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Journal articles on the topic 'Additive impulse noise'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Bekkiev, A. Yu, and V. A. Makoviy. "Impulse Noise Parameter Assessment in a Batch Radio Channel." Russian Technological Journal 7, no. 3 (2019): 28–40. http://dx.doi.org/10.32362/2500-316x-2019-7-3-28-40.

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Modern radio communication means to provide safe data transmission due to adapting radio channel to the actual noise environment. It is impossible to conduct proper comparative tests on various radio stations offered by manufacturers and to compare objectively the results obtained in field without actual signal parameters and noise environment instrument inspection at the reception point. The paper considers tactical level radio communications system operation when jammed with powerful impulse noise of various nature. It suggests a device enabling to assess the main parameters of impulse noise

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ITOH, MAKOTO, TAO YANG, and LEON O. CHUA. "EXPERIMENTAL STUDY OF IMPULSIVE SYNCHRONIZATION OF CHAOTIC AND HYPERCHAOTIC CIRCUITS." International Journal of Bifurcation and Chaos 09, no. 07 (1999): 1393–424. http://dx.doi.org/10.1142/s0218127499000961.

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In this paper, experimental results on impulsive synchronization of two kinds of chaotic circuits; namely, Chua's oscillator and a hyperchaotic circuit, are presented. To impulsively synchronize two Chua's oscillators, synchronization impulses sampled from one state variable of the driving circuit are transmitted to the driven circuit. To impulsively synchronize two hyperchaotic circuits, synchronizing impulses sampled from two signals of the driving circuit are sent to the driven circuit. Our experimental results show that the accuracy of impulsive synchronization depends on both the period a

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Zhou, Yuqian, Jianbo Jiao, Haibin Huang, Jue Wang, and Thomas Huang. "Adaptation Strategies for Applying AWGN-Based Denoiser to Realistic Noise." Proceedings of the AAAI Conference on Artificial Intelligence 33 (July 17, 2019): 10085–86. http://dx.doi.org/10.1609/aaai.v33i01.330110085.

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Discriminative learning based denoising model trained with Additive White Gaussian Noise (AWGN) performs well on synthesized noise. However, realistic noise can be spatialvariant, signal-dependent and a mixture of complicated noises. In this paper, we explore multiple strategies for applying an AWGN-based denoiser to realistic noise. Specifically, we trained a deep network integrating noise estimating and denoiser with mixed Gaussian (AWGN) and Random Value Impulse Noise (RVIN). To adapt the model to realistic noises, we investigated multi-channel, multi-scale and super-resolution approaches.

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Yuan, Quan, Zhenyun Peng, Zhencheng Chen, Yanke Guo, Bin Yang, and Xiangyan Zeng. "Medical Image Denoising Algorithm Based on Sparse Nonlocal Regularized Weighted Coding and Low Rank Constraint." Scientific Programming 2021 (June 7, 2021): 1–6. http://dx.doi.org/10.1155/2021/7008406.

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Medical image information may be polluted by noise in the process of generation and transmission, which will seriously hinder the follow-up image processing and medical diagnosis. In medical images, there is a typical mixed noise composed of additive white Gaussian noise (AWGN) and impulse noise. In the conventional denoising methods, impulse noise is first removed, followed by the elimination of white Gaussian noise (WGN). However, it is difficult to separate the two kinds of noises completely in practical application. The existing denoising algorithm of weight coding based on sparse nonlocal

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Brekhna, Brekhna, Arif Mahmood, and Yuanfeng Zhou. "Robustness analysis of superpixel algorithms to image blur, additive Gaussian noise, and impulse noise." Journal of Electronic Imaging 26, no. 06 (2017): 1. http://dx.doi.org/10.1117/1.jei.26.6.061604.

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Drobakhin, O. O., and O. V. Olevskyi. "Approaches for improvement of reliability of the Prony’s method computation." Journal of Physics: Conference Series 2675, no. 1 (2023): 012028. http://dx.doi.org/10.1088/1742-6596/2675/1/012028.

