[go: up one dir, main page]

TW327262B - Wideband vector modulator - Google Patents

Wideband vector modulator

Info

Publication number
TW327262B
TW327262B TW084111349A TW84111349A TW327262B TW 327262 B TW327262 B TW 327262B TW 084111349 A TW084111349 A TW 084111349A TW 84111349 A TW84111349 A TW 84111349A TW 327262 B TW327262 B TW 327262B
Authority
TW
Taiwan
Prior art keywords
modulator
qpsk
digital input
phase
output signal
Prior art date
Application number
TW084111349A
Other languages
English (en)
Inventor
Halloran Timothy
Original Assignee
Loral Aerospace Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Loral Aerospace Corp filed Critical Loral Aerospace Corp
Application granted granted Critical
Publication of TW327262B publication Critical patent/TW327262B/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
TW084111349A 1994-07-15 1995-10-27 Wideband vector modulator TW327262B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/275,604 US5463355A (en) 1994-07-15 1994-07-15 Wideband vector modulator which combines outputs of a plurality of QPSK modulators

Publications (1)

Publication Number Publication Date
TW327262B true TW327262B (en) 1998-02-21

Family

ID=23053064

Family Applications (1)

Application Number Title Priority Date Filing Date
TW084111349A TW327262B (en) 1994-07-15 1995-10-27 Wideband vector modulator

Country Status (2)

Country Link
US (1) US5463355A (zh)
TW (1) TW327262B (zh)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638401A (en) * 1995-01-31 1997-06-10 Ericsson Inc. Method and apparatus for generating plural quadrature modulated carriers
US5668842A (en) * 1995-02-28 1997-09-16 Hughes Aircraft Company High-speed digital-to-RF-converter
EP0768782A1 (en) * 1995-10-16 1997-04-16 Loral Aerospace Corporation Wide-band microwave vector modulator
US5612651A (en) * 1996-01-02 1997-03-18 Loral Aerospace Corp. Modulating array QAM transmitter
US6094415A (en) * 1996-06-20 2000-07-25 Lockheed Martin Corporation Vector division multiple access communication system
FR2760301B1 (fr) * 1997-02-28 1999-04-30 Centre Nat Etd Spatiales Circuit electronique modulateur par deplacement de phase a structure distribuee
US5867071A (en) * 1997-08-15 1999-02-02 Lockheed Martin Aerospace Corp. High power transmitter employing a high power QAM modulator
US6674811B1 (en) * 2000-06-14 2004-01-06 Northrop Grumman Corporation Efficient pre-distorted 12/4 QAM modulator
FR2811826B1 (fr) * 2000-07-13 2002-10-11 Centre Nat Etd Spatiales Procede et circuit de modulation numerique a composantes du signal de sortie module pouvant etre nulles
US6417712B1 (en) 2000-09-27 2002-07-09 Nortel Networks Limited Phase shifter using sine and cosine weighting functions
US6593827B2 (en) * 2001-11-16 2003-07-15 Lockheed Martin Corporation Modulating array transmitter autocalibration method and system
US6806789B2 (en) * 2002-01-22 2004-10-19 M/A-Com Corporation Quadrature hybrid and improved vector modulator in a chip scale package using same
US7003058B2 (en) * 2002-02-27 2006-02-21 The Boeing Company Polarization division duplexing with cross polarization interference canceller
US7680213B2 (en) * 2004-04-14 2010-03-16 Nokia Corporation Generating higher order modulation using QPSK modulations
EP2478585B1 (en) 2009-09-15 2013-05-29 Mehmet Unlu Simultaneous phase and amplitude control using triple stub topology and its implementation using rf mems technology
EP3188307B1 (en) 2015-12-29 2024-12-18 Synergy Microwave Corporation High performance switch for microwave mems
EP3422464B1 (en) 2015-12-29 2021-02-24 Synergy Microwave Corporation Microwave mems phase shifter
EP3373387B1 (en) 2017-03-10 2023-09-06 Synergy Microwave Corporation Microelectromechanical switch with metamaterial contacts
CN108399292B (zh) * 2018-02-12 2021-08-31 中天宽带技术有限公司 一种宽频移相器功率分配电路结构设计方法
WO2020028409A1 (en) * 2018-07-30 2020-02-06 The Regents Of The University Of California Transmitter architecture for generating 4n-qam constellation with no digital-to-analog converters (dac) in signal path requirement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168397A (en) * 1978-05-26 1979-09-18 Gte Automatic Electric Laboratories Incorporated 8-Phase PSK modulator
US4464767A (en) * 1981-09-08 1984-08-07 Paradyne Corporation System for generation of multiple pointed QAM signal spaces by use of synchronous Qam transmitters
FR2539261B1 (fr) * 1983-01-07 1989-07-13 Telecommunications Sa Emetteur pour faisceaux hertziens numeriques a multi-etats
US5237292A (en) * 1992-07-01 1993-08-17 Space Systems/Loral Quadrature amplitude modulation system with compensation for transmission system characteristics

Also Published As

Publication number Publication date
US5463355A (en) 1995-10-31

Similar Documents

Publication Publication Date Title
TW327262B (en) Wideband vector modulator
US5450044A (en) Quadrature amplitude modulator including a digital amplitude modulator as a component thereof
US5051754A (en) Optoelectronic wide bandwidth photonic beamsteering phased array
CA2050632A1 (en) Digital beam-forming technique using temporary noise injection
WO1996042160A3 (en) Transmission system using transmitter with phase modulator and frequency multiplier
CA2092452A1 (en) Adaptive signal modulation system
WO2006033722A3 (en) Method and apparatus for a fully digital quadrature modulator
AU4625599A (en) Vectorial modulator
CA2081154A1 (en) Digital modulator with digital power control circuit
JP4068415B2 (ja) 位相偏移変調方式の変調器
US3665314A (en) Communications system comprising a matrix network of modulation elements
CA2160503A1 (en) Wideband vector modulator
KR100210633B1 (ko) 업변환/변조장치및방법과,다중액세스디지탈송신기
JPS5637755A (en) Multiphase modulating device
AU723589B2 (en) Wideband vector modulator
EP0384595A3 (en) Digital phase shifter
EP0768782A1 (en) Wide-band microwave vector modulator
KR970024760A (ko) 광대역 벡터 변조기
CN1074608C (zh) 宽带矢量调制器
JPS57125537A (en) Space diversity receiver
BG103101A (en) Phase control device
JPS61193543A (ja) 多値直交振幅変調回路
CA2056021A1 (en) Digital quadrature phase detection circuit
JPS567553A (en) Digital type fm modulator
RU2000120020A (ru) Радиоприемное устройство когерентной рлс

Legal Events

Date Code Title Description
MK4A Expiration of patent term of an invention patent