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Relevant bibliographies by topics / Signal-to-noise ratio wall

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Academic literature on the topic 'Signal-to-noise ratio wall'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Signal-to-noise ratio wall"

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He, Di, Xin Chen, Ling Pei, Lingge Jiang, and Wenxian Yu. "Improvement of Noise Uncertainty and Signal-To-Noise Ratio Wall in Spectrum Sensing Based on Optimal Stochastic Resonance." Sensors 19, no. 4 (2019): 841. http://dx.doi.org/10.3390/s19040841.

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Noise uncertainty and signal-to-noise ratio (SNR) wall are two very serious problems in spectrum sensing of cognitive radio (CR) networks, which restrict the applications of some conventional spectrum sensing methods especially under low SNR circumstances. In this study, an optimal dynamic stochastic resonance (SR) processing method is introduced to improve the SNR of the receiving signal under certain conditions. By using the proposed method, the SNR wall can be enhanced and the sampling complexity can be reduced, accordingly the noise uncertainty of the received signal can also be decreased.

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Costa, Lucas Dos Santos, Dayan Adionel Guimaraes, and Bartolomeu F. Uchoa-Filho. "On the Signal-to-Noise Ratio Wall of Energy Detection in Spectrum Sensing." IEEE Access 10 (2022): 16499–511. http://dx.doi.org/10.1109/access.2022.3149476.

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Mohsin Riaz, Muhammad, and Abdul Ghafoor. "Through-Wall Image Enhancement Based on Singular Value Decomposition." International Journal of Antennas and Propagation 2012 (2012): 1–20. http://dx.doi.org/10.1155/2012/961829.

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Singular value decomposition and information theoretic criterion-based image enhancement is proposed for through-wall imaging. The scheme is capable of discriminating target, clutter, and noise subspaces. Information theoretic criterion is used with conventional singular value decomposition to find number of target singular values. Furthermore, wavelet transform-based denoising is performed (to further suppress noise signals) by estimating noise variance. Proposed scheme works also for extracting multiple targets in heavy cluttered through-wall images. Simulation results are compared on the ba

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Skryl, S. V., M. V. Murashov, E. S. Golubtsova, J. V. Gracheva, and M. A. Parotkina. "Computer simulation of the protection of a room from information leakage through a vibroacoustic channel." Scientific and Technical Journal of Information Technologies, Mechanics and Optics 25, no. 2 (2025): 354–61. https://doi.org/10.17586/2226-1494-2025-25-2-354-361.

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The quality of application of active means of information protection against leakage via vibroacoustic channel is traditionally assessed by the measured value of signal-to-noise ratio. In this case, measurements are taken at several control points to check the security, while the sample size is relatively small, and the measurement process is laborintensive. Based on the studies previously conducted by the authors of the article and modeling of acoustic wave propagation in the protected room, this paper proposes to calculate speech intelligibility at each point of the external enclosing surfac

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Liu, Jin, and Zan Li. "Lowering the signal-to-noise ratio wall for energy detection using parameter-induced stochastic resonator." IET Communications 9, no. 1 (2015): 101–7. http://dx.doi.org/10.1049/iet-com.2014.0511.

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Kapoor, Rajiv, Rashmi Gupta, Le Hoang Son, Sudan Jha, and Raghvendra Kumar. "Adaptive Technique with Cross Correlation for Lowering Signal-to-Noise Ratio Wall in Sensor Networks." Wireless Personal Communications 105, no. 3 (2019): 787–802. http://dx.doi.org/10.1007/s11277-019-06121-7.

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Liang, Xiao, Shengbo Ye, Chenyang Song, Qingyang Kong, Xiaojun Liu, and Guangyou Fang. "Enhancement of Vital Signals for UWB Through-Wall Radar Using Low-Rank and Block-Sparse Matrix Decomposition." Remote Sensing 16, no. 4 (2024): 620. http://dx.doi.org/10.3390/rs16040620.

