CA2245072A1 - One bit digital quadrature vector modulator - Google Patents

One bit digital quadrature vector modulator

Info

Publication number
CA2245072A1
CA2245072A1 CA 2245072 CA2245072A CA2245072A1 CA 2245072 A1 CA2245072 A1 CA 2245072A1 CA 2245072 CA2245072 CA 2245072 CA 2245072 A CA2245072 A CA 2245072A CA 2245072 A1 CA2245072 A1 CA 2245072A1
Authority
CA
Canada
Prior art keywords
digital
dqvm
bit
signals
digital quadrature
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2245072
Other languages
French (fr)
Other versions
CA2245072C (en
Inventor
Christian Cojocaru
Theodore Varelas
Mark Cloutier
Luc Lussier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skyworks Solutions Inc
Original Assignee
Philsar Electronics Inc
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
Priority claimed from CA002213156A external-priority patent/CA2213156A1/en
Application filed by Philsar Electronics Inc filed Critical Philsar Electronics Inc
Priority to CA 2245072 priority Critical patent/CA2245072C/en
Publication of CA2245072A1 publication Critical patent/CA2245072A1/en
Application granted granted Critical
Publication of CA2245072C publication Critical patent/CA2245072C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

A One Bit Digital Quadrature Vector Modulator (DQVM) and a method of generating single sideband output signals are useful for a wide range of radio frequency, signal processing and wireless applications. The DQVM simplifies the necessary digital multiplication by using noise shaped one bit versions of both the baseband I B and Q B signals to be modulated and the I LO and Q LO modulating signals. The one bit DQVM enables a much faster digital implementation of the digital quadrature vector modulation function than can be achieved with conventional multi-bit digital techniques. In addition the single sideband upconversion of the DQVM achieves high suppression of the unwanted sideband by applying an offset to one of the low speed input samples. Digital vector modulators are an improvement over conventional analog vector modulators as they are not subject to the amplitude and phase matching problems inherent in analog vector modulators.
CA 2245072 1997-08-15 1998-08-17 One bit digital quadrature vector modulator Expired - Fee Related CA2245072C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2245072 CA2245072C (en) 1997-08-15 1998-08-17 One bit digital quadrature vector modulator

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2,213,156 1997-08-15
CA002213156A CA2213156A1 (en) 1997-08-15 1997-08-15 One bit digital quadrature vector modulator
CA 2245072 CA2245072C (en) 1997-08-15 1998-08-17 One bit digital quadrature vector modulator

Publications (2)

Publication Number Publication Date
CA2245072A1 true CA2245072A1 (en) 1999-02-15
CA2245072C CA2245072C (en) 2003-10-21

Family

ID=25679551

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2245072 Expired - Fee Related CA2245072C (en) 1997-08-15 1998-08-17 One bit digital quadrature vector modulator

Country Status (1)

Country Link
CA (1) CA2245072C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1196999A1 (en) * 1999-04-24 2002-04-17 Motorola, Inc. Method and apparatus for processing a digital signal for analog transmission
US20160294590A1 (en) * 2015-03-31 2016-10-06 Sony Corporation Modulation apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1196999A1 (en) * 1999-04-24 2002-04-17 Motorola, Inc. Method and apparatus for processing a digital signal for analog transmission
EP1196999A4 (en) * 1999-04-24 2004-07-21 Motorola Inc Method and apparatus for processing a digital signal for analog transmission
US20160294590A1 (en) * 2015-03-31 2016-10-06 Sony Corporation Modulation apparatus

Also Published As

Publication number Publication date
CA2245072C (en) 2003-10-21

Similar Documents

Publication Publication Date Title
US4584541A (en) Digital modulator with variations of phase and amplitude modulation
KR100221692B1 (en) Transmitter with modified carrier signal generating electronic device
US5784412A (en) Transmitter and method for transmitting a modulated wave with variable envelope
CA2050632A1 (en) Digital beam-forming technique using temporary noise injection
EP2228963A3 (en) Quadrature modulator which employs four 90-degrees-shifted carriers
WO1996042160A3 (en) Transmission system using transmitter with phase modulator and frequency multiplier
CA2033301A1 (en) Modulation device with input signal modification for correction of amplifier nonlinearities
GB2359207A (en) Linear RF power amplifier and transmitter
CA2062980A1 (en) Hybrid modulation apparatus
KR970018986A (en) Modulator, indirect modulator and frequency multiplier (A MODULATOR, AN INDIRECT MODULATION MODULATOR AND FREQUENCY MULTIPLIER)
EP1304826A3 (en) Waveform generation for interplex modulation
CA2194695A1 (en) A direct conversion receiver
AU7225191A (en) A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter
JPH0681169B2 (en) Quadrature modulation method and device
AU2001223770A1 (en) Method of clipping signal amplitudes in a modulation system
WO2004012343A3 (en) Radio transceiver architectures and methods
WO2001041386A8 (en) Method and apparatus for rotating the phase of a complex psk signal
US4130802A (en) Unidirectional phase shift keyed communication system
WO2003024047A3 (en) Reception of a plurality of phase-modulated signals
CA2104729A1 (en) Quadrature Modulation Circuit for Use in a Radio Transmitter
US5438686A (en) Amplitude-modulated broadcast transmitter for various types of modulation, in particular DSB, SSB and ISB
CA2080786A1 (en) Vector fm modulator
CA2245072A1 (en) One bit digital quadrature vector modulator
KR900001253A (en) Signal sampling device
GB1519574A (en) Quadraphse modulator

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed