thierry pollet
KU Leuven, Flanders Business School, Faculty Member
Werkwijze en inrichting voor het over een ruisrijk medium binnen een voorafbepaalde frequentieband, overdragen van data, waarbij een datasignaal met een breedbandig spectrum gevormd wordt door een pseudo-ruis code met de over te dragen... more
Werkwijze en inrichting voor het over een ruisrijk medium binnen een voorafbepaalde frequentieband, overdragen van data, waarbij een datasignaal met een breedbandig spectrum gevormd wordt door een pseudo-ruis code met de over te dragen data te mengen en waarbij het ontavangen datasignaal aan een korrelatie operatie met de pseudo-ruis code wordt onderworpen ter extractie van de data. Het datasignaal wordt gemoduleerd op een draaggolf met een frequentie fo gekozen binnen genoemde freuqentieband en waarbij een chipfrequentie fc gebruikt wordt dieeen nagenoeg gehele franktie (M) bedraagt (2fo = fc.M) van het dubbele van de draaggolffrequentie.
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... Record Details. Record ID, 246252. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. Title, A Low Cost Spread Spectrum... more
... Record Details. Record ID, 246252. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. Title, A Low Cost Spread Spectrum Transceiver for Mains Signalling. ...
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... Please use this identifier to cite or link to this item: Record Details. Record ID, 246254. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University... more
... Please use this identifier to cite or link to this item: Record Details. Record ID, 246254. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. ...
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... Record Details. Record ID, 237609. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Van Bladel [801000818089] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University... more
... Record Details. Record ID, 237609. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Van Bladel [801000818089] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. ...
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... Please use this identifier to cite or link to this item: Record Details. Record ID, 264317. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University... more
... Please use this identifier to cite or link to this item: Record Details. Record ID, 264317. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. ...
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Abstract We determine the maximum bit rate that can be achieved by a multitone transceiver for either unidirectional or bidirectional data transmission on a single twisted pair cable of 50 m, which is used to connect the subscriber to an... more
Abstract We determine the maximum bit rate that can be achieved by a multitone transceiver for either unidirectional or bidirectional data transmission on a single twisted pair cable of 50 m, which is used to connect the subscriber to an optical network unit at the pedestal. We ...
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High speed digital subscriber line (DSL) systems transmit signals that overlap in spectrum with the bands used for radio communications. AM broadcast stations and radio amateur transmitters result into electromagnetic interference... more
High speed digital subscriber line (DSL) systems transmit signals that overlap in spectrum with the bands used for radio communications. AM broadcast stations and radio amateur transmitters result into electromagnetic interference impairing the DSL-receiver. For discrete multitone systems, windowing, in combination with radio frequency interference (RFI) cancellation has been proposed to make DSL-transceivers robust to radio ingress. This paper shows how windowing has an equivalent implementation by means of the so-called per tone equalization
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A method for estimating attributes of a transmission line (LP), said method comprising the steps of: making measurements reflectometry said transmission line, determining from said measurements reflectometry parameter dispersion 1 port of... more
A method for estimating attributes of a transmission line (LP), said method comprising the steps of: making measurements reflectometry said transmission line, determining from said measurements reflectometry parameter dispersion 1 port of said line transmission is a base reference impedance (Zref), estimating a characteristic impedance (Z0) of said transmission line, wherein said method further comprises the steps of: converting said dispersion parameter of one port from said base impedance reference to a base of characteristic impedance estimated, thereby producing a second parameter scattering port 1 with reflections from the proximal end waste, determining a time zone wherein said reflections of the proximal end residuals are locked, neutralizing the contribution of said time zone in the process of estimating said attributes s of said transmission line.
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... Record Details. Record ID, 246242. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Hendrik Van De Velde [801000867401] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University... more
... Record Details. Record ID, 246242. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Hendrik Van De Velde [801000867401] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. ...
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... Record Details. Record ID, 246248. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. Title, Symbol timing and carrier... more
... Record Details. Record ID, 246248. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. Title, Symbol timing and carrier synchronization in OFDM systems. ...
