公开(公告)号：US10324176B1

公开(公告)日：2019-06-18

申请号：US15420427

申请日：2017-01-31

申请人： L-3 Communications Corp.

发明人： Jeffrey B Bench ,  Sy Prestwich ,  Michael B Hollenbeck

IPC分类号： G01S13/44 ,  G01S13/66

摘要： A mainlobe detection process can include a number of tests that are performed to define when the monopulse antenna system will transition from open loop scanning to closed loop scanning and then to tracking. A hybrid tracking technique is also provided which adaptively discovers and corrects for phase alignment error. Magnitude-only tracking can be performed initially to locate the nulls in the azimuth and elevation ratios and to identify the magnitudes of these ratios at these nulls. Phase tracking can be then performed. During phase tracking, phase corrections can be repeatedly applied to the azimuth and elevation difference channels to correct any phase error that may exist. During this process, the magnitudes of the ratios can be used to determine how the phase corrections should be adjusted. Once the hybrid tracking process is complete, the monopulse antenna system is properly phase-aligned and phase tracking will be correctly employed.

公开(公告)号：US10263728B1

公开(公告)日：2019-04-16

申请号：US14223369

申请日：2014-03-24

申请人： L-3 Communications Corp.

发明人： Janez Jeraj ,  Osama S. Haddadin

IPC分类号： H04K3/00 ,  H04B1/04 ,  H04B1/10

摘要： A transmit signal can be distorted with non-linear distortion, and one or more characteristics of the non-linear distortion can be periodically changed in accordance with a change key. The transmission received at a receiver can thus comprise a severely distorted version of the transmission of the transmit signal. A receiver with the same change key can recognize and decode the transmission, but it can be extraordinarily difficult for receivers that lack the change key to detect and decode the transmission. The transmission can be a communications while jamming (CWJ) transmission. The CWJ transmission can contain a coded message that can be decoded only by friendly RF receivers, and the CWJ transmission can also jam unfriendly RF receivers that lack a change key for decoding the coded message.

公开(公告)号：US10170833B1

公开(公告)日：2019-01-01

申请号：US14578101

申请日：2014-12-19

申请人： L-3 Communications Corp.

发明人： Michael C. Hollenbeck ,  Jonathan C. Landon ,  Rory K. Sorensen

IPC分类号： H01Q3/34

摘要： A transmitter or receiver can include a phased array antenna system in which multiple characteristics of a transmitted or received beam can be controlled electronically. For example, in embodiments that include a transmitter, dual outputs of N signal modifiers can be connected to orthogonal inputs of N dual-orthogonally polarized antenna elements. Each signal modifier can modify the amplitude and phase of a communications signal in two parallel signal paths to produce two signal components each of which is an amplitude-modified/phase-shifted version of the communication signal. Multiple characteristics of the combined beam can be simultaneously controlled by setting the amplitude and/or phase-shift parameter values in the dual signal paths in the signal modifiers to combined values that individually affect each of the multiple characteristics of the combined beam.

公开(公告)号：US09634399B1

公开(公告)日：2017-04-25

申请号：US14077433

申请日：2013-11-12

申请人： L-3 Communications Corp.

发明人： Johnny M. Harris ,  Osama S. Haddadin ,  Zachary C. Bagley ,  Brandon G. Walsh ,  Jonathan C. Landon

IPC分类号： H01Q15/14 ,  H01Q19/10

CPC分类号： H01Q19/13

摘要： An antenna system can impart orbital angular momentum (OAM) to an incident electromagnetic (EM) signal from a feed antenna. The antenna system can include a partial OAM antenna with a reflective surface that has only part of a full OAM shaped surface. The antenna system can thus reflect the incident EM signal as a partial OAM beam rather than a full OAM beam.