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Abstract Parametric spectral analysis methods such as the Prony’s method can estimate the frequencies and amplitudes of a signal, conforming to their model, with great precision. At the same time, the addition of noise to the signal can lead to a complete model breakdown which leads to erroneous parameter values. This is especially true for the impulse noise. The article explores several possible algorithms which can be applied to the Prony’s method in order to refine the results and make them more noise resistant. Such algorithms include signal segmentation methods where the results of each s

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Zhou, Yuqian, Jianbo Jiao, Haibin Huang, et al. "When AWGN-Based Denoiser Meets Real Noises." Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 07 (2020): 13074–81. http://dx.doi.org/10.1609/aaai.v34i07.7009.

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Discriminative learning based image denoisers have achieved promising performance on synthetic noises such as Additive White Gaussian Noise (AWGN). The synthetic noises adopted in most previous work are pixel-independent, but real noises are mostly spatially/channel-correlated and spatially/channel-variant. This domain gap yields unsatisfied performance on images with real noises if the model is only trained with AWGN. In this paper, we propose a novel approach to boost the performance of a real image denoiser which is trained only with synthetic pixel-independent noise data dominated by AWGN.

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Singh, Satya P., and Shabana Urooj. "Localized Radon Polar Harmonic Transform (LRPHT) Based Rotation Invariant Analysis of Textured Images." International Journal of System Dynamics Applications 4, no. 2 (2015): 21–41. http://dx.doi.org/10.4018/ijsda.2015040102.

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In this paper, the authors propose a method to analyze and capture the information from texture regardless their geometric deformation. Input image is transformed to radon space and multiresolution is achieved within the radon space using Gaussian derivative wavelet. The transformed image is applied to the polar harmonic transform (PHT). The proposed method is tested against additive Gaussian noise and impulse noise with different rotations. A k- nearest neighbor classifier is employed to classify the texture. To test and evaluate correct classification percentage of the method, several sets o

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SU, LIYUN, and RUIHUA LIU. "BLIND IMAGE RESTORATION WITH MODIFIED CMA." International Journal of Image and Graphics 11, no. 03 (2011): 403–13. http://dx.doi.org/10.1142/s0219467811004147.

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In this paper, a new blind restoration scheme for blurred noisy image is proposed. The blurred noisy image is assumed to be the output of a linear space-invariant (LSI) system with an unknown point spread function (PSF) contaminated by an additive noise. The scheme passes the blurred noisy image through a two-dimensional (2D) finite impulse response filter whose parameters are updated by the modified constant modulus algorithm (CMA) with averaging and variable step size adaptive filter. When convergence occurs, the output of the filter is an estimate of the unobserved true image. Simulation an

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Aarti and Gaurav Pushkarna. "Comparative Study of Image Denoising Algorithms in Digital Image Processing." COMPUSOFT: An International Journal of Advanced Computer Technology 03, no. 04 (2014): 788–92. https://doi.org/10.5281/zenodo.14742479.

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This paper proposes a basic scheme for understanding the fundamentals of digital image processing and the image denising algorithm. There are three basic operation categorized on during image processing i.e. image rectification and restoration, enhancement and information extraction. Image denoising is the basic problem in digital image processing. The main task is to make the image free from Noise. Salt & pepper (Impulse) noise and the additive white Gaussian noise and blurredness are the types of noise that occur during transmission and capturing. For denoising the image there are some a

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Cuc, Adriana-Maria, Florin Lucian Morgoș, Adriana-Marcela Grava, and Cristian Grava. "Estimation of the Impulse Response of the AWGN Channel with ISI within an Iterative Equalization and Decoding System That Uses LDPC Codes." Entropy 26, no. 9 (2024): 720. http://dx.doi.org/10.3390/e26090720.

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In this paper, new schemes have been proposed for the estimation of the additive white Gaussian noise (AWGN) channel with intersymbol interference (ISI) in an iterative equalization and decoding system using low-density parity check (LDPC) codes. This article explores the use of the least squares algorithm in various scenarios. For example, the impulse response of the AWGN channel h was initially estimated using a training sequence. Subsequently, the impulse response was calculated based on the training sequence and then re-estimated once using the sequence estimated from the output of the LDP

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Yin, Xiao-Xia, and Sillas Hadjiloucas. "Digital Filtering Techniques Using Fuzzy-Rules Based Logic Control." Journal of Imaging 9, no. 10 (2023): 208. http://dx.doi.org/10.3390/jimaging9100208.

