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Blind Compensation of I/Q Impairments in Wireless Transceivers

Mohsin Aziz, Fadhel Ghannouchi, Mohamed Helaoui
2017 Sensors  
In this paper, we propose a blind frequency-independent I/Q imbalance compensation method based on the maximum likelihood (ML) estimation of the imbalance parameters of a transceiver.  ...  Blind estimation techniques are attractive for avoiding the use of long training sequences.  ...  Acknowledgments: The authors would like to thank the iRadio Lab and its sponsors Alberta Innovates Technology Futures, Natural Sciences and Engineering Research Council of Canada and the Canada Research  ... 
doi:10.3390/s17122948 pmid:29257081 pmcid:PMC5751594 fatcat:pau7ebpoc5guzm63k3ivtt55ni

2019 Index IEEE Transactions on Circuits and Systems I: Regular Papers Vol. 66

2019 IEEE Transactions on Circuits and Systems Part 1: Regular Papers  
., +, TCSI Sept. 2019 3585-3597 Maximum likelihood estimation Statistics-Based Approach for Blind Post-Compensation of Modulator's Imperfections and Power Amplifier Nonlinearity.  ...  ., +, TCSI Oct. 2019 4044-4054 Statistics-Based Approach for Blind Post-Compensation of Modulator's Imperfections and Power Amplifier Nonlinearity. Aziz, M., +, TCSI March 2019 1063-1075 ) .  ...  Analysis of SRAM Enhancements Through Sense Amplifier  ... 
doi:10.1109/tcsi.2020.2966967 fatcat:f663jj5g45e3peggn3gwn5jys4

Blind Compensation of Impairments in Wireless Transceivers [article]

Mohsin Aziz, University Of Calgary, University Of Calgary, Fadhel M. Ghannouchi
2018
For the modulator's impairments, a maximum likelihood estimation of the imbalance parameters has been used to estimate and compensate for the modulator's imperfections.  ...  Secondly, a closed form PDF in the presence of gain and phase imbalances and the transmitter's power amplifier nonlinearity has been derived and validated.  ...  Chapter 4 :. 1 Introduction 41 Statistics Based Approach for Mitigation of Modulator's Imperfections and Power Amplifier Nonlinearity for Uplink Scenarios 4This chapter provides a two-step mitigation approach  ... 
doi:10.11575/prism/32684 fatcat:by6pd2o7ujcwjnip4v46guuhhq

An Engineering Guide To Photoinjectors [article]

Triveni Rao, David H. Dowell
2014 arXiv   pre-print
The chapters are written by renowned experts in the field who share their working knowledge of the technologies needed for designing and building photoinjectors.  ...  Since the discovery of electrons more than a century ago, the generation, transport and characterization of electron beams has been an active field of research.  ...  Hoberg, and Jens Knobloch from HZB and Ti Ruan from Soleil for fruitful discussions.  ... 
arXiv:1403.7539v1 fatcat:disdb4sfsfafna5gehz6lbgtw4

A combined phase contrast imaging and heterodyne interferometer system for multiscale fluctuation measurements (invited)

E. M. Davis, J. C. Rost, M. Porkolab, A. Marinoni, M. A. Van Zeeland
2018 Review of Scientific Instruments  
The intentional mid-k overlap has been empirically verified with sound-wave calibrations and should allow quantitative investigation of the cross-scale coupling predicted to be significant in the reactor-relevant  ...  been designed, installed, and operated at the DIII-D tokamak.  ...  The focus here, however, is on the analog, mixer-based approach. Section 3.5.1 describes ideal analog demodulation.  ... 
doi:10.1063/1.5035413 pmid:30399846 fatcat:hbvib2r3sbbz3praqcodpmvtzm

Effect of semiconductor laser noise on coherent optical OFDM systems

Zaid Al-Aubaidy
2017
This thesis presents an in-depth analysis of the long-haul coherent optical OFDM (CO-OFDM) link with pilot-aided feedforward loop (PA-FFL), which is used for pre-demodulation phase noise compensation.  ...  The thesis examines effect of large semiconductor laser noise on the OFDM's performance yielding a new homodyne OFDM design, and showing the feasibility of this technique comparing with the conventional  ...  The IQ optical modulator's driving levels , and are optimized for the minimal IQ optical modulator's nonlinearity contribution.  ... 
doi:10.4225/03/58a66a1158292 fatcat:kvmmxq7bofax3flmm2wcx6rso4

The effect of laser noise on an optical ofdm system

Zuraidah Zan
2017
There are two forms of receiver used for long haul O-OFDM links: coherent-OOFDM (CO-OFDM) and direct detection O-OFDM (DDO-OFDM).  ...  O-OFDM has been shown as a promising technique to increase spectral efficiency with its ability to compensate for chromatic and polarisation mode dispersion.  ...  ., Fiber nonlinearity pre-And post-compensation for long-haul optical links using OFDM. Optics Express, 2007. 15(20): p. 12965-12970. 83.  ... 
doi:10.4225/03/58b3a09699a17 fatcat:gioxfivnnfgcnonwr6hyraiwru

Real-time Digital Signal Processing for Software-defined Optical Transmitters and Receivers

Rene Marcel Schmogrow
2014
For instance, the LUT based Nyquist pulse shaping approach offers the possibility to compensate for the frequency response of the hardware by simply changing the precomputed filter responses stored in  ...  Finally, a blind post-equalizer (EQ D , using the least-mean square algorithm [80] ) is adapted by evaluating the measured error vector magnitude (EVM) [81] [82] .  ...  René Bonk for giving me insight into the field of access networks and semiconductor optical amplifiers. I want to thank all my colleagues at IPQ for the great collaboration.  ... 
doi:10.5445/ksp/1000042847 fatcat:juzwyq5mazhxtlan73n756h4lq

IN INGEGNERIA ELETTRONICA, DELLE TELECOMUNICAZIONI E TECNOLOGIE DELL'INFORMAZIONE, IN COLLABORAZIONE CON RETE FERROVIARIA ITALIANA Ciclo XXIX EVOLUTION OF COMMUNICATION AND MONITORING SYSTEMS FOR THE MANAGEMENT OF TRAFFIC AND SAFETY CONTROL SYSTEMS IN RAILWAY SITES Coordinatore Dottorato Relatore

Marco Govoni, A Vanelli-Coralli, D Dardari
unpublished
This technique is based on TOF estimate for different head tilts and on background subtraction approaches.  ...  Blind Zones for each pair of TX and RX antennas.B. Static Infrastructure versus a full image requirement.  ... 
fatcat:gn22qo2umbahxlxzarmrdodx7a