Zobrazeno 1 - 10
of 50
pro vyhledávání: '"R.A. Casas"'
Publikováno v:
Automatica. 38:1753-1760
Prediction error methods are considered for identification of the forward linear dynamics of nonlinear feedback closed-loop systems which operate in a perturbed stable limit cycle. A model of the signals measured in a neighborhood of the limit cycle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df356352ac25e05fddd58d65300c024e
https://doi.org/10.1016/s0005-1098(02)00085-7
https://doi.org/10.1016/s0005-1098(02)00085-7
Publikováno v:
IEEE Signal Processing Letters. 7:31-33
The vector-constant modulus (VCM) criterion is an extension of the constant modulus (CM) criterion introduced recently for equalization of channels involving Gaussian sources. In this letter, we analyze the behavior of VCM for arbitrary source distri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cca88367ba44d8790af216d7643c8ef2
https://doi.org/10.1109/97.817379
https://doi.org/10.1109/97.817379
Publikováno v:
Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002..
We introduce an algorithm for compensating for carrier phase noise in an OFDM communication system. Through the creation of a linearized parametric model for phase noise, we generate a least squares (LS) estimate of the transmitted symbol. Using digi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8839edb81d860f9c79123e2ce3f0631e
https://doi.org/10.1109/acssc.2002.1197092
https://doi.org/10.1109/acssc.2002.1197092
Publikováno v:
Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020).
The vector-constant modulus (VCM) criterion is an extension of the constant modulus (CM) criterion introduced previously for equalization of channels involving Gaussian sources. We analyze the behavior of VCM for arbitrary source distributions and co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53342a640215abe8e0a25b746eae90cd
https://doi.org/10.1109/acssc.1999.832009
https://doi.org/10.1109/acssc.1999.832009
Publikováno v:
WCNC
We consider a generic blind adaptive DFE initialization strategy which begins with blind adaptation of a linear structure minimizing MSE followed by a switch to decision-direction under the nonlinear DFE structure. We show that this very natural sche
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de582918d465513c1bac836b22e798e6
https://doi.org/10.1109/wcnc.1999.796762
https://doi.org/10.1109/wcnc.1999.796762
Publikováno v:
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304).
This paper analytically compares, in terms of the convergence time, fast least squares estimation algorithms for channel identification and equalization to looping LMS (LLMS), a scheme which repeatedly applies the least mean squares algorithm to a bl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::863177f6d47939cd644463b35763a190
https://doi.org/10.1109/spawc.1999.783077
https://doi.org/10.1109/spawc.1999.783077
Publikováno v:
Proceedings of 13th International Conference on Digital Signal Processing.
This paper adds analytical tools to an evolving theory on fractionally-spaced equalizer (FSE) design. It examines the minimum mean square error design (MMSE-FSE) for channels perturbed by additive noise in two scenarios: when the equalizer is finite,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4349d29aeb54b13aa4e3cb9a289a6d9
https://doi.org/10.1109/icdsp.1997.628122
https://doi.org/10.1109/icdsp.1997.628122
Autor:
Chris R. Johnson, R.A. Casas
Publikováno v:
First IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications.
This paper shows that a fractionally-spaced equalizer (FSE) and decision feedback equalizer (DFE) combination, initialized from an open-eye condition, jointly adapted by a decision-directed algorithm, and in the absence of noise, is guaranteed to con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::083d5bfa85f2dd91ed10a98887591e24
https://doi.org/10.1109/spawc.1997.630161
https://doi.org/10.1109/spawc.1997.630161
Autor:
Chris R. Johnson, T.J. Endres, R.A. Casas, Z. Reznic, W.E. Meyer, H.J. Lee, J.P. LeBlanc, E. Tai
Publikováno v:
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers.
Advances in blind identification of fractionally-spaced models for digital communication channels and blind fractionally-spaced equalizer adaptation rely on the assumption that the time span chosen for the fractionally-spaced equalizer exceeds that o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2c290c166e05640a99483288266508f
https://doi.org/10.1109/acssc.1995.540558
https://doi.org/10.1109/acssc.1995.540558
Publikováno v:
ICASSP
Bussgang algorithms are a class of simple stochastic gradient type solutions for blind channel equalization. We investigate the degradation of performance in the source estimation resulting from the stochastic jitter around stationary points of Bussg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42e5ec5897d3ff26da387311f21b6673
https://doi.org/10.1109/icassp.2001.940404
https://doi.org/10.1109/icassp.2001.940404