公开(公告)号：US10732294B1

公开(公告)日：2020-08-04

申请号：US15368928

申请日：2016-12-05

Applicant: Northrop Grumman Systems Corporation

Inventor： Dennis M. Hall ,  Kiet D. Ngo ,  Marlon E. Marquez

IPC: G01S19/36

Abstract: A system for generating a frequency hopping Global Positioning System (GPS) system includes: an on-orbit reprogrammable digital waveform generator (ORDWG) configured to generate a GPS signal comprising a resilient frequency-hopping spread spectrum GPS signal that hops at a hop rate between two or more GPS channels, the GPS signal further comprising a legacy direct-sequence spread spectrum signal for at least two of the two or more GPS channels; and a receiver configured to receive the GPS signal, the radio further configured to decode the GPS signal.

公开(公告)号：US20150364819A1

公开(公告)日：2015-12-17

申请号：US14302663

申请日：2014-06-12

Applicant: Northrop Grumman Systems Corporation

Inventor： Kiet D. Ngo ,  Edward V. Koretzky ,  Dennis M. Hall ,  Douglas S. Cockfield

IPC: H01Q3/30

CPC classification number: G01S19/02 ,  G01S1/042 ,  H01Q3/30 ,  H01Q21/0093

Abstract: An apparatus includes: a Global Positioning System (GPS) phased array comprising a plurality of digital beam forming elements (DBFEs), wherein at least one of the DBFEs includes: an antenna configured to transmit a GPS signal; a radio frequency (RF) electronics section operably connected to the antenna and digital electronics sections; and a digital electronics section operably connected to the RF electronics section. An apparatus includes: a GPS phased array comprising a plurality of DBFEs, wherein at least one of the DBFEs includes: an antenna configured to transmit a GPS signal; an RF electronics section operably connected to the antenna and digital electronics sections; and a digital electronics section operably connected an RF electronic section; a navigation encoder and frequency generator (NEFU) unit operably connected to the GPS phased array; and an atomic frequency standard operably connected to the NEFU unit.

Abstract translation: 一种装置包括：包括多个数字波束形成元件（DBFE）的全球定位系统（GPS）相控阵列，其中所述DBFE中的至少一个包括：被配置为发送GPS信号的天线; 可操作地连接到天线和数字电子部分的射频（RF）电子部分; 以及可操作地连接到RF电子部分的数字电子部件。 一种装置包括：包括多个DBFE的GPS相控阵列，其中所述DBFE中的至少一个包括：被配置为发送GPS信号的天线; 可操作地连接到天线和数字电子部分的RF电子部分; 以及可操作地连接RF电子部分的数字电子部分; 可操作地连接到GPS相控阵列的导航编码器和频率发生器（NEFU）单元; 以及可操作地连接到NEFU单元的原子频率标准。

公开(公告)号：US11041961B1

公开(公告)日：2021-06-22

申请号：US16899011

申请日：2020-06-11

Applicant: Northrop Grumman Systems Corporation

Inventor： Dennis M. Hall ,  Kiet D. Ngo ,  Marlon E. Marquez

IPC: G01S19/36

Abstract: A frequency hopping Global Positioning System (GPS) system comprises an on-orbit reprogrammable digital waveform generator configured to generate a GPS signal comprising a resilient frequency-hopping spread spectrum GPS signal that hops at a hop rate between two or more GPS channels. The GPS signal further comprises a legacy direct-sequence spread spectrum signal for at least two of the two or more GPS channels. Further, a receiver is configured to receive the GPS signal, wherein the receiver is further configured to decode the GPS signal.

公开(公告)号：US09973984B1

公开(公告)日：2018-05-15

申请号：US15260393

申请日：2016-09-09

Applicant: Northrop Grumman Systems Corporation

Inventor： Dennis M. Hall ,  Hau H. Ho ,  Kiet D. Ngo

IPC: H04W4/00 ,  H04W36/00 ,  H04W16/28 ,  H04W84/06

CPC classification number: H04W36/0072 ,  H04W16/28 ,  H04W84/06

Abstract: An exemplary satellite in a communication system supports communications among earth stations and has a first receiver that receiving a first RF signal transmitted from a first earth station that is down converted to a first electrical IF signal. An up converter converts a second electrical IF signal, from a second earth station carrying information for the first earth station, to a second RF signal and transmits it to the first earth station. A switch switches remotely reconfigurable electrical IF communication circuits between pairs of ports. Signals carrying information to be communicated between the first and second earth stations are linked together by the switch.

公开(公告)号：US09921313B2

公开(公告)日：2018-03-20

申请号：US14302663

申请日：2014-06-12

Applicant: Northrop Grumman Systems Corporation

Inventor： Kiet D. Ngo ,  Edward V. Koretzky ,  Dennis M. Hall ,  Douglas S. Cockfield

IPC: G01S19/02 ,  H01Q3/30 ,  H01Q21/00 ,  G01S1/04

CPC classification number: G01S19/02 ,  G01S1/042 ,  H01Q3/30 ,  H01Q21/0093

Abstract: An apparatus includes: a Global Positioning System (GPS) phased array comprising a plurality of digital beam forming elements (DBFEs), wherein at least one of the DBFEs includes: an antenna configured to transmit a GPS signal; a radio frequency (RF) electronics section operably connected to the antenna and digital electronics sections; and a digital electronics section operably connected to the RF electronics section. An apparatus includes: a GPS phased array comprising a plurality of DBFEs, wherein at least one of the DBFEs includes: an antenna configured to transmit a GPS signal; an RF electronics section operably connected to the antenna and digital electronics sections; and a digital electronics section operably connected an RF electronic section; a navigation encoder and frequency generator (NEFU) unit operably connected to the GPS phased array; and an atomic frequency standard operably connected to the NEFU unit.