136,163 research outputs found
GLRT-Based Direction Detectors in Homogeneous Noise and Subspace Interference
No full textIn this paper, we derive and assess decision schemes to discriminate, resorting to an array of sensors, between the H0 hypothesis that data under test contain disturbance only (i.e., noise plus interference) and the H1 hypothesis that they also contain signal components along a direction which is a priori unknown but constrained to belong to a given subspace of the observables. The disturbance is modeled in terms of complex normal random vectors plus deterministic interference assumed to belong to a known subspace. We assume that a set of noise-only (secondary) data is available, which possess the same statistical characterization of noise in the cells under test. At the design stage, we resort to either the plain generalized-likelihood ratio test (GLRT) or the two-step GLRT-based design procedure. The performance analysis, conducted resorting to simulated data, shows that the one-step GLRT performs better than the detector relying on the two-step design procedure when the number of secondary data is comparable to the number of sensors; moreover, it outperforms a one-step GLRT-based subspace detector when the dimension of the signal subspace is sufficiently high
Study of DsJ decays to D+KS0 and D0K+ final states in pp collisions
No full textA study of D+K0S and D0K+ final states is performed in a sample of 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of s√=7 TeV with the LHCb detector. We confirm the existence of the D∗s1(2700)+ and D∗sJ(2860)+ excited states and measure their masses and widths to be
m(D∗s1(2700)+) = 2709.2±1.9(stat)±4.5(syst) MeV/c2, Γ(D∗s1(2700)+) = 115.8±7.3(stat)±12.1(syst) MeV/c2, m(D∗sJ(2860)+) = 2866.1±1.0(stat)±6.3(syst) MeV/c2, Γ(D∗sJ(2860)+) = 69.9±3.2(stat)±6.6(syst) MeV/c2
An improved adaptive sidelobe blanker
No full textWe propose a two-stage detector consisting of a subspace
detector followed by the whitened adaptive beamformer orthogonal rejection test. The performance analysis shows that it possesses the constant false alarm rate property with respect to the unknown covariance matrix of the noise and that it can guarantee a wider range of directivity values with respect to previously proposed two-stage detectors. The probability of false alarm and the probability of detection (for both matched and mismatched signals) have been evaluated by means of numerical integration techniques
Compte rendu du Ve colloque de linguistique latine. Actes du Ve Colloque de linguistique latine/Proceedings of the V° Colloquium on Latin Linguistics, Louvain-La-Neuve/ Borzee, 31 mars - 4 avril 1989, édités par M. Lavency et D. Longrée, Cahiers de l'Institut de Linguistique de Louvain, 15. 1-4, Louvain-La-Neuve, 1989
No full textBesson G. Compte rendu du Ve colloque de linguistique latine. Actes du Ve Colloque de linguistique latine/Proceedings of the V° Colloquium on Latin Linguistics, Louvain-La-Neuve/ Borzee, 31 mars - 4 avril 1989, édités par M. Lavency et D. Longrée, Cahiers de l'Institut de Linguistique de Louvain, 15. 1-4, Louvain-La-Neuve, 1989. In: L'Information Grammaticale, N. 47, 1990. pp. 51-52
Compte rendu du Ve colloque de linguistique latine. Actes du Ve Colloque de linguistique latine/Proceedings of the V° Colloquium on Latin Linguistics, Louvain-La-Neuve/ Borzee, 31 mars - 4 avril 1989, édités par M. Lavency et D. Longrée, Cahiers de l'Institut de Linguistique de Louvain, 15. 1-4, Louvain-La-Neuve, 1989
No full textBesson G. Compte rendu du Ve colloque de linguistique latine. Actes du Ve Colloque de linguistique latine/Proceedings of the V° Colloquium on Latin Linguistics, Louvain-La-Neuve/ Borzee, 31 mars - 4 avril 1989, édités par M. Lavency et D. Longrée, Cahiers de l'Institut de Linguistique de Louvain, 15. 1-4, Louvain-La-Neuve, 1989. In: L'Information Grammaticale, N. 47, 1990. pp. 51-52
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