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Добірка наукової літератури з теми "I/Q modulator impairments"

Автор: Grafiati

Опубліковано: 8 червня 2022

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Статті в журналах з теми "I/Q modulator impairments"

Anttila, Lauri, Peter Händel, Olli Mylläri, and Mikko Valkama. "Recursive learning-based joint digital predistorter for power amplifier and I/Q modulator impairments." International Journal of Microwave and Wireless Technologies 2, no. 2 (April 2010): 173–82. http://dx.doi.org/10.1017/s1759078710000280.

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The main implementation impairments degrading the performance of direct-conversion radio transmitters are in-phase/quadrature (I/Q) mismatch, local oscillator (LO) leakage, and power amplifier (PA) nonlinear distortion. In this article, we propose a recursive least-squares-based learning algorithm for joint digital predistortion (PD) of frequency-dependent PA and I/Q modulator impairments. The predistorter is composed of a parallel connection of two parallel Hammerstein (PH) predistorters and an LO leakage compensator, yielding a predistorter which as a whole is fully linear in the parameters. In the parameter estimation stage, proper feedback signal from the transmitter radio frequency (RF) stage back to the digital parts is deployed, combined with the indirect learning architecture and recursive least-squares training. The proposed structure is one of the first techniques to explicitly consider the joint estimation and mitigation of frequency-dependent PA and I/Q modulator impairments. Extensive simulation and measurement analysis is carried out to verify the operation and efficiency of the proposed PD technique. In general, the obtained results demonstrate linearization and I/Q modulator calibration performance clearly exceeding the performance of current state-of-the-art reference techniques.

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Anttila, Lauri, Peter Handel, and Mikko Valkama. "Joint Mitigation of Power Amplifier and I/Q Modulator Impairments in Broadband Direct-Conversion Transmitters." IEEE Transactions on Microwave Theory and Techniques 58, no. 4 (April 2010): 730–39. http://dx.doi.org/10.1109/tmtt.2010.2041579.

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Anastasijevic, Ana, Duska Coja, Natasa Neskovic, Aleksandar Neskovic, and Djuradj Budimir. "Joint power amplifier and I/Q modulator impairments modelling and compensation for LTE transmitters using artificial neural networks." AEU - International Journal of Electronics and Communications 69, no. 2 (February 2015): 529–38. http://dx.doi.org/10.1016/j.aeue.2014.11.005.

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Tyagi, Rishita. "Simulation and Performance Analysis of RoF System Using Fiber Impairments." International Journal for Research in Applied Science and Engineering Technology 10, no. 5 (May 31, 2022): 2055–61. http://dx.doi.org/10.22214/ijraset.2022.42759.

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Abstract: A Radio over Fiber (RoF) system has a unique feature of containing both a fiber optic link and a free space radio path. Fiber based wireless access facilitates high-capacity multimedia services in a real-time basis. In this research paper, the RoF system is simulated in the presence of fiber impairments, namely, Polarization Mode Dispersion (PMD) and Cross Phase Modulation (XPM) and Four-Wave Mixing (FWM) with the help of OptiSystem simulation tool. The variations in Quality factor (Q factor) and Bit Error Rate (BER) with respect to wavelength of 1552 nm and bit rates of 10 Gb/s of input signal is analyzed in the presence of the linear and non-linear impairments of the fiber. Keywords: Radio over Fiber (RoF), Polarization Mode Dispersion (PMD), Cross Phase Modulation (XPM), Four-Wave Mixing (FWM), OptiSystem, Bit Error Rate (BER), Q factor.

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Wu, Yibo, Ulf Gustavsson, Alexandre Graell I. Amat, and Henk Wymeersch. "Low Complexity Joint Impairment Mitigation of I/Q Modulator and PA Using Neural Networks." IEEE Journal on Selected Areas in Communications 40, no. 1 (January 2022): 54–64. http://dx.doi.org/10.1109/jsac.2021.3126024.

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Muhammad, Fazal, Farman Ali, Usman Habib, Muhammad Usman, Imran Khan, and Sunghwan Kim. "Time Domain Equalization and Digital Back-Propagation Method-Based Receiver for Fiber Optic Communication Systems." International Journal of Optics 2020 (February 12, 2020): 1–13. http://dx.doi.org/10.1155/2020/3146374.