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This paper discusses current formulations based on fuzzy-logic control concepts as applied to the removal of impulsive noise from digital images. We also discuss the various principles related to fuzzy-ruled based logic control techniques, aiming at preserving edges and digital image details efficiently. Detailed descriptions of a number of formulations for recently developed fuzzy-rule logic controlled filters are provided, highlighting the merit of each filter. Fuzzy-rule based filtering algorithms may be designed assuming the tailoring of specific functional sub-modules: (a) logical control

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Persanov, I. D., O. M. Dumin, V. A. Plakhtii, O. A. Pryshchenko, and F. G. Fomin. "Comparison of corellation method and artifitial neural networks for determining of object position by ultrawideband fields." 34, no. 34 (June 30, 2021): 39–47. http://dx.doi.org/10.26565/2311-0872-2021-34-05.

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Background: Global and local positioning systems have a wide area of civil and military applications. Transport, logistics, precise agriculture, industrial technologies, safety systems need a strict definition of objects position on plane or in space. Existing modern positioning systems have some drawbacks in utilization and restrictions in application. Objectives: To improve a system of local positioning on a plane that does not need a time synchronization using the impulse ultrawideband electromagnetic field of two spaced bow-tie antennas and analysis and recognition of time forms of receive

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Sharlandjiev, Peter, Dimana Nazarova, and Nataliya Berberova. "Digital Image Denoising by Adaptive Median Filtering and Wavelet Transform." Digital Presentation and Preservation of Cultural and Scientific Heritage 4 (September 30, 2014): 213–17. http://dx.doi.org/10.55630/dipp.2014.4.25.

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Digital image processing is an important area of preservation and representation of cultural and historical objects. Part of it is the task of cleaning images corrupted by noise. Many different methods and approaches have been successfully implemented, but still filtering and denoising techniques are developing and improving intensively. Herein, we report numeric simulations of 2D image filtering. Effects of impulse noise are very efficiently reduced by adaptive median filtering. The situation of additive noise, which itself depends on the intensity of the original image, is more complicated.

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Ekbal, Hussain Ali, Hameed Reja Ahmed, and H. Abood Layla. "Design hybrid filter technique for mixed noise reduction from synthetic aperture radar imagery." Bulletin of Electrical Engineering and Informatics 11, no. 3 (2022): 1325~1331. https://doi.org/10.11591/eei.v11i3.3708.

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For military and civilian applications, synthetic aperture radar (SAR) imaging is an essential instrument for obtaining images of the Earth's surface. Speckle noise, a form of noise that is multiplicative, generated by conflicting echoes returned from each pixel, has a significant impact on the SAR picture. On SAR pictures, a hybrid filter for mixed noise reduction is used to remove the mixed noises that are present in the data during capture and transmission. Specifically, speckle noise and salt and pepper noises from SAR images. Both are being worked on at the same time to minimize mixed

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Cuc, Adriana-Maria, Florin Lucian Morgoș, Adriana-Marcela Grava, and Cristian Grava. "Iterative Equalization and Decoding over an Additive White Gaussian Noise Channel with ISI Using Low-Density Parity-Check Codes." Applied Sciences 13, no. 22 (2023): 12294. http://dx.doi.org/10.3390/app132212294.

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In this article we present an iterative system of equalization and decoding to manage the intersymbol interference over an additive white Gaussian noise (AWGN) channel. Following the classic turbo equalization scheme, the proposed system consists of low-density parity-check (LDPC) coding at the transmitter side; we applied a Log maximum a posteriori probability (Log-MAP) equalizer and min-sum LDPC decoding at the receiver side. The equalizer and decoder, linked through interleaving and deinterleaving, iteratively update each other’s information. We performed the performance analysis of the pro

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SINGH, GOPAL, and H. N. MISHRA. "Noise Minimization in Wireless Network." Material Science Research India 9, no. 2 (2012): 239–42. http://dx.doi.org/10.13005/msri/090210.

