This paper proposes a smart design strategy for a sequential detector to reliably detect the primary user’s signal, especially in fast fading environments. We study the computation of the log-likelihood ratio for coping with a fast changing received signal and noise sample variances, which are considered random variables. First, we analyze the detectability of the conventional generalized log-l...

1 Networks of binary neurons 3 1.1 Stochastic binary neurons and networks . . . . . . . . . . . . . . 3 1.1.1 Parallel dynamics: Little model . . . . . . . . . . . . . . 5 1.1.2 Sequential dynamics . . . . . . . . . . . . . . . . . . . . 5 1.2 Some properties of Markov processes . . . . . . . . . . . . . . . 6 1.2.1 Eigenvalue spectrum of T . . . . . . . . . . . . . . . . . 6 1.2.2 Ergodicity a...

The sequential testing of more than two hypotheses has important applications in direct-sequence spread spectrum signal acquisition, multiple-resolution-element radar, and other areas. A useful sequential test which we term the MSPRT is studied in this paper. The test is shown to be a generalization of the Sequential Probability Ratio Test. Under Bayesian assumptions, it is argued that the MSPR...

Variable dwell-time code acquisition based on multiple-dwell or sequential linear tests is investigated for direct-sequence spread-spectrum systems on time-variant Rayleigh fading channels. Not like in the conventional additive white Gaussian noise channels, the channel memory incurred by fading renders the exact analysis of the acquisition systems extremely difficult, if not impossible. In thi...

A transferable plasmid encoding SHV-12 extended-spectrum beta-lactamase, TEM-116, and aminoglycoside resistance was responsible for two sequential clonal outbreaks of Enterobacter cloacae and Acinetobacter baumannii bacteria. A similar plasmid was present among isolates of four different bacterial species. Recognition of plasmid transfer is crucial for control of outbreaks of multidrug-resistan...

We report single-molecule-transistor measurements on devices incorporating magnetic molecules. By studying the electron-tunneling spectrum as a function of magnetic field, we are able to identify signatures of magnetic states and their associated magnetic anisotropy. A comparison of the data to simulations also suggests that sequential electron tunneling may enhance the magnetic relaxation of t...

This paper overviews clock design problems related to the circuit reliability in deep submicron design technology. The topics include the clock polarity assignment problem for reducing peak power/ground noise, clock mesh network design problem for tolerating clock delay variation, electromagnetic interference aware clock optimization problem, adjustable delay buffer allocation and assignment pr...

2 Networks of binary neurons 5 2.1 Neural information processing is noisy . . . . . . . . . . . . . 5 2.2 Stochastic binary neurons and networks . . . . . . . . . . . . . 11 2.2.1 Parallel dynamics: Little model . . . . . . . . . . . . . 13 2.2.2 Sequential dynamics . . . . . . . . . . . . . . . . . . . 13 2.3 Some properties of Markov processes . . . . . . . . . . . . . . 14 2.3.1 Eigenvalue s...

Spectrum scarcity due to inefficient utilisation has ignited a plethora of dynamic spectrum access solutions to accommodate the expanding demand for future wireless networks. Dynamic spectrum access systems allow secondary users to utilise spectrum bands owned by primary users if the resulting interference is kept below a pre-designated threshold. Primary and secondary user spectrum occupancy p...

PURPOSE To compare abilities of imitating generic and sequential motion gesture schemes in family routines among children with Autism Spectrum Disorder (ASD) and Specific Language Impairment (SLI) and to analyze the relation between imitation index and verbal production in the ASD group. METHODS The sample was constituted by 2:1 pairing of 36 children, according to gender and age. All of them...