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Fiber optic communication systems (FOCSs) have attained a lot of attention by revolutionizing the telecommunication industry and offering new possibilities with the technical advancements in state-of-the-art high speed digital electronics. Advanced modulation formats make use of the phase, amplitude, and polarization of the optical signals at the same time to provide high spectral efficiency as compared with 1 bit/s/Hz for the intensity modulation direct detection system (IMDD), but are highly prone to transmission impairments. Thus, the effects that add up to the optical fiber impairments such as optical fiber chromatic dispersion (OFCD), polarization model dispersion (PMD), and phase offset and noise (POaN) need to be addressed at the receiver side. The development of components and algorithms to minimize these effects in next generation FOCSs with 100 Gbps data rate and beyond with long-haul transmission is still a challenging issue. In this paper, digital signal processing- (DSP-) assisted dispersion and nonlinear compensation techniques are presented to compensate for physical layer impairments including OFCD, PMD, and POaN. The simulations are performed considering Dual Polarization- (DP-) QPSK modulation format to achieve two-fold data rate to achieve spectral efficiency of 3.28 bits/s/Hz by making use of the polarization diversity and system performance is investigated in terms of bit error rate (BER), constellation diagrams, and quality factor (Q-factor) for different values of optical signal-to-noise ratio (OSNR), launch power (PL), and fiber length.

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Trombley, Paul Q. "Selective Modulation of GABAA Receptors by Aluminum." Journal of Neurophysiology 80, no. 2 (August 1, 1998): 755–61. http://dx.doi.org/10.1152/jn.1998.80.2.755.

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Trombley, Paul Q. Selective modulation of GABAA receptors by aluminum. J. Neurophysiol. 80: 755–761, 1998. Aluminum has been implicated in several neurodegenerative conditions including Alzheimer's disease. Because the mammalian olfactory system has an unusual capacity for the uptake and transneuronal spread of inhaled substances such as aluminum, whole cell recording techniques were used to examine the actions of aluminum on basic membrane properties and amino acid receptors on rat olfactory bulb mitral/tufted (M/T) neurons in culture. Aluminum had little direct effects on M/T neurons. Aluminum (100 μM) did not evoke a membrane current or alter action-potential shape or duration. Aluminum also had no marked effects on the family of voltage-gated membrane currents evoked by a series of 10-mV, 50-ms depolarizing steps. However, aluminum dramatically potentiated the current evoked by 30 μM γ-aminobutyric acid (GABA) at concentrations <100 μM. Conversely, higher concentrations of aluminum blocked the GABA-evoked current. The effects of aluminum on GABA-evoked currents were not voltage dependent. Aluminum (100 μM) equally potentiated both inward currents at −30 mV and outward currents at + 30 mV. At 300 μM, aluminum blocked both inward and outward currents to a similar extent. In some neurons, aluminum only blocked the current and potentiation was not observed. The biphasic action of aluminum on GABA-evoked currents suggests separate binding sites: a high-affinity potentiating site and a low-affinity inhibiting site. Despite its effects on GABA-evoked currents, aluminum did not alter membrane currents evoked by glutamate, N-methyl-d-aspartate, kainate, or glycine. Aluminum also did not reduce spontaneous excitatory synaptic activity, suggesting little, if any, effect on glutamate release. Although a causal role for aluminum in Alzheimer's disease and other neuropathological conditions remains controversial, it is clear that elevated aluminum concentrations in the brain are associated with a variety of cognitive impairments. The present results indicate that aluminum can alter the function of GABAA receptors and may suggest that aluminum can contribute to cognitive impairment through disruption of inhibitory circuits.

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Aldaya, Ivan, Elias Giacoumidis, Geraldo de Oliveira, Jinlong Wei, Julián Leonel Pita, Jorge Diego Marconi, Eric Alberto Mello Fagotto, Liam Barry, and Marcelo Luis Francisco Abbade. "Histogram Based Clustering for Nonlinear Compensation in Long Reach Coherent Passive Optical Networks." Applied Sciences 10, no. 1 (December 23, 2019): 152. http://dx.doi.org/10.3390/app10010152.