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The 2Dwhitenoise model has been extended to represent a modified power law that is realistic. It allows for finite moments for the interference.The white noise processes with a decaying power law.Impulse response functions are ideally suited for modeling the network self-interference in an ad hoc network.The nodes are distributed in a plane according to a Poisson point process. A stochastic impulse response function is used to model different random parameters like channel fluctuation, variable transmission power of the nodes etc. For a decaying power law, all the moments of the interference d

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Wang, Yifei, Huili Fan, Xuebo Zhang, et al. "A Viterbi Decoder under Class A Modeled Noise in Shallow Water." Wireless Communications and Mobile Computing 2022 (June 23, 2022): 1–10. http://dx.doi.org/10.1155/2022/1956938.

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A traditional Viterbi decoder is primarily optimized for additive white Gaussian noise (AWGN). With the AWGN channel, it offers good decoding performance. However, the underwater acoustic communication (UAC) channel is extremely complicated. In addition to white noise, there are a variety of artificial and natural impulse noise that occur suddenly. The traditional Viterbi decoder cannot obtain the optimum performance under this case. In order to solve this problem, this paper introduces a novel Viterbi decoder with the impulsive noise, which is considered to be subjected to Middleton Class A d

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Senthilkumar, Dr P., 2Asha.V, Dr G. Ramesh, M.Muthukumar, and Dr Amairullah Khan Lodhi. "ANAUDIO DENOISING APPROACH USING HYBRID MODIFIED FAST WAVELET TRANSFORM METHOD." International Journal Of Trendy Research In Engineering And Technology 06, no. 06 (2022): 17–22. http://dx.doi.org/10.54473/ijtret.2022.6604.

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Noise includes all unwelcome ambient sounds. If a sound is perceived as delightful music or annoying noise, it will be perceived as having the same decibel level. The fundamental drawback of noise in an audio signal is that it degrades the signal's quality during transmission over the communication system. Real-time audio signals are gathered for the present study using a microphone. The additive white Gaussian noise of AWGN is blended with a genuine audio source. The Median, Finite Impulse Response filter with Wavelet Transform approach is a hybrid filter for denoising audio signals that inco

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Muto, Vincenzo, Emilio Andreozzi, Carmela Cappelli, et al. "Real-Time Implementation of a Frequency Shifter for Enhancement of Heart Sounds Perception on VLIW DSP Platform." Electronics 12, no. 20 (2023): 4359. http://dx.doi.org/10.3390/electronics12204359.

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Auscultation of heart sounds is important to perform cardiovascular assessment. External noises may limit heart sound perception. In addition, heart sound bandwidth is concentrated at very low frequencies, where the human ear has poor sensitivity. Therefore, the acoustic perception of the operator can be significantly improved by shifting the heart sound spectrum toward higher frequencies. This study proposes a real-time frequency shifter based on the Hilbert transform. Key system components are the Hilbert transformer implemented as a Finite Impulse Response (FIR) filter, and a Direct Digital

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Li, Chang, Yu Liu, Juan Cheng, et al. "Hyperspectral Unmixing with Bandwise Generalized Bilinear Model." Remote Sensing 10, no. 10 (2018): 1600. http://dx.doi.org/10.3390/rs10101600.

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Generalized bilinear model (GBM) has received extensive attention in the field of hyperspectral nonlinear unmixing. Traditional GBM unmixing methods are usually assumed to be degraded only by additive white Gaussian noise (AWGN), and the intensity of AWGN in each band of hyperspectral image (HSI) is assumed to be the same. However, the real HSIs are usually degraded by mixture of various kinds of noise, which include Gaussian noise, impulse noise, dead pixels or lines, stripes, and so on. Besides, the intensity of AWGN is usually different for each band of HSI. To address the above mentioned i

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Tian, Tian, Kunde Yang, Fei-Yun Wu, and Ying Zhang. "Channel Estimation for Underwater Acoustic Communications in Impulsive Noise Environments: A Sparse, Robust, and Efficient Alternating Direction Method of Multipliers-Based Approach." Remote Sensing 16, no. 8 (2024): 1380. http://dx.doi.org/10.3390/rs16081380.