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Different combinations of echo cancellation (implemented partly in the frequency domain and partly in the time domain, see [1], [2]) and equalization are considered for DMT-based ADSL modems. Computational complexity is compared for... more
Different combinations of echo cancellation (implemented partly in the frequency domain and partly in the time domain, see [1], [2]) and equalization are considered for DMT-based ADSL modems. Computational complexity is compared for schemes applying first equalization and then echo cancellation or vice versa. It is demonstrated how time/frequency domain echo cancellation can be combined with so-called per tone equalization, leading to optimal capacity, generally not achievable with time domain equalization.
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Abstract—A preprocessing algorithm is proposed to visualize the time-domain one-port scattering parameter of a subscriber line measured at the Central Office. To overcome the high line attenuation and the mismatch between the line and the... more
Abstract—A preprocessing algorithm is proposed to visualize the time-domain one-port scattering parameter of a subscriber line measured at the Central Office. To overcome the high line attenuation and the mismatch between the line and the measurement instrument, a preprocessing algorithm is developed to obtain numerically the impulse response of the one-port scattering parameter. The algorithm will search for a quasi-optimal base impedance for the scattering parameter; then, it will de-noise and de-alias the impulse response and will provide an estimate for the first meaningful significant reflection. Index Terms—Impulse response, scattering parameter, time alias, time-domain reflectometry (TDR), transmission lines. I.
An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-taps frequency domain equalizer (FEQ) per tone, is... more
An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-taps frequency domain equalizer (FEQ) per tone, is modified into a structure with a (complex) multitaps FEQ per tone. By solving an MMSE problem, the SNR is maximized for each individual tone. This always results in a larger bitrate while complexity during data transmission is kept at the same level. Moreover, the per tone equalization is shown to have a reduced sensitivity to the synchronization delay.
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The IEEE 754 Floating point standard [1] specifies a simple (32 bits) and double precision (64 bits). For the FFT block in a DSL modem (DMT based), even 32 bits proves to be too much, and a custom number of bits can be used. This in turn... more
The IEEE 754 Floating point standard [1] specifies a simple (32 bits) and double precision (64 bits). For the FFT block in a DSL modem (DMT based), even 32 bits proves to be too much, and a custom number of bits can be used. This in turn will lead to savings in area and power on the ASIC implementation. Several techniques were considered for reducing the number of bits.
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... Please use this identifier to cite or link to this item: Record Details. Record ID, 246232. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; C COLLE; Marc Moeneclaey [801000521231] - Ghent University... more
... Please use this identifier to cite or link to this item: Record Details. Record ID, 246232. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; C COLLE; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. ...
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... Please use this identifier to cite or link to this item: Record Details. Record ID, 246250. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University... more
... Please use this identifier to cite or link to this item: Record Details. Record ID, 246250. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. ...
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The lift-off of DSL (digital subscriber line) has urged the subscriber line testing equipment manufacturers to extend their narrowband POTS (plain old telephony service) testheads towards DSL. The local loop, which connects the customer... more
The lift-off of DSL (digital subscriber line) has urged the subscriber line testing equipment manufacturers to extend their narrowband POTS (plain old telephony service) testheads towards DSL. The local loop, which connects the customer premises (CP) to the central office (CO) and which has been designed for POTS voice-band transmission, may have numerous impairments with respect to DSL. Some impairments, such as load coils, have to be detected, located, and removed. Others, such as bridged taps, don't have to be removed, but can seriously impact the maximum achievable loop bit rate. The dream of every telecom operator is a testhead that can accurately estimate the loop channel capacity expressed in bit/s by means of single-ended measurements only. In this paper we will give an overview of local loop impairments and subscriber line testing methods, focussing on metallic line testing and especially time-domain reflectometry (TDR). The authors have developed a reflectometric loop ...
Abstract: Three different transport modes have been specified and standardized for use in various Digital Subscriber Line (xDSL) systems: Asynchronous Transfer Mode (ATM), Synchronous Transfer Mode (STM) and more recently Packet Transfer... more
Abstract: Three different transport modes have been specified and standardized for use in various Digital Subscriber Line (xDSL) systems: Asynchronous Transfer Mode (ATM), Synchronous Transfer Mode (STM) and more recently Packet Transfer Mode (PTM). ...