公开(公告)号：US09445137B2

公开(公告)日：2016-09-13

申请号：US13363366

申请日：2012-01-31

申请人： W. Kyle Unice

发明人： W. Kyle Unice

IPC分类号： H04N5/225 ,  H04N7/26 ,  H04N21/238 ,  H04N21/234 ,  H04L29/06 ,  H04N19/61 ,  H04N19/895

CPC分类号： H04N21/238 ,  H04L65/604 ,  H04L65/80 ,  H04N19/61 ,  H04N19/895 ,  H04N21/23418

摘要： A method for conditioning a network based encoded video stream including receiving the video stream over an RF data link, detecting any missing and/or corrupted data within the data stream, and inserting curative data in place of the missing or corrupted data. A system and method for transmitting a real-time video stream to an end-user at least partially over an RF data link including the video conditioner wherein a camera obtains video footage, an encoder to compresses the video stream, an RF transmitter transmits the encoded video stream over an RF data link, and an RF receiver to receives the encoded video stream from the RF transmitter. The video stream is conditioned by the video conditioner and routed to an end user through a computer network wherein a decoder decodes the encoded video stream and the video stream is viewed on a display.

摘要翻译： 一种用于调节基于网络的编码视频流的方法，包括通过RF数据链路接收视频流，检测数据流内的任何丢失和/或损坏的数据，以及插入治愈数据代替丢失或损坏的数据。 一种用于至少部分地通过包括摄像机获得视频镜头的视频调节器的RF数据链路至少部分地向终端用户发送实时视频流的系统和方法，用于压缩视频流的编码器，RF发射机发送编码的 通过RF数据链路的视频流，以及RF接收器，用于从RF发射器接收编码的视频流。 视频流由视频调节器调节并通过计算机网络路由到最终用户，其中解码器解码编码的视频流，并且在显示器上观看视频流。

公开(公告)号：US09374107B1

公开(公告)日：2016-06-21

申请号：US14278749

申请日：2014-05-15

申请人： L-3 COMMUNICATIONS CORP.

发明人： Ryan W. Hinton ,  Joshua D. Gunn

IPC分类号： H03M13/11

CPC分类号： H03M13/114

摘要： An LDPC decoder includes a check node processor. The check node processor is configured to implement an n-degree check node, where n is a predetermined number. The degree of a check node is the number of edges coupled to the check node. The LDPC decoder also includes a plurality of n time division multiplexers coupled to the check node processor to couple different edge connection input values to the check node processor at different times so as to allow the check node processor to be time division multiplexed for use in implementing different check nodes with the same check node processor. Each of the multiplexers is configured to provide no more than one edge connection input value to the check node processor at any given time. Each edge connection is used to implement an edge into a check node.

摘要翻译： LDPC解码器包括校验节点处理器。 校验节点处理器被配置为实现n度校验节点，其中n是预定数目。 校验节点的程度是耦合到校验节点的边的数量。 LDPC解码器还包括耦合到校验节点处理器的多个n个时分多路复用器，以在不同时间将不同的边缘连接输入值耦合到校验节点处理器，以允许校验节点处理器被时分复用以用于实现 不同的校验节点具有相同的校验节点处理器。 每个多路复用器被配置为在任何给定时间向校验节点处理器提供不超过一个边缘连接输入值。 每个边缘连接用于将边缘实现到校验节点中。

公开(公告)号：US09350084B1

公开(公告)日：2016-05-24

申请号：US14077493

申请日：2013-11-12

申请人： L-3 Communications Corp.

发明人： Johnny M. Harris ,  Osama S. Haddadin ,  Zachary C. Bagley ,  Brandon G. Walsh ,  Jonathan C. Landon

IPC分类号： H04L5/04 ,  H01Q19/10 ,  H01Q19/06 ,  H01Q3/14 ,  H01Q3/20

CPC分类号： H01Q19/10 ,  H01Q3/14 ,  H01Q3/20 ,  H01Q19/06

摘要： Electromagnetic (EM) feeds can illuminate a standard primary reflective antenna with a plurality of feed beams each having a different orbital angular momentum (OAM) or polarization. The reflective antenna, which can be a non-OAM antenna, can reflect the feed beams and thereby produce a composite OAM transmission comprising each of the feed beams. A non-OAM primary antenna can thus transmit a plurality of OAM feed beams as a composite OAM transmission.

摘要翻译： 电磁（EM）馈电可以用多个具有不同轨道角动量（OAM）或极化的馈送光束来照亮标准主反射天线。 可以是非OAM天线的反射天线可以反射进给光束，从而产生包括每个馈送光束的复合OAM传输。 因此，非OAM主天线可以作为复合OAM传输传输多个OAM馈送波束。

公开(公告)号：US09253925B1

公开(公告)日：2016-02-02

申请号：US13739995

申请日：2013-01-11

申请人： L-3 Communications Corp.

