Optimization of the spectral signal processing for narrow‐band stochastic acoustic signals

1996 ◽  
Vol 100 (4) ◽  
pp. 2832-2832
Author(s):  
Leonid M. Gelman ◽  
Yuri V. Burau ◽  
Vladimir I. Krytsyn
Keyword(s):  
Signal Processing ◽  
Narrow Band ◽  
Acoustic Signals ◽  
Spectral Signal

A High Efficient Baseband GNSS Signal Narrow Band Anti-Jamming Approach in Frequency Domain

2014 ◽  
Vol 926-930 ◽  
pp. 1857-1860
Author(s):  
Zhou Zheng ◽  
Meng Yuan Li ◽  
Wei Jiang Wang
Keyword(s):  
Signal Processing ◽  
Frequency Domain ◽  
Narrow Band ◽  
Low Frequency ◽  
Frequency Resolution ◽  
Interference Rejection ◽  
High Efficient ◽  
Digital Down Conversion ◽  
Down Conversion ◽  
Low Rate

In order to reduce the burden of the calculation and the low frequency resolution of the tradition GNSS signal intermediate narrow band anti-jamming method, it introduces a high efficient approach of narrow band interference rejection based on baseband GNSS signal processing. After digital down conversion to baseband and down sampling to a low rate, the interference is removed in frequency domain. According to the theoretical analysis and simulation, it claims that the method can reduce the calculation and increase the detection resolution in frequency domain which will realize a high efficient interference rejection.

scholarly journals Combination of HP and LP filters for narrow band antialiasing filter

2021 ◽  
Vol 72 (4) ◽  
pp. 283-286
Author(s):  
Bohumil Brtník
Keyword(s):  
Signal Processing ◽  
Discrete Time ◽  
Operational Amplifier ◽  
Narrow Band ◽  
Time Signal ◽  
Spice Simulation ◽  
Output Resistance ◽  
High Frequencies ◽  
Filter Structure ◽  
Reconstruction Filter

Abstract The discrete time signal processing requires an anti-aliasing filter at the input and a reconstruction filter at output. Some filters of biquads structure are characterized by a decreasing of the attenuation at high frequencies, caused by the final value of the output resistance of the operational amplifier. In this paper we discuss a design of combined BP filter without mentioned decrease. The proposed filter structure was verified by SPICE simulation.

scholarly journals Acoustic Signal Attenuation Determination Technique Traveling Through Obstacles

2019 ◽  
Vol 8 (3) ◽  
pp. 2012-2016
Keyword(s):  
Signal Processing ◽  
Acoustic Signal ◽  
Acoustic Signals ◽  
Signal Frequency ◽  
Signal Attenuation ◽  
Laboratory Procedure ◽  
Novel Technique ◽  
Sonar Signal Processing ◽  
Launch Angle

This paper presents a novel technique for calculation of attenuation of acoustic signals in the materials in underwater channel. A laboratory procedure and algorithms have been developed for finding attenuation. In many applications like sonar signal processing acoustic signal attenuation in the dome or in an enclosure are required to be known. Finding the actual attenuation while signal passes through the materials is very useful in calculating the precise power transmitted through the enclosures. The attenuation in materials mainly dependent on type of material, signal frequency and launch angle of the signal. A proper procedure has been presented in this paper

Spectral signal processing for tiny optical pieces

2010 ◽  
Author(s):  
Aurelian Ovidius I. Trufasu ◽  
Georgeta Sorohan ◽  
Danut Ursu ◽  
Cristina Liliana Trufasu
Keyword(s):  
Signal Processing ◽  
Spectral Signal

Relationships between acoustic reflex patterns elicited by unfiltered white noise and narrow band white noise stimuli of different duration but of the same intensity

1985 ◽  
Vol 99 (9) ◽  
pp. 857-863 ◽  
Author(s):  
Giovanni Rossi ◽  
Paolo Solero ◽  
M. Rolando
Keyword(s):  
White Noise ◽  
Narrow Band ◽  
Acoustic Signals ◽  
The Other ◽  
Acoustic Reflex ◽  
Other Hand ◽  
Recruitment Time

AbstractFor the purpose of this study, acoustic signals were generated by an Amplaid MK VI. An Amplaid 702 impedence meter was connected to its averaging section and to its computer. The stimuli were bursts of unfiltered white noise (UWN) and of narrow band white noise (NBWN; 30 db./oct/slope; central frequencies 1,000, 2,000, 4,000 Hz.) lasting 3–1,000 msec, at intensity of 105 db. SPL p.e. The following parameters were evaluated: stapedius contraction latency, amplitude, duration and recruitment time. It was found that latency was independent of the spectrum of the stimulus and its duration. Amplitude and recruitment time, on the other hand, were related to spectrum and duration, while duration of contraction was directly related to the duration of the stimulus only.

Fatigue-Seismic Ratcheting Interactions in Pressurized Elbows

1994 ◽  
Vol 116 (4) ◽  
pp. 396-402 ◽  
Author(s):  
Dj. Boussaa ◽  
K. Dang Van ◽  
P. Labbe´ ◽  
H. T. Tang
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Signal Processing ◽  
Failure Mode ◽  
Narrow Band ◽  
Great Sensitivity ◽  
Cumulative Damage ◽  
Dynamic Tests ◽  
Cyclic Part ◽  
Elementary Signal

Three dynamic tests on pressurized elbows involving fatigue-ratcheting as the major failure mode are investigated. The fatigue analysis is carried out with two approaches: the first is global and consists of Markl’s equation; the second is local and is based on local fatigue criteria combined with a suggestion by Coffin to take ratcheting into account. The implementation of these approaches required some elementary signal processing to separate the cyclic part of the strain from ratcheting. Results on narrow-band processes were used to assess cumulative damage. Finite element computations extended the data into uninstrumented locations. The great sensitivity of the implemented criteria to their arguments is discussed and exemplified. Despite the complexities of the issue, computed results match well with the experimental data.

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