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Research Interests: Complexity, Convergence, Algorithm, Multidisciplinary, Adaptive Filtering, and 15 moreEqualization, Noise, Lead, Convergence Rate, Adaptive Filter, Real Time, Adaptive Filters, Least Mean Square, ADSL, Digital Subscriber Lines, Recursive Least Square, Equalizer, Frequency Domain, Least squares method, and OFDM modulation
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The IEEE 754 Floating point standard (1) specifies a simple (32 bits) and double precision (64 bits). For the FFT block in a DSL modem (DMT based), even 32 bits proves to be too much, and a custom number of bits can be used. This in turn... more
The IEEE 754 Floating point standard (1) specifies a simple (32 bits) and double precision (64 bits). For the FFT block in a DSL modem (DMT based), even 32 bits proves to be too much, and a custom number of bits can be used. This in turn will lead to savings in area and power on the ASIC implementation. Several
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... Record ID, 273446. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Heidi Steendam [801001014820] - Ghent University Heidi.Steendam@UGent.be; Marc Moeneclaey [801000521231] - Ghent University... more
... Record ID, 273446. Record Type, conference. Author, Thierry Pollet [801000731395] - Ghent University; Heidi Steendam [801001014820] - Ghent University Heidi.Steendam@UGent.be; Marc Moeneclaey [801000521231] - Ghent University Marc.Moeneclaey@UGent.be. ...
An improved optimization algorithm for the time domain equalizer (TEQ) is developed for discrete multitone (DMT) based asymmetric digital subscriber line (ADSL). In contrast with existing algorithms, our algorithm explicitly disregards... more
An improved optimization algorithm for the time domain equalizer (TEQ) is developed for discrete multitone (DMT) based asymmetric digital subscriber line (ADSL). In contrast with existing algorithms, our algorithm explicitly disregards the unused tones in the cost function as well as in the non-triviality constraint. Simulation results are presented for the upstream channel. It is shown that the achievable bitrate
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Abstract An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-tap frequency domain equalizer (FEQ) per tone,... more
Abstract An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-tap frequency domain equalizer (FEQ) per tone, is modified into a structure ...
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Abstract An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-taps frequency domain equalizer (FEQ) per tone,... more
Abstract An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-taps frequency domain equalizer (FEQ) per tone, is modi ed into a structure ...
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Abstract The performance degradation of filter bank based multicarrier (MC) transmission due to timing errors is investigated. A MC receiver structure is considered where the dispersive channel is equalized by means of a fractionally... more
Abstract The performance degradation of filter bank based multicarrier (MC) transmission due to timing errors is investigated. A MC receiver structure is considered where the dispersive channel is equalized by means of a fractionally spaced equalizer. In principle, ...
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In the coming years user-centric services will be deployed in our homes, cars, offices, etc. Users expect that these services are autonomous and user-friendly. This requires that these services can adapt themselves to changes in the... more
In the coming years user-centric services will be deployed in our homes, cars, offices, etc. Users expect that these services are autonomous and user-friendly. This requires that these services can adapt themselves to changes in the environment, implying that they have to become context- aware. In this paper we present a formal context model and an OSGi based framework that
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Abstract An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-tap frequency domain equalizer (FEQ) per tone,... more
Abstract An alternative receiver structure is presented for discrete multitone (DMT)-based systems. The usual structure consisting of a (real) time domain equalizer (TEQ) with a (complex) 1-tap frequency domain equalizer (FEQ) per tone, is modified into a structure ...
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One class of the recentlydeveloped subspace identification algorithms identifies stochasticlinear time-invariant systems. Therefore these algorithms are useful for the determinationof the modal parameters of a vibrating structure excited... more
One class of the recentlydeveloped subspace identification algorithms identifies stochasticlinear time-invariant systems. Therefore these algorithms are useful for the determinationof the modal parameters of a vibrating structure excited by unmeasured ambient loading.After the introduction, the stochastic subspace identification technique is explained. Therelation between on the one hand, the model of the vibrating structure and on the otherhand, the stochastic system
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Abstract Investigates how the carrier phase jitter of a phase-locked oscillator for IF-to-baseband conversion affects the performance of single-carrier QAM (SC-QAM) and multi-carrier QAM (MC-QAM). This phase jitter reduces the... more
Abstract Investigates how the carrier phase jitter of a phase-locked oscillator for IF-to-baseband conversion affects the performance of single-carrier QAM (SC-QAM) and multi-carrier QAM (MC-QAM). This phase jitter reduces the signal-to-noise ratio (SNR) at the ...