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Ultra-wideband (UWB) vital detection radar plays an important role in post-disaster search and rescue, but the vital signal acquired in practice is often submerged in noise. In this paper, an advanced signal processing algorithm based on low-rank block-sparse representation is proposed to enhance the vital signal in life detection radar applications. The preprocessed echo signal can be decomposed into low-rank and block-sparse parts. The alternate direction method (ADM) is employed to obtain the block-sparse part containing the desired vital signal. We solve the subproblems involved in the ADM

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Campos, Luiz Manuel Braga da Costa, Manuel José dos Santos Silva, and Agostinho Rui Alves da Fonseca. "On the multipath effects due to wall reflections for wave reception in a corner." Noise Mapping 8, no. 1 (2021): 41–64. http://dx.doi.org/10.1515/noise-2021-0004.

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Abstract Multipath effects occur when receiving a wave near a corner, for example, the noise of an helicopter or an aircraft or a drone or other forms of urban air mobility near a building, or a telecommunications receiver antenna near an obstacle. The total signal received in a corner consists of four parts: (i) a direct signal from source to observer; (ii) a second signal reflected on the ground; (iii) a third signal reflected on the wall; (iv) a fourth signal reflected from both wall and ground. The problem is solved in two-dimensions to specify the total signal, whose ratio to the direct s

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Sikula, Josef, J. Majzner, P. Sedlak, and Yasuhiko Mori. "Electromagnetic and Acoustic Emission Fine Spectra." Advanced Materials Research 13-14 (February 2006): 169–74. http://dx.doi.org/10.4028/www.scientific.net/amr.13-14.169.

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A new measuring method for the detection of fine spectra of electromagnetic and acoustic emission (EME and AE) signals from small cracks is described. It requires wide band ultra-low noise amplifiers, analogue filters, the optimization of signal to noise ratio of sensors and the application of noise elimination methods. Analyses of noise sources in sensors and preamplifiers are given. They are thermal noise, polarization noise and low frequency 1/f noise. Measuring set-up background noise suppression involving also the electromagnetic shielding allows us to detect signals in the range of 1 to

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Li, Xinhui, Shengbo Ye, Zihao Wang, et al. "A Compact Stepped Frequency Continuous Waveform Through-Wall Radar System Based on Dual-Channel Software-Defined Radio." Electronics 14, no. 3 (2025): 527. https://doi.org/10.3390/electronics14030527.

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Software-defined radio (SDR) has high flexibility and low cost. It conforms to the miniaturization, lightweight, and digitization trends in through-wall radar systems. Stepped frequency continuous waveform (SFCW) is commonly used in through-wall radar, which has high resolution and strong anti-interference ability. This article develops an SFCW through-wall radar system based on a dual-channel SDR platform. Without changing hardware structure and complicated accessories, a phase compensation method of solving the phase incoherence problem in a low-cost dual-channel SDR platform is proposed. In

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Dissertations / Theses on the topic "Signal-to-noise ratio wall"

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Yu-Jian, Lin. "The Wald Test for Testing Adjusted Noise-to-Signal Ratio." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2607200614460500.

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Book chapters on the topic "Signal-to-noise ratio wall"

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Wang, Ruonan, Yong Li, Qianxiang Gao, Yang Fang, and Zhenmao Chen. "Imaging and Evaluation of Wall-Thinning Defects in GFRP via Cross-Polarization Microwave Reflectometry." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2025. https://doi.org/10.3233/saem250005.

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The wall-thinning defect is one of the critical flaws that have been posing a severe threat to the structural integrity of Glass Fibre Reinforced Polymer (GFRP) employed in the hostile environment. In this paper, a sweep-frequency microwave testing method based on Cross-polarization Microwave Reflectometry (CMR) is proposed for detection and imaging of subsurface wall-thinning defects in the unidirectional GFRP. The simulation model of CMR is established along with the scrutinization of the characteristics regarding the testing signal in Ka band (26.5 GHz∼40 GHz). In experiments, a microwave t

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Bu, Tianlong, Yongguang Wang, Dapei Zhang, Hanpeng Kou, Xuefeng Chen, and Yuxin Yang. "Laser Fiber Double Mach-Zehnder Sensor Cable Vibration Monitoring System." In Advances in Transdisciplinary Engineering. IOS Press, 2025. https://doi.org/10.3233/atde241392.

