公开(公告)号：US20200166629A1

公开(公告)日：2020-05-28

申请号：US16749594

申请日：2020-01-22

申请人： L-3 Communications Corp.

发明人： Sy Prestwich ,  Jeffrey B. Bench ,  Richard A. McNamee

IPC分类号： G01S13/68 ,  G01S13/44

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：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：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：US09100143B1

公开(公告)日：2015-08-04

申请号：US14155648

申请日：2014-01-15

申请人： L-3 Communications Corp.

发明人： Kim J. Olszewski ,  Joshua D. Gunn

IPC分类号： H04L1/00

CPC分类号： H04L25/03019 ,  H04L2025/03726

摘要： A multi-mode parameter adaptation module can comprise different modes for generating parameters to minimize an error between an output of an adaptive processor and an ideal output of the adaptive processor. A mode control module can monitor a performance signal p indicative of an operating condition a receiver of which the adaptive processor is a part. Upon detecting a change condition form the performance signal p, the mode control module can change the operating mode of the parameter adaptation module to suit the current operating condition.

摘要翻译： 多模式参数适配模块可以包括用于产生参数以使自适应处理器的输出与自适应处理器的理想输出之间的误差最小化的不同模式。 模式控制模块可以监视表示自适应处理器是其一部分的接收机的操作条件的性能信号p。 在从性能信号p检测到改变状态时，模式控制模块可以改变参数适配模块的操作模式以适应当前操作状态。