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Research Interests: Management, Architecture, Renewable Energy, Solar Cell, Mesh generation, and 17 moreEnergy Consumption, Energy Management, Data Communication, Wind turbine, Power Generation, User Involvement, Wind Turbines, Power Grid, Net Energy, Coordination Mechanisms, Energy Management System, Distributed Generators, Electricity Generation, Service Architecture, Supply and Demand, Power System Simulation, and Low voltage
Research Interests: Renewable Energy, Service Oriented Architecture, Solar Cell, Energy Consumption, Energy efficiency, and 17 moreEnergy Management, Electricity, Smart grids, Wind turbine, Wind Turbines, Power Grid, Real Time, Field Trial, Energy Management System, Energy efficient, Internet services, Energy Efficiency, Smart Grids, Electricity Generation, Service Architecture, Supply and Demand, and Internet
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High speed digital subscriber line (DSL) systems transmit signals that overlap in spectrum with the bands used for radio communications. AM broadcast stations and radio amateur transmitters result into electromagnetic interference... more
High speed digital subscriber line (DSL) systems transmit signals that overlap in spectrum with the bands used for radio communications. AM broadcast stations and radio amateur transmitters result into electromagnetic interference impairing the DSL-receiver. For discrete multitone systems, windowing, in combination with radio frequency interference (RFI) cancellation has been proposed to make DSL-transceivers robust to radio ingress. This paper shows
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... Therefore, in DMT transmission, two types of synchronization can be distinguished: samplesynchronization and symbol synchronization. The sample synchronization unit guarantees frequency alignment of the receiver sampling clock with... more
... Therefore, in DMT transmission, two types of synchronization can be distinguished: samplesynchronization and symbol synchronization. The sample synchronization unit guarantees frequency alignment of the receiver sampling clock with the transmitter sampling clock. ...
Research Interests: Distributed Computing, Synchronization, Modulation, Estimation Theory, OFDM, and 12 moreSampling methods, Error Correction, Maximum Likelihood Estimation, GNSS receivers, IEEE Communications Magazine, TRANSMITTERS, Transfer Functions, Electrical And Electronic Engineering, DT Signal+generators, Synchronisation, maximum likelihood estimate, and receiver function
In this contribution, we investigate how the carrier phase jitter of a phase-locked oscillator for IF-to-baseband conversion affects the performance of single-carrier QAM (SC-QAM) and multi-carrier QAM (MC-QAM); the considered... more
In this contribution, we investigate how the carrier phase jitter of a phase-locked oscillator for IF-to-baseband conversion affects the performance of single-carrier QAM (SC-QAM) and multi-carrier QAM (MC-QAM); the considered multi-carrier system is of the OFDM ( ...
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In discrete multi-tone (DMT) systems, demodulation of the QAM modulated sinusoids is achieved by a fast Fourier transform (FFT) on blocks of samples generated from the received continuous-time signal. A clock difference between... more
In discrete multi-tone (DMT) systems, demodulation of the QAM modulated sinusoids is achieved by a fast Fourier transform (FFT) on blocks of samples generated from the received continuous-time signal. A clock difference between transmitter and receiver, ...
Research Interests: Digital Signal Processing, Synchronization, Frequency-domain analysis, FFT, Demodulation, and 13 moreTRANSMITTERS, Fast Fourier Transform, Time Domain, Discrete Time Systems, Receiver, Transmitter, Digital Subscriber Lines, Quadrature Amplitude Modulation, Fast Fourier Transforms, DT Signal+generators, Frequency Domain, Transceivers, and Synchronisation
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The IEEE 754 Floating point standard [1] specifies a simple (32 bits) and double precision (64 bits). For the FFT block in a DSL modem (DMT based), even 32 bits proves to be too much, and a custom number of bits can be used. This in turn... more
The IEEE 754 Floating point standard [1] specifies a simple (32 bits) and double precision (64 bits). For the FFT block in a DSL modem (DMT based), even 32 bits proves to be too much, and a custom number of bits can be used. This in turn will lead to savings in area and power ...
