Tracking algorithms for the GPS C/A code with an interference rejection capability based on state estimation technique are considered. A swept tone jamming signal is modeled as an autoregressive (AR) process and estimated jointly with the timing delay. A novel Mean-Value Theorem Particle Filter (MVT-PF) is applied to address the highly nonlinear measurement model and its performance is compared...

periodic noises are unwished and spurious signals that create repetitive pattern on images and decreased the visual quality. firstly, this paper investigates various methods for reducing the effects of the periodic noise in digital images. then an adaptive optimum notch filter is proposed. in the proposed method, the regions of noise frequencies are determined by analyzing the spectral of noisy...

http://dx.doi.org/10.1590/1807-55092016000200279 Renato José SOARES Alex Sandra Oliveira de CERQUEIRA Luis MOCHIZUKI Júlio Cerca SERRÃO João Paulo VILAS-BOAS Alberto Carlos AMADIO * U n i v e r s i d a d e d e Taubaté, Taubaté, SP, Brasil. **Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, SP, Brasil. ***Escola de Educação Física e Esporte, Universidade de São Paul...

Recent molecular dynamic simulations and electrostatic calculations suggested that the external TEA binding site in K+ channels is outside the membrane electric field. However, it has been known for some time that external TEA block of Shaker K+ channels is voltage dependent. To reconcile these two results, we reexamined the voltage dependence of block of Shaker K+ channels by external TEA. We ...

The potassium channel from Streptomyces lividans is an integral membrane protein with sequence similarity to all known K+ channels, particularly in the pore region. X-ray analysis with data to 3.2 angstroms reveals that four identical subunits create an inverted teepee, or cone, cradling the selectivity filter of the pore in its outer end. The narrow selectivity filter is only 12 angstroms long...

This note calculates the requirements of the anti-aliasing filter for the read-out of the fluorescence detector of the AUGER experiment. The filter order and its cut-off frequency are related to the errors in area and timing reconstruction. 1 System transfert functions The Fluorescence Detector read-out channel consist of a current preamplifier followed by a low pass anti-aliasing filter and a ...