Publications (274)
ARTICLE
OFDM codé pour le haut débit en fibre optique avec les codes correcteurs convolutifs, BCH, RS et LDPC
Serge Roland SANOU, François ZOUGMORE, Zacharie KOALAGA, Marcel KEBRE
Ce document présente une comparaison des performances des modulations OFDM (Orthogonal Frequency Division Multiplexing) codées pour la transmission optique haut débit à l’aide des techniques de codage canal convolutif, BCH, LDPC et Reed Solomon. L’évaluation des performances se base d’une part sur l’EVM (Error Vector Magnitude) afin d’apprécie(...)
OFDM, haut débit, BER, fibre optique
ARTICLE
Improving bug location using binary class relationships
Nasir Ali, Aminata Saban_e, Yann-Gael Gueheneuc, Giuliano Antoniol
Bug location assists developers in locating culprit source code that must be modified to fix a bug. Done manually, it requires intensive search activities with unpredictable costs of effort and time. Information retrieval (IR) techniques have been proven useful to speedup bug location in object-oriented programs. IR techniques compute the text(...)
Mots clés non renseignés
ARTICLE
PAPR Distribution Analysis at the Output of Nonlinear PAPR Reducers
Désiré GUEL, Jacques PALICOT
Nonlinear PAPR reducers, such as clipping and companding techniques, are some simple methods used to reduce the Peak-to-Average Power Ratio (PAPR). In this paper, assuming that the baseband OFDM signal is characterized as a band-limited complex Gaussian process, we investigate the PAPR distribution of an OFDM signal when it is passed through a(...)
Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Distribution, Nonlinear PAPR Reducers
ARTICLE
Properties and applications of the simplified generalized perpendicular bisector
Aurélie Richard, Gaëlle Largeteau-Skapin, Marc Rodríguez, Eric Andres, Laurent Fuchs & Jean-Serge Dimitri Ouattara
This paper deals with the Simplified Generalized Perpendicular Bisector (SGBP) presented in [15,1]. The SGPB has some interesting properties that we explore. We show in particular that the SGPB can be used for the recognition and exhaustive parameter estimation of noisy discrete circles. A second application we are considering is the error est(...)
Simplified Generalized Perpendicular Bisector, Adaptive Pixel Size, Generalized Reflection Symmetry, Rotation Reconstruction
ARTICLE
Transformation of any Adding Signal Technique in Tone Reservation Technique for PAPR Mitigation thanks to Frequency Domain Filtering
Désiré GUEL, Jacques PALICOT
Orthogonal Frequency Division Multiplexing (OFDM) suffers from a high Peak-to-Average Power Ratio (PAPR). Tone Reservation (TR) is a popular PAPR reduction technique that uses a set of reserved subcarriers to carry the peak reducing signal. The major advantages of TR technique include no transmission performance degradation, no transmission of(...)
Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Frequency Domain Filtering, Clipping Techniques
ARTICLE
Improving system testability and testing with microarchitectures
Aminata Sabane
Testing is essential to ensure software reliability and dependability. however, testing activities are very expensive and complex. Micro architectures, such as design patterns and anti-patterns, widely exist in object oriented systems and are recognized as influencing many software quality attributes. Our goal is to identify their impact on sy(...)
Mots clés non renseignés
ARTICLE
Tone reservation technique based on geometric method for orthogonal frequency division multiplexing peak to- average power ratio reduction
Désiré Guel, Jacques Palicot, Yves Louet
Orthogonal frequency division multiplexing (OFDM), has recently attracted considerable attention because of its features to combat delay spread or frequency selective fading of wireless or wireline channels. One of the major drawbacks of OFDM is the peak-to-average power ratio (PAPR) which leads to an inefficient use of high power amplifiers ((...)
Mots clés non renseignés
ARTICLE
Performance comparison of PRC based PAPR reduction schemes for WiLAN Systems
Hussain Sajjad, Guel Désiré, Louët Yves, Palicot Jacques
High Peak to Average Power Ratio (PAPR) is a main area of concern in multi-carrier communications as in Orthogonal Frequency Division Multiplexing (OFDM) modulated transmission. Several techniques have been devised to reduce the PAPR of the OFDM signal. One of these PAPR reduction techniques is based on Peak Reducing Carriers (PRC) concept whe(...)