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In order to meet the increasing capacity requirements, network operators are extending their optical infrastructure closer to the end-user while making more efficient use of the resources. In this context, long reach passive optical networks (LR-PONs) are attracting increasing attention.Coherent LR-PONs based on high speed digital signal processors represent a high potential alternative because, alongside with the inherent mixing gain and the possibility of amplitude and phase diversity formats, they pave the way to compensate linear impairments in a more efficient way than in traditional direct detection systems. The performance of coherent LR-PONs is then limited by the combined effect of noise and nonlinear distortion. The noise is particularly critical in single channel systems where, in addition to the the elevated fibre loss, the splitting losses should be considered. In such systems, Kerr induced self-phase modulation emerges as the main limitation to the maximum capacity. In this work, we propose a novel clustering algorithm, denominated histogram based clustering (HBC), that employs the spatial density of the points of a 2D histogram to identify the borders of high density areas to classify nonlinearly distorted noisy constellations. Simulation results reveal that for a 100 km long LR-PON with a 1:64 splitting ratio, at optimum power levels, HBC presents a Q-factor 0.57 dB higher than maximum likelihood and 0.21 dB higher than k-means. In terms of nonlinear tolerance, at a BER of 2×10 − 3 , our method achieves a gain of ∼2.5 dB and ∼1.25 dB over maximum likelihood and k-means, respectively. Numerical results also show that the proposed method can operate over blocks as small as 2500 symbols.

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Cohen, D. A., M. Hossein-Zadeh, and A. F. J. Levi. "High-Q microphotonic electro-optic modulator." Solid-State Electronics 45, no. 9 (September 2001): 1577–89. http://dx.doi.org/10.1016/s0038-1101(01)00165-4.

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Alavi, M. S., R. B. Staszewski, L. C. N. de Vreede, A. Visweswaran, and J. R. Long. "All-Digital RF $I/Q$ Modulator." IEEE Transactions on Microwave Theory and Techniques 60, no. 11 (November 2012): 3513–26. http://dx.doi.org/10.1109/tmtt.2012.2211612.

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Більше джерел

Дисертації з теми "I/Q modulator impairments"

Abdi, Abyaneh Mohammad. "Génération des signaux agrégés en fréquences dans le contexte de LTE-A." Electronic Thesis or Diss., Paris, ENST, 2016. https://pastel.hal.science/tel-03689710.

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Dans ce travail de thèse, on a proposé une structure de génération des signaux multi-porteuse afin de créer plusieurs oscillateurs locaux (OL ) tout en utilisant qu’un modulateur I/Q. Ces signaux peuvent être utilisés dans les récepteurs de LTE-A pour la transposition des signaux agrégé en fréquence vers la bande de base. On développe la structure afin de l’utiliser en émetteur répondant aux normes du standard LTE-A. La nouvelle structure nous permet de générer n signaux agrégés en fréquences, de manière simultanée, par une seule chaîne de transmission (c.a.d un modulateur I/Q, un OL). En utilisant cette structure on réduit le nombre de circuits utilisés, en comparaison du cas où n signaux agrégés en fréquences sont générés par n émetteurs. La fréquence d’échantillonnage est réduite dans notre cas par rapport au cas où les signaux sont générés directement de la bande de base à la bande RF avec des convertisseurs analogiques numériques adéquats. Dans la troisième partie, on se concentre sur les imperfections et les non linéarités du modulateur I/Q dans le cadre de notre structure multibande. On modélise le fonctionnement du modulateur multi-bande en utilisant les échantillons en entrée et en sortie. Notre modèle est dérivé de la série de Volterra qui prends en compte les effets non linéaires et les effets mémoires ainsi que les imperfections du modulateur I/Q. Puis, on obtient la fonction "inverse" du modèle et on l’applique à l’entrée du modulateur afin de corriger et linéariser la sortie du modulateur I/Q. La fonction "inverse" est appelée DPD (en anglais : Digital Pre-Distortion). Enfin, on a évalué le modèle et la DPD en simulations et en mesures
In this dissertation, a signal generation structure is proposed using which a multitone Local Oscillator (LO) signal is created by a single I/Q modulator. These LOs can be used in the CA receivers to down-convert the transmitted component carriers simultaneously. The multi-tone LO signal structure is further developed to be used at the transmitter as a CA generation solution. Using the proposed structure n-component carriers can be generated in parallel. This structures requires lower sampling rates with respect to the case where RF signals are synthesized directly by digital-to- analog converters. Moreover, less circuitry is required, because one single I/Q modulator is used to generate n component carriers, instead of n I/Q modulators. This work follows on investigating the origin of impairments and mild nonlinearities in our I/Q modulator. To overcome these problems, we focus on the functionality of the overall system rather than each component of the I/Q modulator. This method is called behavioral modeling. Once the nonlinear model is obtained, if its inverse function is applied to the input, a linearized output is expected. The generation of the inverse function is called Digital Pre-Distortion (DPD). We propose a tri-band behavioral model for nonlinearities and impairments in tri-band CA using our I/Q modulator. Furthermore, the DPD of the model is evaluated in simulations and experiments