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Natural disasters Gale weather or cable icing will cause irregular vibration of the cable, which will cause potential harm to the safety of the power tower and the strength of the cable structure. The two-end fiber Mach-Zehnder optical path technology is used to develop the cable vibration sensor to realize long-distance, large-scale and multi-dimensional online monitoring and structural safety early warning. The detector is constructed with thin-wall sensitized cable sleeve, and the laser fiber Mach-Zehnder coherent optical path is built with high-sensitivity fine fiber and coupler. The Mach-

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Conference papers on the topic "Signal-to-noise ratio wall"

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Gopalan, Shridhar, Bruce Abraham, and Joseph Katz. "Turbulent Jet Injected Into a Cross Flow: Analysis of the Flow Structure and Wall Pressure Fluctuations." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31420.

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The objective of this study is to characterize the velocity, vorticity, wall pressure fluctuations and resulting structural vibrations caused by injection of a round, turbulent jet into a turbulent boundary layer. The experiments are performed in a quiet water channel with back ground noise well below the local pressure fluctuations. One of the channel walls is replaced by a vibration isolated, 1m long, aluminum plate from which the 1cm-diameter jet is injected. The cross flow velocity is fixed at 2 m/s and the velocity ratio, r (ratio of mean jet velocity to the cross flow), varies from 0.5 t

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Désor, Marcel, Matthias Haeringer, Marian Hiestermann, Korbinian Niebler, Camilo F. Silva, and Wolfgang Polifke. "Application of an Improved Workflow for the Identification of Flame Dynamics to Swirl Stabilized Wet Combustion." In ASME Turbo Expo 2024: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/gt2024-125057.

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Abstract The estimation of a flame transfer function (FTF)from time series data generated by large eddy simulation (LES) via system identification (SI) is an established and important element of thermoacoustic analysis. To achieve results with low uncertainties, continuous (non-truncated) time series of adequate length are required. This can be a challenge in the case of turbulent flames, where signal-to-noise ratio may be low. Because LES codes do not scale to an arbitrarily high degree of parallelism, the wall-clock-time required for confident FTF estimation may be excessive. The present pap

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Giurgiutiu, Victor, and Jingjing Bao. "Embedded-Ultrasonics Structural Radar for Nondestructive Evaluation of Thin-Wall Structures." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39017.

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Embedded-Ultrasonics Structural Radar (EUSR) is a new concept and methodology for in-situ nondestructive evaluation (NDE) of thin-wall structures. EUSR utilizes (a) a Piezo Wafer Active Sensors (PWAS) array embedded onto the structure; and (b) electronic modules for signal transmission/reception, processing, and interpretation. The EUSR methodology is developed as an extension of our previous work on the Lamb wave propagation NDE. Based on the study of the Lamb wave characteristic, the excitation signal is optimized to obtain good signal to noise ratio. Lamb wave speed-frequency curve is plott

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Gopalan, Shridhar, Bruce M. Abraham, and Joseph Katz. "Flow Structure, Pressure Fluctuations and Resulting Vibrations Caused by the Interaction of a Turbulent Jet With Cross Flow Over a Flexible Flat Plate." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32225.

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The objective of this study is to characterize the velocity, vorticity, wall pressure fluctuations and resulting structural vibrations caused by injection of a round, turbulent jet into a turbulent boundary layer. The experiments are performed in a quiet water channel with back ground noise well below the local pressure fluctuations. One of the channel walls is replaced by a vibration isolated, 1m long, aluminum plate from which the 1cm-diameter jet is injected. The cross flow velocity is fixed at 2 m/s and the velocity ratio, r (ratio of mean jet velocity to the cross flow), varies from 0.5 t

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Shi, Yan, Yangji Tao, Zitao Shen, et al. "Study on Industrial Computed Tomography Detection and Identification of Inclusion Defects in Thick-Wall Polyethylene Pipe Butt Fusion Joint Within Nuclear Power Plant." In ASME 2024 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/pvp2024-122933.