Mots clés non renseignés
ARTICLE
FFT/IFFT Pair Based Digital Filtering for the Transformation of Adding Signal PAPR Reduction Techniques in Tone Reservation Techniques
Guel Désiré and Palicot Jacques
Orthogonal Frequency Division Multiplexing (OFDM) suffers from a high Peak-to-Average Power Ratio (PAPR). Tone Reservation (TR) is a popular PAPR reduction technique that uses a set of reserved subcarriers to carry the peak reducing signal. The major advantages of TR technique include no transmission performance degradation, no transmission of(...)
Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), FFT/IFFT pair Based Digital Filtering
ARTICLE
A Figure-of-Merit for Evaluating the Overall Performance of OFDM PAPR Reduction Techniques in the Presence of High Power Amplifier
Guel Désiré and Palicot Jacques
One of the major drawbacks of Orthogonal Frequency-Division Multiplexing (OFDM) is the large envelope fluctuations which either require an inefficient use of High Power Amplifiers (HPA) or decrease the system performance. Peak to-Average Power Ratio (PAPR) is a very well known measure of the envelope fluctuations and has become the cost functi(...)
Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Overall Performance (OP), High Power Amplifier (HPA)
ARTICLE
Transformation grâce à un Filtrage Numérique des techniques "Ajout de Signal" en techniques "Tone Reservation" pour la Réduction du PAPR des Signaux OFDM
Désiré GUEL, Jacques PALICOT
L'OFDM (Orthogonal Frequency Division Multiplexing) souffre d'une grande variation d'amplitude caractérisée par un PAPR (Peak-to-Average Power Ratio) élevé. La "Réservation Tone" (TR) est une technique de réduction de PAPR qui utilise un ensemble de porteuses réservées pour transmettre le "signal de réduction du PAPR". Du f(...)
PAPR, Tone Reservation, Signaux OFDM
ARTICLE
Analysis and comparison of clipping techniques for OFDM Peak-to-Average Power Ratio reduction
Guel Desire and Palicot Jacques
One of the main disadvantages of Orthogonal Frequency Division Multiplexing (OFDM) is its high Peak-to-Average Power Ratio (PAPR), which significantly reduces the efficiency of the High Power Amplifier (HPA). Due to the simplest way for PAPR reduction, clipping techniques are frequently used in practice for OFDM PAPR reduction. In this paper,(...)
Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Clipping techniques
ARTICLE
OFDM PAPR Reduction Based on Nonlinear Functions without BER Degradation and Out-of-Band Emission
Guel Désire and Palicot Jacques
Peak-to-average power ratio (PAPR) reduction techniques based on nonlinear functions (clipping, companding techniques, etc) are the most straightforward PAPR reduction methods. These techniques reduce the PAPR at the cost of generating distortions. In this paper, we prove basing on Bussgang theorem that in context of PAPR reduction techniques(...)
Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Nonlinear functions
ARTICLE
Clipping Formulated As an Adding Signal Technique for OFDM Peak Power Reduction
Guel Desire and Palicot Jacques
Due to the simplest way for PAPR reduction, clipping technique have been proposed and seem to be promising for use in commercial systems. In this paper, the conventional clipping technique is formulated as an adding signal technique for PAPR reduction. We show that, when clipping occurs very rarely, the adding signal for PAPR reduction commonl(...)
Peak to Average Power Ratio (PAPR), Nonlinear distortion, Wireless LAN
ARTICLE
Artificial signals addition for reducing PAPR of OFDM systems
Guel Desire and Palicot Jacques
One of the major drawbacks of OFDM modulation is the large envelope fluctuations which either result in an inefficient use of high power amplifiers (HPA) or decreased transmission system performance. Peak-to-Average Power Ratio (PAPR) is a very well known measure of the envelope fluctuations and has become the cost function used to evaluate an(...)
Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Artificial Signals