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Europe is currently defining its future energy market model. In this environment, the mix of regulated parties, competitive actors, energy policy makers, regulators and politicians will determine the structure of the value network, the... more
Europe is currently defining its future energy market model. In this environment, the mix of regulated parties, competitive actors, energy policy makers, regulators and politicians will determine the structure of the value network, the market roles and the operating principles of the power system. The article describes what the future of digital electricity brings
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... This interference is considered as addition-al noise. III. DEGRADATION The degradation of the BER performance, given a certain BER, can be defined as the increase of SNR at the input of the decision device needed to compensate for the... more
... This interference is considered as addition-al noise. III. DEGRADATION The degradation of the BER performance, given a certain BER, can be defined as the increase of SNR at the input of the decision device needed to compensate for the impair-ment. ...
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Abstract In this contribution the transmission of M-PSK and M-QAM modulated orthogonal frequency division multiplexed (OFDM) signals over an additive white Gaussian noise (AWGN) channel is considered. The degradation of the bit error rate... more
Abstract In this contribution the transmission of M-PSK and M-QAM modulated orthogonal frequency division multiplexed (OFDM) signals over an additive white Gaussian noise (AWGN) channel is considered. The degradation of the bit error rate (BER), caused by the ...
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... This interference is considered as addition-al noise. III. DEGRADATION The degradation of the BER performance, given a certain BER, can be defined as the increase of SNR at the input of the decision device needed to compensate for the... more
... This interference is considered as addition-al noise. III. DEGRADATION The degradation of the BER performance, given a certain BER, can be defined as the increase of SNR at the input of the decision device needed to compensate for the impair-ment. ...
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A new physical model `VUB1' is proposed to characterize a metallic parallel wire or twisted wire pair. The VUB1 model is compared with a rational function in the s-domain and with the popular physical model `BTO' of British Telecom as... more
A new physical model `VUB1' is proposed to characterize a metallic parallel wire or twisted wire pair. The VUB1 model is compared with a rational function in the s-domain and with the popular physical model `BTO' of British Telecom as described in the standards far Metallic Access Networks. The VUB model contains a limited parameter set and is linear and time invariant. Metallic cable characterization with physical models is compared with rational functions in the Laplace domain. A Maximum Likelihood Estimation framework is used in the frequency domain to identify the model parameters. The performance of the models is compared with a simulation directly based on measurements
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Abstract Per tone equalization for DMT-receivers has been proposed as an alternative structure for time domain equalization combined with 1-tap frequency domain equalization. With comparable complexity during data transmission, higher... more
Abstract Per tone equalization for DMT-receivers has been proposed as an alternative structure for time domain equalization combined with 1-tap frequency domain equalization. With comparable complexity during data transmission, higher capacity is obtained. In this ...
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Faced with fierce competition from cable operators, telephone companies are now aggressively investing in digital subscriber line technology with the objective of providing an economic broadband access alternative. However, high-bit-rate... more
Faced with fierce competition from cable operators, telephone companies are now aggressively investing in digital subscriber line technology with the objective of providing an economic broadband access alternative. However, high-bit-rate transmissions over the metallic access network is far from trivial. The subscriber loop predominantly consists of interconnection of twisted pair copper sections. This causes severe attenuation of the high-frequency components
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In response to fierce competition, telecom service providers re-engineer their IT and telecommunications services environment in order to offer a wide range of new value-added services faster and more cost efficiently. These organizations... more
In response to fierce competition, telecom service providers re-engineer their IT and telecommunications services environment in order to offer a wide range of new value-added services faster and more cost efficiently. These organizations are adopting a service-oriented paradigm in order to rationalize the OSS and BSS infrastructure, introduce self-service systems and manage 3rd party business-to-business interactions. This paper investigates how service-oriented principles introduced in the business domains can extend into the telecom services domain. An approach for telecommunications service creation in a SOA through service orchestration is detailed and illustrated by a use case for triple play (3P).