In this paper a Rake finger grid structure for direct-sequence code division multiple access (DS-CDMA) systems is analyzed as an alternative to the conventional Rake structure using individual fingers with timingand phasor tracking. The grid uses a group of equispaced Rake fingers in the delay domain. Each of the Rake fingers uses linear minimum mean-squared error (LMMSE) tap weight estimation ...

Current grid technologies offer unlimited computational power and storage capacity for scientific research and business activities in heterogeneous areas all over the world. Thanks to the grid, different virtual organisations can operate together in order to achieve common goals. However, concrete use cases demand a closer interaction between various types of instruments accessible from the gri...

A Chebyshev or Fourier series may be evaluated on the standard collocation grid by the fast Fourier transform (FFT). Unfortunately, the FFT does not apply when one needs to sum a spectral series at N points which are spaced irregularly. The cost becomes O(N’) operations instead of the FFTs O(N log N). This sort of “off-grid” interpolation is needed by codes which dynamically readjust the grid e...

In this paper we show how ideas from spline theory can be used to construct a local basis for the space of translates general iterated Brownian Bridge kernel $k_{\beta,\varepsilon}$ $\beta\in\mathbb{N}$, $\varepsilon\geq 0$. simple case $\beta=1$, derive an explicit formula corresponding Lagrange basis, which allows us solve interpolation problems without inverting any linear system. We use pro...

Abstract We propose a new technique for consistent estimation of the number and locations change-points in structure an irregularly spaced time series. The core segmentation procedure is ensemble binary method (EBS), which large multiple change-point detection tasks using are applied on sub-samples data differing lengths, then results combined to create overall answer. do not restrict total ser...

Modern Grid systems use web services to interact with remote and distributed subsystem components to achieve an effective and common connection. Next generation Grid solutions will include instruments and sensors as part of the Grid, in addition to computational units (CE) and disk storage (SE). The Instrument Element (IE) is a new component that provides access to these remotely distributed pi...

This correspondence presents a new method for discrete representation of signals { g ( t ) , IE [ O , L ] , g e C*(O, L ) } consisting of a cascade having two stages: a) nonuniform sampling according to Chebyshev polynomial roots; and b) discrete cosine transform applied on the nonuniformly taken samples. We have proved that the considered signal samples and the coefficients of the correspondin...

Many of the processes involved in soil erosion have dimensions on the millimetre scale. Modelling and quantification of such processes require information on soil surface topography with adequate resolution. The purpose of this study was to generate digital elevation models (DEMs) from soil surfaces with high spatial and temporal resolution. Digital photogrammetry was applied for measuring eros...