Results 291 to 300 of about 1,483,139 (351)

Frequency‐filtering zoom

International Journal of Adaptive Control and Signal Processing, 1992
AbstractSpectral component discrimination and the estimation of one or more signal frequencies are classical problems in signal processing. The purpose here is to study a new technique intended to increase the frequency resolution, called frequency‐filtering zoom (FFZ).
Zarader, Jean-Luc, Garnier, Michel, Nicollet, Michel   +2 more
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Parallel frequency filtering

Computing, 1997
Theory and practice of the frequency filtering domain decomposition (FFDD) method for the solution of a Poisson-like partial differential equation on a rectangular grid. Parallelization of the FF is obtained by the combination with DD and by a further recursive calculation of the coupling Schur complement.
Weiler, W., Wittum, G.
openaire   +1 more source

Subband frequency-domain filtering for filtered OFDM

Eleventh International Conference on Graphics and Image Processing (ICGIP 2019), 2020
The fifth generation (5G) cellular network is mainly used to meet the needs of mobile communication after 2020. Orthogonal Frequency Division Multiplexing (OFDM) is widely used in existing wireless communication systems, and filtered orthogonal frequency division multiplexing has been proposed.
Wei Zhang, Jingyao Chen, Mingyue Cao, Jicheng Dong   +3 more
openaire   +1 more source

Frequency-Tunable Tri-Function Filter

IEEE Transactions on Microwave Theory and Techniques, 2017
In this paper, we present a reconfigurable filter capable of having three different responses, such as bandstop, bandpass, and all-pass responses. For designing the tri-function filter, we have developed a new topology containing coupled resonators and a switch-embedded transmission line running from the input to output ports.
Tae-Hak Lee, Boyoung Lee, Seunggoo Nam, Young-Sik Kim, Juseop Lee   +4 more
openaire   +1 more source

Adaptive frequency shape Kalman filters

IEEE Transactions on Automatic Control, 1989
Kalman filters operating in colored process noise. Environments have frequency shaped gains. When the process noise environment is known and changing, then it is natural to use filters with adaptive frequency shaping. In this article one such least-squares based scheme which builds on the theory for the class of all stabilizing proper controllers for a
Moore, J. B., Tay, T. T.
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Frequency Domain Filtering

2021
Fourier transform can be used to transform the image into frequency domain space (Bracewell 1986; Russ and Neal 2016). Frequency domain filtering is an important method for image enhancement (Gonzalez and Woods 2008; Zhang 2017a).
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Frequency Filtering Techniques

2004
In this chapter, we outline the method of frequency filtering decomposition (FFD) proposed in [186] for the construction of factorized preconditioners for the systems of linear equations arising in usual FE conforming approximations for elliptic problems.
Boris N. Khoromskij, Gabriel Wittum
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Narrowband filtering with frequency sampling filters

ICASSP '81. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
A reduction on the number of multiplies per point is achieved for narrowband filtering when frequency sampling filters are used. Agarwal and Cooley [4] tabulated some optimal block size segments of long sequences when convolving them with a short sequence by FFT methods. In this paper we describe how, by using block lengths of twice the filter's length
A. Aliphas, A. Peterson
openaire   +1 more source