Institution
Orange S.A.
Company•Paris, France•
About: Orange S.A. is a company organization based out in Paris, France. It is known for research contribution in the topics: Terminal (electronics) & Signal. The organization has 6735 authors who have published 9190 publications receiving 156440 citations. The organization is also known as: Orange SA & France Télécom.
Papers published on a yearly basis
Papers
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19 May 2008TL;DR: This paper presents an analysis of the classical channel estimation methods used for OFDM and introduces a new preamble-based channel estimation method that is evaluated, in both scenarios, using different pulse shaping and taking conventional CP-OFDM as reference.
Abstract: OFDM/OQAM is a special type of multi-carrier modulation that can be considered as an alternative to conventional OFDM with cyclic prefix (CP) for transmission over multi-path fading channels. Indeed, as it requires no CP, it has the advantage of a theoretically higher spectral efficiency. Furthermore, efficient pulse shaping can also be easily implemented with OFDM/OQAM. However, the classical channel estimation methods used for OFDM cannot be directly applied to OFDM/OQAM. In this paper we present an analysis of this problem and we introduce a new preamble-based channel estimation method. The performance results are obtained either by considering an IEEE802.22 channel model or regarding to the channel delay spread variation of a two-tap channel. The proposed OFDM/OQAM channel estimation method is evaluated, in both scenarios, using different pulse shaping and taking conventional CP-OFDM as reference.
101 citations
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TL;DR: In this paper, a new concept of dielectric pockets is proposed allowing suppression of short-channel effects (SCEs) and DIBL without increasing the channel doping, which is the ideal pocket architecture.
Abstract: A new concept of dielectric pockets is proposed allowing suppression of short-channel effects (SCEs) and DIBL without increasing the channel doping. The dielectric pockets have been implanted into 0.15-/spl mu/m PMOS devices showing substantial efficiency in reducing SCE and I/sub OFF/ current without altering the current drive. The dielectric pockets thus embody the ideal pocket architecture.
101 citations
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101 citations
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TL;DR: This work introduces a practical stream cipher with provable security named QUAD, which relies on the iteration of a multivariate quadratic system of m equations in n < m unknowns over a finite field.
Abstract: We introduce a practical stream cipher with provable security named QUAD. The cipher relies on the iteration of a multivariate quadratic system of m equations in n < m unknowns over a finite field. The security of the keystream generation of QUAD is provably reducible to the conjectured intractability of the MQ problem, namely solving a multivariate system of quadratic equations. Our recommended version of QUAD uses a 80-bit key, 80-bit IV and an internal state of n = 160 bits. It outputs 160 keystream bits (m = 320) at each iteration until 2 40 bits of keystream have been produced.
101 citations
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03 Dec 2008TL;DR: In this article, a user provides a user identifier and a user profile not associated with an avatar is retrieved based on the user identifier; the retrieved user profile may include at least one of a default profile, an advertiser supplied profile, a profile associated with a given user and a profiles associated with the virtual environment.
Abstract: A System, method nd device for providing an avatar for interaction in a virtual environment. A user provides a user identifier and a user profile not associated with an avatar is retrieved based on the user identifier. Avatar characteristics are determined based on the retrieved user profile. The virtual environment is rendered with an avatar based on the determined avatar characteristics. The retrieved user profile may include at least one of a default profile, an advertiser supplied profile, a profile associated with a given user and a profile associated with the virtual environment.
100 citations
Authors
Showing all 6762 results
Name | H-index | Papers | Citations |
---|---|---|---|
Patrick O. Brown | 183 | 755 | 200985 |
Martin Vetterli | 105 | 761 | 57825 |
Samy Bengio | 95 | 390 | 56904 |
Aristide Lemaître | 75 | 712 | 22029 |
Ifor D. W. Samuel | 74 | 605 | 23151 |
Mischa Dohler | 68 | 355 | 19614 |
Isabelle Sagnes | 67 | 753 | 18178 |
Jean-Jacques Quisquater | 65 | 335 | 18234 |
David Pointcheval | 64 | 298 | 19538 |
Emmanuel Dupoux | 63 | 267 | 14315 |
David Gesbert | 63 | 456 | 24569 |
Yonghui Li | 62 | 697 | 15441 |
Sergei K. Turitsyn | 61 | 722 | 14063 |
Joseph Zyss | 61 | 434 | 17888 |
Jean-Michel Gérard | 58 | 421 | 14896 |