The parameters design of 1-bit adaptive delta modulations (ADM) systems with uniform sampling rate is well known. Analytical study of delta modulations with sampling rate adaptation have been carried out few years ago. The described ADM systems encode the input signal by changing the sampling intervals and/or step size according to its time-varying slope characteristics. A proposition for desig...

This paper deals with the estimation of a function f defined on the sphere S of R from a sample of noisy observation points. We introduce an estimation procedure based on waveletlike functions on the sphere called needlets and study two estimators f and f respectively made adaptive through the use of a stochastic and deterministic needlet-shrinkage method. We show hereafter that these estimator...

The metaheuristic approach has become an important tool for the optimization of design in engineering. In that way, its application to the development of the plasmonic based biosensor is apparent. Plasmonics represents a rapidly expanding interdisciplinary field with numerous transducers for physical, biological and medicine applications. Specific problems are related to this domain. The plasmo...

Abstract In this paper, the design of non-uniform circular antenna arrays of isotropic radiators with optimum side lobe level reduction is investigated. Two global evolutionary optimization methods (namely; the biogeography based optimization and the self-adaptive differential evolution) are used to determine an optimum set of weights and positions that provide a radiation pattern with optimum ...

Robust optimization is concerned with constructing solutions that remain feasible also when a limited number of resources is removed from the solution. Most studies of robust combinatorial optimization to date made the assumption that every resource is equally vulnerable, and that the set of scenarios is implicitly given by a single budget constraint. This paper studies a robustness model of a ...

Automotive radars are designed to enhance road user safety and reduce the number of accidents on public roads there is a constant demand improve performance for these radars. In this paper, novel proof-of-concept multiple-input multiple-output (MIMO) radar architecture presented by frequency modulated continuous waveform (FMCW) transmission. For enhanced angular resolution, uses two-tier antenn...