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Channel estimation in Underwater Acoustic Communication (UAC) faces significant challenges due to the non-Gaussian, impulsive noise in ocean environments and the inherent high dimensionality of the estimation task. This paper introduces a robust channel estimation algorithm by solving an l1−l1 optimization problem via the Alternating Direction Method of Multipliers (ADMM), effectively exploiting channel sparsity and addressing impulsive noise outliers. A non-monotone backtracking line search strategy is also developed to improve the convergence behavior. The proposed algorithm is low in comple

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Amir, Nadav, Naftali Tishby, and Israel Nelken. "A simple model of the attentional blink and its modulation by mental training." PLOS Computational Biology 18, no. 8 (2022): e1010398. http://dx.doi.org/10.1371/journal.pcbi.1010398.

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The attentional blink (AB) effect is the reduced probability of reporting a second target (T2) that appears shortly after a first one (T1) within a rapidly presented sequence of distractors. The AB effect has been shown to be reduced following intensive mental training in the form of mindfulness meditation, with a corresponding reduction in T1-evoked P3b brain potentials. However, the mechanisms underlying these effects remain unknown. We propose a dynamical-systems model of the AB, in which attentional load is described as the response of a dynamical system to incoming impulse signals. Non-ta

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Abdullah, Sarcote N. "IMPROVED DATA DETECTION PROCESSES USING RETRAINING OVER TELEPHONE LINES." Journal of Engineering 15, no. 1 (2009): 3336–46. http://dx.doi.org/10.31026/j.eng.2009.01.08.

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This paper describes two new developed detection processes for a modem over the publicswitched telephone network. The modem is a synchronous serial system using a 16-pointQAM signal with a detector. The detector is preceded by an adaptive filter that is adjustedto make the sampled impulse response of the channel and filter minimum phase. The ideaof these two new detectors is to transmit a known retraining data every specified intervaland make use of these known data to improve the conventional nonlinear equalizer andnear maximum likelihood detector.Results of computer simulation tests are pres

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Aarif, L’houssaine, Mohamed Tabaa, and Hanaa Hachimi. "Performance Evaluation of LoRa Communications in Harsh Industrial Environments." Journal of Sensor and Actuator Networks 12, no. 6 (2023): 80. http://dx.doi.org/10.3390/jsan12060080.

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LoRa technology is being integrated into industrial applications as part of Industry 4.0 owing to its longer range and low power consumption. However, noise, interference, and the fading effect all have a negative impact on LoRa performance in an industrial environment, necessitating solutions to ensure reliable communication. This paper evaluates and compares LoRa’s performance in terms of packet error rate (PER) with and without forward error correction (FEC) in an industrial environment. The impact of integrating an infinite impulse response (IIR) or finite impulse response (FIR) filter int

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Dilungana, Stéphane, Antoine Deleforge, Cédric Foy, and Sylvain Faisan. "Learning-based estimation of individual absorption profiles from a single room impulse response with known positions of source, sensor and surfaces." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 1 (2021): 5623–30. http://dx.doi.org/10.3397/in-2021-3186.

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In situ estimation of the individual absorption profiles of a room remains a challenging problem in building acoustics. This work is aimed at studying the feasibility of this estimation in a shoebox room of fixed and known geometry, using a room impulse response measured from a source and sensor at fixed and known positions. This problem is tackled using supervised learning. Three neural network architectures are compared. Simulated training and validation sets featuring various types of perturbations (surface diffusion, geometrical errors and additive white Gaussian noise) are generated. An e

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Yang, Tao, and Leon O. Chua. "Impulsive Control and Synchronization of Nonlinear Dynamical Systems and Application to Secure Communication." International Journal of Bifurcation and Chaos 07, no. 03 (1997): 645–64. http://dx.doi.org/10.1142/s0218127497000443.

