نتایج جستجو برای: classical wavelet systems
تعداد نتایج: 1374956 فیلتر نتایج به سال:
Speckle is a granular noise-like phenomenon which appears in Synthetic Aperture Radar (SAR) images due to coherent properties of SAR systems. The presence of speckle complicates both human and automatic analysis of SAR images. As a result, speckle reduction is an important preprocessing step for many SAR remote sensing applications. Speckle reduction can be made through multi-looking during the...
Generalized span categories provide a framework for formalizing mathematical models of open systems in classical mechanics. We introduce LagSy and HamSy that, respectively, categorical the Lagrangian Hamiltonian descriptions mechanical systems. The morphisms correspond to such systems, composition construction from subsystems. Legendre transformation gives rise functor that translates perspecti...
Orthogonal frequency division multiplexing (OFDM) is used in order to provide immunity against very hostile multipath channels in many modern communication systems.. The OFDM technique divides the total available frequency bandwidth into several narrow bands. In conventional OFDM, FFT algorithm is used to provide orthogonal subcarriers. Intersymbol interference (ISI) and intercarrier interferen...
The work is devoted to the experimental comparison of accuracy classification methods on problem pattern recognition in images using wavelet analysis technologies and without. In particular, interaction ring-projection wavelet-fractal method for identifying features with classical such as "Naive Bayes classifier" "Support vector machines" investigated. test results are given form a table. As re...
Recent studies suggest that multicarrier systems using wavelets outperform conventional OFDM systems using the FFT, in that they have well-contained side lobes, improved spectral efficiency and BER performance, and they do not require a cyclic prefix. Here we study the wavelet packet and discrete wavelet transforms, comparing the BER performance of wavelet transform-based multicarrier systems a...
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