并且可以与读取器接收器中的线性，限制或其他类型的放大器一起使用。 可以使用由标签反向散射的调制信号的RF频率的相位导数来找到与标签的明确距离。 与标签的距离可以以一厘米的数量级的精度进行测量。 该技术利用了协作反向散射标签（转发器，标签等）的特性。 新读者实现可能使用未修改标签的技术。

公开(公告)号：US20070287395A1

公开(公告)日：2007-12-13

申请号：US11201164

申请日：2005-08-11

申请人： Lars Karlsson

发明人： Lars Karlsson

IPC分类号： H04B17/02 ,  H04B7/08 ,  H04B1/06

CPC分类号： G01S3/02 ,  H04B17/27

摘要： Systems and methods of collecting intelligence provide an intelligence system having a front-end, a post-processing stage and a direction-finding stage. The front-end may generate digital data based on received RF signals, where the post-processing stage may process the digital data. The direction finding stage is able to prevent the post-processing stage from processing portions of the digital data that correspond to RF signals arriving from a direction other than a pre-determined direction. In one embodiment, the front end collects the RF signals in a plurality of parallel channels.

摘要翻译： 收集情报的系统和方法提供了具有前端，后处理阶段和测向阶段的情报系统。 前端可以基于接收到的RF信号生成数字数据，其中后处理阶段可以处理数字数据。 方向发现级能够防止后处理级处理对应于从除预定方向以外的方向到达的RF信号的数字数据的部分。 在一个实施例中，前端在多个并行通道中收集RF信号。