发明人： Robert H. Smith

IPC分类号： H05K7/20 ,  H02B1/01

CPC分类号： H05K7/20409 ,  H01L23/367 ,  H01L23/3675 ,  H01L23/42 ,  H01L24/01 ,  H01L2224/32225 ,  H05K1/0209 ,  H05K7/20509 ,  H05K2201/066

摘要： An electronic assembly can include a support structure, a circuit substrate coupled to a first portion of the support structure, and a composite material panel coupled to a second portion of the support structure. An electronic device can be coupled to a mounting surface of the circuit substrate and disposed within a space enclosed by walls of the support structure. The panel can include contiguous sections inner surfaces of which can be oriented within twenty-five degrees of parallel to said mounting surface. Each section can be significantly more thermally conductive generally parallel to the inner surface of the section than generally perpendicular to the inner surface.

摘要翻译： 电子组件可以包括支撑结构，耦合到支撑结构的第一部分的电路基板以及耦合到支撑结构的第二部分的复合材料板。 电子设备可以耦合到电路基板的安装表面并且设置在由支撑结构的壁围绕的空间内。 面板可以包括连续部分，其内表面可以定向在平行于所述安装表面的二十五度内。 每个部分通常可大致平行于该部分的内表面导热，而不是大致垂直于内表面。

公开(公告)号：US09130689B1

公开(公告)日：2015-09-08

申请号：US13900765

申请日：2013-05-23

申请人： L-3 Communications Corp.

发明人： Thomas R. Giallorenzi ,  Radivoje Zarubica ,  Samuel C. Kingston ,  Matthew A. Lake ,  David M. Arnesen ,  N. Thomas Nelson

IPC分类号： H04B7/216 ,  H04J13/00

CPC分类号： H04J13/0003

摘要： The present invention is generally directed to using code division multiplexing (CDM) on the beacon and traffic channels while lowering the power of the beacon channel so that it rides under the traffic channel and becomes very difficult to detect. In this way, the beacon channel can contain sensitive information for decoding the traffic channel while remaining hidden from unintended recipients. By hiding the beacon channel, the CDM technique can be particularly beneficial in adaptive waveform systems where sensitive traffic channel acquisition information is regularly transmitted to the receiver.

摘要翻译： 本发明一般涉及在信标和业务信道上使用码分复用（CDM），同时降低信标信道的功率，使得它在业务信道下方变得非常难以检测。 以这种方式，信标信道可以包含用于解码业务信道的敏感信息，同时保持对非预期接收者的隐藏。 通过隐藏信标信道，CDM技术在将敏感业务信道获取信息定期发送到接收机的自适应波形系统中特别有利。

公开(公告)号：US09112255B1

公开(公告)日：2015-08-18

申请号：US13419108

申请日：2012-03-13

申请人： Michael C. Hollenbeck ,  Douglas H. Ulmer ,  Troy M. Rueckert ,  Neil K. Harker

发明人： Michael C. Hollenbeck ,  Douglas H. Ulmer ,  Troy M. Rueckert ,  Neil K. Harker

IPC分类号： H01P3/12 ,  H01P5/20 ,  H01P1/208 ,  H01P5/18

CPC分类号： H01P5/182

摘要： A phase shifting component of a waveguide comparator subsystem can effect a relative phase shift that advances an input signal A relative to an input signal B. A comparator component can then split those signals such that a first part of signal A and a second part of signal B are combined at a difference port, and a first part of signal B and a second part of signal A are combined at a sum port. The comparator can delay the phase of the second parts of the signals such that, with the relative phase shift of the phase shifting component, the first part of signal A and the second part of signal B are one-hundred eighty degrees (180°) out of phase at the difference port, and the second part of signal A and the first part of signal B are in phase at the sum port.

摘要翻译： 波导比较器子系统的相移分量可以影响相对于输入信号B使输入信号A前进的相对相移。然后，比较器部件可以分离这些信号，使得信号A的第一部分和信号的第二部分 B在差分端口组合，信号B的第一部分和信号A的第二部分在和口端口组合。 比较器可以延迟信号的第二部分的相位，使得通过相移分量的相对相移，信号A的第一部分和信号B的第二部分是180度（180度） 在差分端口处于异相，信号A的第二部分和信号B的第一部分在和口端口处于同相。