Topic
Bessel filter
About: Bessel filter is a research topic. Over the lifetime, 656 publications have been published within this topic receiving 16808 citations.
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Posted Content•
TL;DR: In this article, discrete analogs of the index transforms, involving Bessel and the modified Bessel functions, are introduced and investigated, and corresponding inversion theorems for suitable classes of functions and sequences are established.
Abstract: Discrete analogs of the index transforms, involving Bessel and the modified Bessel functions are introduced and investigated. The corresponding inversion theorems for suitable classes of functions and sequences are established.
TL;DR: In this paper, the design technique for a recursive digital filter with a maximally flat group delay at an arbitrary specified frequency is known, and it is shown that the filter coefficients for high-pass and band-elimination recursive digital filters with a group delay can be expressed in closed forms.
Abstract: The design technique for a recursive digital filter with a maximally flat group delay at an arbitrary specified frequency is known. It is shown here that, for certain cases, the filter coefficients for high-pass and band-elimination recursive digital filters with a maximally flat group delay can be expressed in closed forms.
Patent•
14 Jun 1999
TL;DR: In this paper, a phase shifter network consisting of N number of all-pass filters and a low-pass bessel filter is proposed to demodulate a frequency-modulated signal.
Abstract: An approach for demodulating a frequency-modulated signal involves processing a frequency-modulated signal with a phase shifter network to provide a demodulated signal that has a relatively constant amplitude around the center frequency of the frequency-modulated signal and that exhibits a relatively linear phase change over an operational frequency range. Embodiments of the invention include a phase shifter network comprising N number of all-pass filters and a phase shifter network comprising a low-pass bessel filter.
01 Dec 2017
TL;DR: The paper analyzes the influence of the Bessel filter frequency characteristics on the efficiency of the DCT trigger.
Abstract: The standard triggers T1 and ToT for the surface detectors of the Pierre Auger Observatory based on 3-fold (T1) or 2-fold (ToT) coincidences in the time domain The Discrete Cosine Transform (DCT) algorithm implemented as 3 engines for 3 PMT channels implemented into the surface detector Front-End Board (FEB) FPGA analyzes online shapes of the signal waveforms (ADC traces) and generates a trigger if selected number (7–9) of sub-triggers (as scaled DCT[k]/DCT[1]) are “fired” in at least two channels simultaneously For assumed sampling frequency f S = 120 MHz, the filter is built from RLC components on relatively small values Resistors and inductors are available in 01 % and 5 % tolerance, however, capacitors in pF range are available even in 01 pF, but the parasitic capacitance on the FEB can dramatically change the frequency characteristics Daily temperature variations reach even 40 ° C, which additionally change the characteristic of the analog FEB section The paper analyzes the influence of the Bessel filter frequency characteristics on the efficiency of the DCT trigger
01 Jan 2011
TL;DR: In this paper, both the Butterworth and Bessel filters are compared to see if the linear phase attribute of the Bessel filter causes any changes in the Pseudo Velocity Shock Spectrum (PVSS).
Abstract: The plateau of the Pseudo Velocity Shock Spectrum (PVSS) plotted on Four Coordinate Paper (4CP) shows the severe frequency range of the shock. Peak modal stress is proportional to PV [1, 2, 3, 4]; hence filtering effects can be quantified according to changes in the plateau. Maximum acceleration usually defines the high frequency extent of the plateau and low pass filtering reduces the peak acceleration levels of shock data. Thus low pass filtering hides the high frequency content of the shock in the shock analysis. This is demonstrated in both the time history as well as the PVSS. Both Butterworth and Bessel filters are compared to try and see if the linear phase attribute of the Bessel filter causes any changes in the PVSS.