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Bozic, M. "Joint compensation of I/Q impairments and PA nonlinearity in mobile broadband wireless transmitters." Thesis, University of Westminster, 2016. https://westminsterresearch.westminster.ac.uk/item/9yxv7/joint-compensation-of-i-q-impairments-and-pa-nonlinearity-in-mobile-broadband-wireless-transmitters.

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The main focus of this thesis is to develop and investigate a new possible solution for compensation of in-phase/quadrature-phase (I/Q) impairments and power amplifier (PA) nonlinearity in wireless transmitters using accurate, low complexity digital predistortion (DPD) technique. After analysing the distortion created by I/Q modulators and PAs together with nonlinear crosstalk effects in multi-branch multiple input multiple output (MIMO) wireless transmitters, a novel two-box model is proposed for eliminating those effects. The model is realised by implementing two phases which provide an optimisation of the identification of any system. Another improvement is the capability of higher performance of the system without increasing the computational complexity. Compared with conventional and recently proposed models, the approach developed in this thesis shows promising results in the linearisation of wireless transmitters. Furthermore, the two-box model is extended for concurrent dual-band wireless transmitters and it takes into account cross-modulation (CM) products. Besides, it uses independent processing blocks for both frequency bands and reduces the sampling rate requirements of converters (digital-to-analogue and analogue-to-digital). By using two phases for the implementation, the model enables a scaling down of the nonlinear order and the memory depth of the applied mathematical functions. This leads to a reduced computational complexity in comparison with recently developed models. The thesis provides experimental verification of the two-box model for multi-branch MIMO and concurrent dual-band wireless transmitters. Accordingly, the results ensure both the compensation of distortion and the performance evaluation of modern broadband wireless transmitters in terms of accuracy and complexity.

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Unlu, Ozkaya Ayse. "Design And Implementation Of A Broadband I-q Vector Modulator And A Feedforward Linearizer For V/uhf Band." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611565/index.pdf.

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Considering the requirements of the commercial and military applications on amplitude and phase linearity, it is necessary to reduce nonlinearity of the amplifiers. There are several linearization techniques that are used to reduce nonlinearity effects. Feedforward linearization technique is known as one of the best linearization methods due to its superior linearization performance and broadband operation. Vector modulators which allows amplitude and phase modulation simultaneously, is the most important component of a feedforward system. In this thesis, first of all a broadband V/UHF vector modulator designed and implemented. Then a feedforward system is investigated and implemented using the designed vector modulator for V/UHF band.

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Sabra, Mostafa. "Développement de lasers à fibres thulium bi-fréquences à impulsions synchrones pour la réalisation de sources Térahertz." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0118.

