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1.发明授权公开(公告)号：US09503294B1
公开(公告)日：2016-11-22
申请号：US15182452
申请日：2016-06-14
Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
Inventor： Marlon E. Marquez , Douglas S. Cockfield , Gerald R. Fischer , Matthew M. D'Amore
CPC classification number: H04L27/0008 , H03F1/02 , H03F3/24 , H04B1/0475 , H04B1/7172 , H04B2001/045 , H04L27/3405 , H04L27/368
Abstract: An amplitude and phase modulation circuit for modulating an M-ary digital signal having pulses onto a carrier wave for transmission by direct digital synthesis. The modulation circuit includes a digital source that generates a digital signal including pulses representing logical 1s and no pulses representing logical zeros, where a group of M pulses represents a constellation point to be transmitted. The modulation circuit further includes a phase control circuit that provides phase control and an amplitude control circuit that provides pulse width control for the constellation point to be transmitted. A saturated amplifier amplifies the phase and amplitude controlled digital signal and a filter integrates and averages the digital signal to remove noise from the signal so as to convert the digital signal to an analog signal, where the digital source operates to reduce the amplifier power consumption requirements.
Abstract translation: 一种幅度和相位调制电路，用于通过直接数字合成将具有脉冲的M数字信号调制到载波上以进行传输。 调制电路包括产生数字信号的数字源，该数字信号包括表示逻辑1的脉冲，无脉冲表示逻辑零，其中一组M个脉冲表示要发射的星座点。 调制电路还包括提供相位控制的相位控制电路和为要发送的星座点提供脉冲宽度控制的幅度控制电路。 饱和放大器放大相位和幅度受控的数字信号，并且滤波器对数字信号进行积分和平均以去除信号中的噪声，以将数字信号转换为模拟信号，其中数字源工作以降低放大器功耗要求 。
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2.发明申请GLOBAL POSITIONING SYSTEM PHASED ARRAY USING ALL-DIGITAL BEAM FORMING AND DIRECT DIGITAL WAVEFORM SYNTHESIS METHODS 有权使用全数字波束形成和直接数字波形合成方法的全球定位系统相位阵列公开(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。
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公开(公告)号：US10284358B1
公开(公告)日：2019-05-07
申请号：US15468198
申请日：2017-03-24
Applicant: Northrop Grumman Systems Corporation
Inventor： Cyrus Dhalla , Jonathan Krauss , Scott M. Takahashi , Gerald R. Fischer , Douglas S. Cockfield , Akop Gazdzhyan
Abstract: An embodiment generates a composite high speed clock with embedded frame synchronization using simple digital encoding of a high speed reference clock. The high speed reference clock and self-aligned frame synchronization signal are recovered by standard logic gate circuitry. The encoding and decoding circuits are comprised of basic digital logic gates with low propagation delay skew and timing jitter. The encoded clock is easier to transmit from source unit to destination unit over common transmission media (i.e., digital transceivers, amplifiers, splitters, connectors and coaxial cable) because only a single interface is required and because the encoding scheme reduces the composite clock to a minimal transmission bandwidth with constrained waveform harmonic content, relative to a low frequency frame sync with fast rise time that requires a broadband transmission media.
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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
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.
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