A Compact QPSK Modulator with Low Amplitude and Phase Imbalance for Remote Sensing Applications

Handle URI:
http://hdl.handle.net/10754/246373
Title:
A Compact QPSK Modulator with Low Amplitude and Phase Imbalance for Remote Sensing Applications
Authors:
Ghaffar, Farhan Abdul; Al-Naffouri, Tareq Y.; Mobeen, M. Kashan; Salama, Khaled N. ( 0000-0001-7742-1282 ) ; Shamim, Atif ( 0000-0002-4207-4740 )
Abstract:
A new, compact and wide-band Quadrature Phase Shift Keying (QPSK) modulator is presented for remote sensing applications. The microstrip-based modulator employs quadrature hybrid coupler, Wilkinson divider, rat race coupler and GaAs MESFET switches. It is designed to be part of an X band remote sensing transmitter with a center frequency of 8.25GHz. The fabricated module demonstrates the lowest reported amplitude and phase imbalances (0.1dB and 0.4° respectively) around its center frequency. The modulation, tested up to 160 Mbps data rate, displays carrier suppression greater than 30 dB. With negligible DC power consumption and low insertion loss, it operates for a wide bandwidth of 3 GHz (7-10 GHz). The effect of amplitude and phase imbalance is investigated on the performance of the modulator. Finally, a transmitter employing this modulator exhibits an excellent overall Error Vector Magnitude (EVM) of around 8 % that is considerably low as compared to the typically obtained values for such transmitters.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Sensors Lab
Publisher:
Institute of Electrical and Electronics Engineers
Journal:
Canadian Journal on Electrical and Electronics Engineering
Issue Date:
30-Sep-2012
Type:
Article
ISSN:
0840-8688
Additional Links:
http://www.ampublisher.com/April%202011/EEE-1104-017ACompactQPSKModulatorwithLowAmplitudeandPhaseImbalanceforRemoteSensingApplications.pdf
Appears in Collections:
Articles; Sensors Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGhaffar, Farhan Abdulen
dc.contributor.authorAl-Naffouri, Tareq Y.en
dc.contributor.authorMobeen, M. Kashanen
dc.contributor.authorSalama, Khaled N.en
dc.contributor.authorShamim, Atifen
dc.date.accessioned2012-09-30T17:42:07Z-
dc.date.available2012-09-30T17:42:07Z-
dc.date.issued2012-09-30en
dc.identifier.issn0840-8688en
dc.identifier.urihttp://hdl.handle.net/10754/246373en
dc.description.abstractA new, compact and wide-band Quadrature Phase Shift Keying (QPSK) modulator is presented for remote sensing applications. The microstrip-based modulator employs quadrature hybrid coupler, Wilkinson divider, rat race coupler and GaAs MESFET switches. It is designed to be part of an X band remote sensing transmitter with a center frequency of 8.25GHz. The fabricated module demonstrates the lowest reported amplitude and phase imbalances (0.1dB and 0.4° respectively) around its center frequency. The modulation, tested up to 160 Mbps data rate, displays carrier suppression greater than 30 dB. With negligible DC power consumption and low insertion loss, it operates for a wide bandwidth of 3 GHz (7-10 GHz). The effect of amplitude and phase imbalance is investigated on the performance of the modulator. Finally, a transmitter employing this modulator exhibits an excellent overall Error Vector Magnitude (EVM) of around 8 % that is considerably low as compared to the typically obtained values for such transmitters.en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineersen
dc.relation.urlhttp://www.ampublisher.com/April%202011/EEE-1104-017ACompactQPSKModulatorwithLowAmplitudeandPhaseImbalanceforRemoteSensingApplications.pdfen
dc.subjectError Vector Magnitude (EVM)en
dc.subjectBit Error Rate (BER)en
dc.subjectQuadrature Phase Shift Keying (QPSK)en
dc.subjectSignal to Noise Ratio (SNR)en
dc.titleA Compact QPSK Modulator with Low Amplitude and Phase Imbalance for Remote Sensing Applicationsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentSensors Laben
dc.identifier.journalCanadian Journal on Electrical and Electronics Engineeringen
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Engineering, University of Warwick, Coventry, CV4 7AL, United Kingdomen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, Texas A and M University, Texas A and M Engineering Building, Education City, Doha, Qataren
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
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