Zobrazeno 1 - 10
of 109
pro vyhledávání: '"R. Vallet"'
Publikováno v:
IEEE Transactions on Communications. 54:619-624
In this letter, we present an analysis tool for the convergence of a turbo decoder using the min-sum algorithm. First of all, we classify cycles on a turbo code factor graph. We define and develop a quantity which characterizes the trellis convergenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db0a3142f4a11f150a905539d3e44e02
https://doi.org/10.1109/tcomm.2006.873070
https://doi.org/10.1109/tcomm.2006.873070
Akademický článek
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Publikováno v:
International Journal of Satellite Communications. 19:251-262
The paper presents a general description of Doppler characteristics of the complex LEO satellite (low earth orbit) to ground terminal channel of S-PCS (satellite personal communication system). The difference between the terrestrial and satellite PCS
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1245980ab2e8d47f7dce715fb5741742
https://doi.org/10.1002/sat.685
https://doi.org/10.1002/sat.685
Akademický článek
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Publikováno v:
IEEE Communications Letters. 8:523-525
In this paper, we present an interleaver design method for SCCC. Our design criterion is to minimize the message-round probability in the SCCC graph which is specially well suited for SCCC. The message-round probability characterizes the message flow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d238cc7216edfa6d1f4ac14d5cfb3184
https://doi.org/10.1109/lcomm.2004.833788
https://doi.org/10.1109/lcomm.2004.833788
Evaluation of time-domain OCDMA performances using a Gaussian model for an optical amplified channel
Publikováno v:
Microwave and Optical Technology Letters. 41:463-465
The performances of time-domain optical code-division multiple access (OCDMA), using a Gaussian model for an optical amplified channel, are evaluated. Interest in spectral spreading to take advantage of low-cost optical filtering conditions is pointe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b80fc292d4eb992b14c1db49f2a99f0a
https://doi.org/10.1002/mop.20172
https://doi.org/10.1002/mop.20172
Publikováno v:
Journal of Lightwave Technology. 13:2258-2269
Modeling of the semiconductor laser nonuniform FM response and residual IM modulation is essential for the computer-aided design of coherent optical communication systems. This paper presents an accurate simulation model, in which the FM and IM respo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06bb5b976bfcbee01b643c18c297cc67
https://doi.org/10.1109/50.482046
https://doi.org/10.1109/50.482046
Autor:
Kais Haj Taieb, R. Vallet
Publikováno v:
Wireless Personal Communications. 2:97-103
This paper presents a digital implementation of a Multi-Carrier Modulation scheme without spectral overlapping between sub-carriers. This scheme uses aQAM modulation and a square root Nyquist pulse shaping function. It guarantees orthogonality betwee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a811dad6d0d7e50b96fc8f4d1df856e8
https://doi.org/10.1007/bf01099532
https://doi.org/10.1007/bf01099532
Autor:
R. Vallet, Ghassan Kawas Kaleh
Publikováno v:
IEEE Transactions on Communications. 42:2406-2413
We present an iterative method for joint channel parameter estimation and symbol selection via the Baum-Welch algorithm, or equivalently the Expectation-Maximization (EM) algorithm. Channel parameters, including noise variance, are estimated using a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92a43fe5c7e0dbdf3a258ae76c86fcac
https://doi.org/10.1109/26.297849
https://doi.org/10.1109/26.297849
Publikováno v:
2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666).
Optical code division multiple access (OCDMA) use appropriate optical codewords to multiplex data sequences. In this paper the effect of different optical components in optical fibre communication system are taken into account by an appropriate optic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::269013fc5b51f96e9ca7e593bdab7bc0
https://doi.org/10.1109/cleoe.2003.1313602
https://doi.org/10.1109/cleoe.2003.1313602