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Abstract High-density polyethylene pipe exhibits notable corrosion resistance and mechanical properties, and has been applied in nuclear power plants. Due to operational efficiency and safety considerations, polyethylene pipe used in nuclear power plant generally features considerable wall thickness, which poses a huge challenge for radiographic non-destructive testing of the embedded defects. In this study, the effects of X-ray source tube voltage, the number of digital radiography image merging, and the number of scanning frames utilized for three-dimensional computed tomography image recons

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Etebari, A., M. D. Bennett, D. J. Leo, and P. P. Vlachos. "A Dynamic Wall Shear Stress Sensor Based on Ionic Polymers." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77484.

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This paper presents the first implementation of a novel class of dynamic time-resolved direct skin friction measurements sensor based on active ionic polymer transducers. These ionic polymer sensors have the advantage that they contain no moving parts, perform a direct measurement of shear, and can be mounted directly to the surface of an existing vessel with no modification. During the present effort we characterize the accuracy of the sensors and validate their dynamic measurement response. Using an oscillating Stokes layer calibration procedure we demonstrate measurement accuracy in fluctua

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Pusch, Tim P., Mario D’Auria, Nima Tolou, and Andrew S. Holmes. "Laser Micromachining of Thin Beams for Silicon MEMS: Optimization of Cutting Parameters Using the Taguchi Method." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-48100.

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While thin beams are widely used structural elements in Micro-Electro-Mechanical-Systems (MEMS) there are very few studies investigating the laser machining of clean high aspect ratio silicon beams. This work presents a systematic study of selected influencing cutting parameters with the goal of machining high aspect ratio beams with low side wall surface roughness (Ra) and high cross section verticality, i.e. low taper angle. The Taguchi method was used to find the optimal setting for each of the selected parameters (pulse frequency, laser diode current, pulse overlap, number of patterns to b

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Sandu, Laurentiu I., Felicia Stan, and Catalin Fetecau. "Correlation Between Mechanical Properties in Standard Test Specimens and Injection Molded Thin-Wall Parts." In ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1032.

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In this paper, we investigated the effect of injection molding parameters on the mechanical properties of thin-wall injection molded parts. A four-factor (melt temperature, mold temperature, injection speed and packing pressure) and three-level fractional experimental design was performed to investigate the influence of each factor on the mechanical properties and determine the optimal process conditions that maximize the mechanical properties of the part using the signal-to-noise (S/N) ratio response. The mechanical properties (e.g., elastic modulus, yield strength and strain at break) were m

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Jiang, Guoping, Xiaojun Liu, and Jin Shi. "Factors Affecting the Pillow Effect in Single-Point Incremental Forming." In 15th International Conference on Applied Human Factors and Ergonomics (AHFE 2024). AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1005155.

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Single-point incremental forming (SPIF) is a machining process that uses a tool to perform extrusion motion on a metal sheet blank, causing plastic deformation of the metal sheet blank to achieve the target model size accuracy requirement. The pillow effect, which occurs in the unformed region at the bottom of the part, significantly impacts the accuracy of the final product. Optimizing process parameters is necessary to minimize the impact of the pillow effect on accuracy. Conducting experiments to optimize the process parameters will inevitably increase research and development costs and ext

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An, Liansuo, Peng Wang, Guoqing Shen, and Jie Shi. "Time Delay Estimator for Boiler Tube Leakage Localization." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55442.

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The inference of strong background noise and reflected by the wall and tube rows surface makes it impossible that justify accurately leakage position employing the characteristic received by multi-channel sensors. It is the ‘bottleneck’ for promoting the accuracy of boiler tube leakage location. The 600MW supercritical boiler model was established, the leakage source propagation process of reflection and attenuation in boiler furnace was simulated by EASE. The approximate signal to noise ratio (SNR) was obtained and the reverberation time was calculated with the squared impulse response integr

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