Programming of digital linear phase filter in ARMv8 architecture

Fourier‐Bessel theory is used to derive filters representing the influence of both empty and fluid‐filled cylindrical boreholes on particle motion induced in rock by a plane P-wave incident perpendicular to the borehole axis. For wavelengths greater than 10 times the borehole circumference, the effect of the borehole on particle motions is shown to be negligible; thus the results have little relevance for the long wavelengths commonly encountered in earthquake seismology. The results are, however, relevant to the study of stress wave propagation at ultrasonic frequencies in rock masses. For small wavelengths (αa > 3.0) the filter representing particle motion on the wave incident site of an empty borehole reduces to a linear phase filter which increases all amplitudes by a factor of 2 while the filter representing fluid stress at the center of a fluid‐filled borehole may be reduced to simple mathematical expressions. Experimental results were obtained for the interaction of a stress wave with either accelerometers mounted in an empty borehole or a hydrophone located centrally in a fluid‐filled borehole. Both theory and experiment show a similar distortion in the rise time of the pulse traveling past the borehole.

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Comparison between Discrete-Time Modified Repetitive Control System with Linear Phase Filter and Discrete-Time Modified Repetitive Control System with Corrected Dead Time for Their Control Characteristics

Transactions of the Society of Instrument and Control Engineers ◽

10.9746/sicetr1965.36.60 ◽

2000 ◽

Vol 36 (1) ◽

pp. 60-67 ◽

Cited By ~ 1

Author(s):

Hidehiko SUGIMOTO ◽

Kazuo WASHIDA

Keyword(s):

Control System ◽

Discrete Time ◽

Dead Time ◽

Repetitive Control ◽

Linear Phase ◽

Phase Filter

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Development of Integration HTSC Linear Phase Filter With External Equalization

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2013.2256353 ◽

2013 ◽

Vol 23 (4) ◽

pp. 1501805-1501805 ◽

Cited By ~ 10

Author(s):

Tianliang Zhang ◽

Kai Yang ◽

Zhengxiang Luo

Keyword(s):

Linear Phase ◽

Phase Filter

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Unequal Length First-Order Linear-Phase Filter Banks for Efficient Image Coding

2007 IEEE International Conference on Image Processing ◽

10.1109/icip.2007.4379982 ◽

2007 ◽

Cited By ~ 2

Author(s):

Yuichi Tanaka ◽

Masaaki Ikehara ◽

Truong Q. Nguyen

Keyword(s):

Image Coding ◽

Filter Banks ◽

Linear Phase ◽

Order Linear ◽

First Order ◽

Phase Filter ◽

Unequal Length

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A 2-v/sub pp/ 80-200-mhz fourth-order continuous-time linear phase filter with automatic frequency tuning

IEEE Journal of Solid-State Circuits ◽

10.1109/jssc.2003.817595 ◽

2003 ◽

Vol 38 (10) ◽

pp. 1745-1749 ◽

Cited By ~ 42

Author(s):

Mingdeng Chen ◽

J. Silva-Martinez ◽

S. Rokhsaz ◽

M. Robinson

Keyword(s):

Fourth Order ◽

Continuous Time ◽

Frequency Tuning ◽

Automatic Frequency ◽

Linear Phase ◽

Phase Filter ◽

Automatic Frequency Tuning ◽

Time Linear ◽

Order Continuous

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A Novel Configuration for Compact HTS CQ Structure Linear Phase Filter Design

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2018.2869796 ◽

2018 ◽

Vol 28 (8) ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

Liguo Zhou ◽

Zhihe Long ◽

Hui Li ◽

Tianliang Zhang ◽

Man Qiao

Keyword(s):

Filter Design ◽

Linear Phase ◽

Phase Filter

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Comb Filters Characteristics and Current Applications

Encyclopedia of Information Science and Technology, Fourth Edition ◽

10.4018/978-1-5225-2255-3.ch522 ◽

2018 ◽

pp. 6007-6018

Author(s):

Miriam Guadalupe Cruz-Jimenez ◽

David Ernesto Troncoso Romero ◽

Gordana Jovanovic Dolecek

Keyword(s):

Comb Filter ◽

Digital Audio ◽

Linear Phase ◽

Phase Filter ◽

Comb Filters ◽

Passband Droop

The comb filter is a very popular linear-phase filter due its simplicity, i.e. all its coefficients are equal to unity. As a consequence, it does not require multipliers or coefficients storage. This characteristic makes this filter attractive for many applications, as for example, in decimation, communications, digital audio, among others. However, the comb filter presents passband droop and a poor attenuation in the stopband region. In this proposal, the comb filter characteristics are reviewed and illustrated with one example. Additionally, the selected methods commonly used to improve the magnitude characteristics of a comb filter will be described and illustrated with examples.

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