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Dans le cadre d’un projet collaboratif entre le laboratoire XLIM (UMR 7252 du CNRS et de l'Université de Limoges) et le laboratoire de recherche IPHT situé à Jena en Allemagne, mon projet de thèse consiste à développer un laser à fibre dopée thulium bi-fréquences largement accordable à impulsions synchrones pour la réalisation d’une source Térahertz puissante et accordable. Basé sur l’utilisation de deux réseaux de Bragg en volume (VBGs) et d’une fibre dopée thulium à double gaine et à maintien de polarisation (diamètre de coeur = 20 μm) fabriquée par la méthode REPUSIL, un laser mono-fréquence et bi-fréquences largement accordable a été réalisé et étudié en régime continu. Une accordabilité de 1nm à 144 nm a été obtenue avec une puissance supérieure à 4,5 W et un bon contraste signal sur bruit (~45 dB) et une largeur spectrale inférieure à 0,1 nm. En régime déclenché, un modulateur acousto-optique (AOM) a été utilisée en espace libre dans la cavité laser afin de générer les impulsions. La fibre à double gaine a été remplacée par une fibre dopée thulium à large coeur (40 μm) appelée FA-LPF pour repousser le seuil d’apparition des effets non-linéaires et travailler avec une fibre courte pour diminuer la durée d’impulsion et augmenter la puissance crête des impulsions obtenues. Une source déclenchée bi-fréquences largement accordable (de 3,8 nm jusqu’à 120nm) a été développée avec une puissance crête supérieure à 8 kW et une durée d’impulsion autour de 26 ns obtenues indépendamment de la valeur de Δλ pour une fréquence de répétition de 1 kHz. Un contraste supérieur à 20 dB a été obtenu limité par les pics parasites générés par le FWM pour les valeurs de Δλ inférieures à 45 nm. La largeur spectrale des raies lasers mesurée à 3 dB du maximum a été inférieure à 0,3 nm
As part of a collaborative project between the XLIM laboratory (UMR 7252 of the CNRS and the University of Limoges) and the IPHT research laboratory located in Jena, Germany, my thesis project consists in the development of a widely tunable dual-wavelength synchronous pulsed thulium doped fiber laser for the realization of an efficient and tunable terahertz source. Based on the use of two volume Bragg gratings (VBGs) and a double-clad, polarization-maintaining thulium doped fiber (core diameter = 20 μm) manufactured by the REPUSIL method, a widely tunable single-wavelength laser and dual-wavelength laser has been realized and studied in continuous regime. A tunability of 1 nm to 144 nm was obtained with a power more than 4.5 W and a good signal-to-noise contrast (~ 45 dB) and a spectral linewidth less than 0.1 nm. In pulse regime, an acousto-optic modulator (AOM) was used in free space in the laser cavity to generate the pulses. The double-clad fiber has been replaced by a large-core thulium doped fiber (40 μm) called FA-LPF to to fend off the threshold of non-linear effects and work with a short fiber to decrease the pulse duration and increase the peak power of the obtained pulses. A widely tunable (from 3.8 nm to 120 nm) Q-switched dual-wavelength synchronous-pulsed thulium-doped fiber laser was developed with a peak power more than 8 kW and a pulse duration around 26 ns obtained independently of the value of Δλ at 1 kHz of repetition rate. A contrast higher than 20 dB was obtained limited by the FWM peaks generated for Δλ values below 45 nm. The spectral linewidth of the laser measured at 3 dB of the maximum was less than 0.3 nm

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Sutorý, Tomáš. "NOVÉ PRINCIPY CHARAKTERIZACE HRADLOVÝCH KAPACIT PRO SIGMA-DELTA MODULÁTORY." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233499.

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This thesis deals with the utilization of new principles of characterization of gate capacitances for sigma-delta modulators. Sigma-delta modulators are the integral part of sigma-delta analog-to-digital converters. The proposed new method is characterized by high resolution and modest requirements for laboratory equipment. It allows characterizing capacitances whose values are within the range which is used in sigma-delta modulators. The thesis contains description of the new method, the analysis of measurement accuracy and experimental results.

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Liaw, Yueh-Ru, and 廖嶽儒. "Design and implementation of I/Q modulator." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/86472847692886361767.

