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Titolo:
On the performance of semi-blind subspace-based channel estimation
Autore:
Buchoux, V; Cappe, O; Moulines, E; Gorokhov, A;
Indirizzi:
Ecole Natl Super Telecommun, Image & Signal Proc Dept, Paris, France EcoleNatl Super Telecommun Paris France ignal Proc Dept, Paris, France
Titolo Testata:
IEEE TRANSACTIONS ON SIGNAL PROCESSING
fascicolo: 6, volume: 48, anno: 2000,
pagine: 1750 - 1759
SICI:
1053-587X(200006)48:6<1750:OTPOSS>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAXIMUM-LIKELIHOOD METHODS; IDENTIFICATION;
Keywords:
asymptotic analysis; BER performance; semi-blind equalization; subspace estimation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Buchoux, V Ecole Natl Super Telecommun, Image & Signal Proc Dept, Paris, France Ecole Natl Super Telecommun Paris France Dept, Paris, France
Citazione:
V. Buchoux et al., "On the performance of semi-blind subspace-based channel estimation", IEEE SIGNAL, 48(6), 2000, pp. 1750-1759

Abstract

This paper is devoted to the analysis of a "semi-blind" estimation framework in which the standard least-squares estimator (based on a known trainingsequence) is enhanced by using the statistical structure of the observations. More specifically, we consider the case of a general time-division multiple access (TDMA) frame-based receiver equipped with multiple sensor and restrict our attention to second-order based subspace methods that are suitable for most standard communication applications due to their moderate computational cost. The semi-blind channel estimator is obtained as a regularized least-squares solution where a blind subspace criterion plays the role of the regularization constraint. The main contribution of the paper consists of showing by asymptotic analysis hen; to optimally tune the balance between the blind criterion and the least-squares fit, depending on the design parameters of the system. Simulations show that the proposed solutions are robust and significantly improve the efficiency of the equalization.

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Documento generato il 09/07/20 alle ore 23:22:57