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碩士
國立臺灣科技大學
工程技術研究所
83
In this paper, the design principles and implementation techniques of I/Q modulator are investigated. The I/Q modu- lator consists of DBMs(double-balanced mixers), phase shifter and power splitter/combiner, where each subcircuit has its distinct electric characteristics. To verify the theoretical results, we build the subcircuit by employing FR-4 boards, mixers and ferrite core. The measuremental results of each subcircuit and integrated I/Q modulator are discussed throu- ghly. We find that the characteristics of DBM dictate the per- formance of I/Q modulator.

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Huang, Chuan-Jung, and 黃絹容. "Design of Ka-band Up-Mixer and I/Q Modulator." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/37774964837132936799.

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Chung, Yi-Wei, and 鍾懿威. "Design of V-band Power Amplifier and I/Q Modulator." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/70578103754637080950.

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Анотація:

碩士
國立臺灣師範大學
應用電子科技學系
101
The purpose of this dissertation is to develop a Power Amplifier and an I/Q Modulator in a V-band millimeter-wave transmitter system. They are fabricated on TSMC 90 nm 1P9M RF CMOS process. With the development of wireless communication technologies, radio frequency integrated circuit tends to higher frequency, higher data rate, wider bandwidth, and higher integration. For this subject, unlicensed multi-GHz bandwidth around V-band makes very high data rate transmission feasible. We adopt CMOS technology. It has the advantages of small size, low cost, low power consumption, and high level of integration, all of which are for MMW applications. To develop a Power Amplifier and an I/Q Modulator in a V-band millimeter-wave transmitter system. We are using Agilent ADS software and SONNET software to be the simulation tools. The first circuit is Power Amplifier, which utilizes three-stage common source configuration amplifier. The first and second stages are drive stages. The third stage is power stage. To purpose higher linearity, we combine a Pre-distortion Linearizer on the power stage. The circuit will have better linearity than without Linearizer. The second circuit is I/Q Modulator, which is using two Modified Gilbert-cell Mixer, one Coupler, and one Wilkinson Combiner.

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Ya-tingChan and 詹雅婷. "A study on Q-switched Ince-Gaussian laser generation with acousto-optic modulator." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/57199672130697982997.

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Анотація:

碩士
國立成功大學
物理學系
103
The purpose of this study is to generate pulsed Ince-Gaussian(IG) lasers in end-pumped solid-state lasers and to reach different modes of selection and application of Q-switched pulsed lasers. The active Q-switch we adopting in this study is the acousto-optic (AO) modulator. However, we also adopt the chopper in this study. In the first part of the experiment, both of laser systems can be used to generate pulsed IG laser and observe the relaxation oscillation (RO). The second part of the experiment, we study on Q-switched Ince-Gaussian laser generation with AO modulator. Experimental result shows that, using AO Q-switched laser system, this study successfully generates pulsed IG lasers of several different modes. Besides, by classifying IGMs into even and odd groups, this study gives discussions on the relation between pulsed Ince-Gaussian lasers of different modes.

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Tsai, Yi-Chien, and 蔡宜蒨. "Design of Gilbert-cell Mixer, I-Q Modulator, and SPDT Switch in 60-GHz Applications." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/01544238454416459132.

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Анотація:

碩士
國立臺灣大學
電信工程學研究所
97
This thesis discusses Gilbert-cell down-conversion mixer, broadband I-Q modulator with improved sideband suppression, and a distributed single-pole-double-throw switch. The main purpose is to explore the frequency conversion components such as mixer and I-Q modulator, and improve the performance of quadrature coupler used in I-Q modulator to combine two orthogonal signals, and develop a broadband switch for high-frequency application at 60 GHz. In this thesis, a 60-GHz down-conversion Gilbert-cell mixer is discussed and fabricated. Modulators are important components in transmitters, recently reported modulators around 60 or 70 GHz normally emphasize their broadband property. 90° couplers are needed to modulate baseband signals with QPSK modulation. However, it is not easy for conventional broadside coupler to provide balanced output amplitude and accurate 90° output phase split in a very broadband fasion. Therefore, these modulators normally achieve high sideband suppression only in norrowband ranges. Making use of the phase lead property of a composite left/right hand transmission line, broadband quadrature power splitter can be designed. It can improve the sideband suppression of conventional modulators. Finally, single-pole-double-throw switches are important switching components in transceivers. A distributed SPDT switch using mHEMT process is fabricated. The insertion loss at 60 GHz is only 2 dB, which reduces the noise introduced by the switches in transceivers. To obtain low insertion loss, the SPDT switch use only three transistors for each SPST switch branch. As a trade-off from low insertion loss, the isolation is moderate.

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Частини книг з теми "I/Q modulator impairments"

Alavi, Morteza S., Jaimin Mehta, and Robert Bogdan Staszewski. "Idea of all-digital I/Q modulator." In Radio-Frequency Digital-to-Analog Converters, 129–41. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-802263-4.00006-4.

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Тези доповідей конференцій з теми "I/Q modulator impairments"

Crespo-Cadenas, Carlos, Javier Reina-Tosina, Maria J. Madero-Ayora, and Juan A. Becerra-Gonzalez. "Relationship between a pruned volterra model structure and impairments in an I/Q modulator." In 2017 12th European Microwave Integrated Circuits Conference (EuMIC). IEEE, 2017. http://dx.doi.org/10.23919/eumic.2017.8230739.

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Crespo-Cadenas, Carlos, Javier Reina-Tosina, Maria J. Madero-Ayora, and Juan A. Becerra-Gonzalez. "Relationship between a pruned volterra model structure and impairments in an I/Q modulator." In 2017 47th European Microwave Conference (EuMC). IEEE, 2017. http://dx.doi.org/10.23919/eumc.2017.8231045.

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Crespo-Cadenas, C., M. J. Madero-Ayora, J. Reina-Tosina, and J. A. Becerra-Gonzalez. "A widely nonlinear approach to compensate impairments in I/Q modulators." In 2015 European Microwave Conference (EuMC 2015). IEEE, 2015. http://dx.doi.org/10.1109/eumc.2015.7345811.

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Schubert, Benjamin, Ahmet Gokceoglu, Lauri Anttila, and Mikko Valkama. "Augmented Volterra predistortion for the joint mitigation of power amplifier and I/Q modulator impairments in wideband flexible radio." In 2013 IEEE Global Conference on Signal and Information Processing (GlobalSIP). IEEE, 2013. http://dx.doi.org/10.1109/globalsip.2013.6737113.

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Madero-Ayora, M. J., J. Reina-Tosina, C. Crespo-Cadenas, and J. A. Becerra-Gonzalez. "On the robustness of a widely nonlinear approach to model impairments in I/Q modulators." In 2015 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC). IEEE, 2015. http://dx.doi.org/10.1109/inmmic.2015.7330366.

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Tai Xin, Zuo Yongfeng, and Liu Liang. "Baseband signal predistortion based compensation technique for broadband I/Q modulation impairments in vector signal generators." In 2015 12th IEEE International Conference on Electronic Measurement & Instruments (ICEMI). IEEE, 2015. http://dx.doi.org/10.1109/icemi.2015.7494371.

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Luo, Fei, and T. Yeh. "LPFG modulator for fiber laser Q switching." In SPIE LASE: Lasers and Applications in Science and Engineering, edited by Denis V. Gapontsev, Dahv A. Kliner, Jay W. Dawson, and Kanishka Tankala. SPIE, 2009. http://dx.doi.org/10.1117/12.809797.

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Chandonnet, Alain, Gilles Larose, and Yves Painchaud. "All-fiber intensity modulator for Q switching." In Optics Quebec, edited by Michel Piche and Paul W. Pace. SPIE, 1994. http://dx.doi.org/10.1117/12.165622.

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Cianca, E., C. Stallo, M. Lucente, T. Rossi, C. Cornacchini, A. Vernucci, M. De Sanctis, and L. Bruca. "TRANSPONDERS: Effectiveness of Propagation Impairments Mitigation Techniques at Q/V Band." In 2008 IEEE Globecom Workshops. IEEE, 2008. http://dx.doi.org/10.1109/glocomw.2008.ecp.12.

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Sohn, Donggyu B., JunHwan Kim, and Gaurav Bahl. "Ultrahigh-Q silica-ALN hybrid disk optomechanical modulator." In 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2017. http://dx.doi.org/10.1109/memsys.2017.7863401.

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