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Impulsive control is a newly developed control theory which is based on the theory of impulsive differential equations. In this paper, we stabilize nonlinear dynamical systems using impulsive control. Based on the theory of impulsive differential equations, we present several theorems on the stability of impulsive control systems. An estimation of the upper bound of the impulse interval is given for the purpose of asymptotically controlling the nonlinear dynamical system to the origin by using impulsive control laws. In this paper, impulsive synchronization of two nonlinear dynamical systems i

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Padma, A., Dr R. Sukanesh, and A. Santhana Vijayan. "A New Genetic Based Multilayered Fuzzy Image Filter for Removing Additive Identical Independent Distribution Impulse Noise from Medical Images." International Journal of Computer Applications 1, no. 8 (2010): 102–13. http://dx.doi.org/10.5120/172-299.

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Takpaya, Kazi, and Gang Wei. "Maximum likelihood source separation for finite impulse response multiple input-multiple output channels in the presence of additive noise." Journal of Electronics (China) 20, no. 2 (2003): 81–85. http://dx.doi.org/10.1007/s11767-003-0001-2.

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Panchenko, Sergii, Olha Ananieva, Mykhailo Babaiev, Mykhailo Davidenko, and Vladyslav Panchenko. "Synthesis of a device for anti-jamming reception of signals of tonal rail circuits on the background of additive five-component interference." Eastern-European Journal of Enterprise Technologies 3, no. 9(111) (2021): 94–102. http://dx.doi.org/10.15587/1729-4061.2021.235835.

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An optimal receiving device for information signals of tonal rail circuits has been synthesized. The signals are observed against the background of an additive five-component interference. The first component of the interference is broadband Gaussian noise. The other four components of the interference are structurally determined: single impulse interference, interference from an adjacent tonal rail circuit, and multiharmonic interference from alternating traction current combined with the power line and from the locomotive traction converter. The presence of a complex of interference leads to

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Sergii, Panchenko, Ananieva Olha, Babaiev Mykhailo, Davidenko Mykhailo, and Panchenko Vladyslav. "Synthesis of a device for anti-jamming reception of signals of tonal rail circuits on the background of additive five-component interference." Eastern-European Journal of Enterprise Technologies 3, no. 9 (111) (2021): 94–102. https://doi.org/10.15587/1729-4061.2021.235835.

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An optimal receiving device for information signals of tonal rail circuits has been synthesized. The signals are observed against the background of an additive five-component interference. The first component of the interference is broadband Gaussian noise. The other four components of the interference are structurally determined: single impulse interference, interference from an adjacent tonal rail circuit, and multiharmonic interference from alternating traction current combined with the power line and from the locomotive traction converter. The presence of a complex of interference leads to

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Qiu, Zhimin, Hongsen He, Jingdong Chen, Jacob Benesty, and Yi Yu. "Robust regularized blind system identification with application to adaptive speech dereverberation." Journal of the Acoustical Society of America 158, no. 1 (2025): 615–27. https://doi.org/10.1121/10.0037195.

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The normalized multichannel frequency-domain least-mean square (NMCFLMS) algorithm is a prominent method for blind identification of multichannel acoustic systems. However, the NMCFLMS algorithm relies on a constant, determined by a block of microphone signals, to define the regularization parameter. This setup makes the algorithm sensitive to variations in speech segments and noise conditions. In this paper, we propose a variable regularization parameter that incorporates key factors, such as signal-to-noise ratio, output signal power, and filter length, to enhance the robustness of the algor

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Simerjeet Kaur, Dr Kamal Kumar Sharma, and Mr. Navnidhi Sharma. "Analysis of BER Improvement of Adaptive Equalizer using CE and STB code." International Journal of Research in Informative Science Application & Techniques (IJRISAT) 3, no. 6 (2019): 44–50. http://dx.doi.org/10.46828/ijrisat.v3i6.132.

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In a wireless communication channel, when the modulation bandwidth is exceeding the coherence bandwidth ISI takes place as the transmitted pulses are spread into the adjacent symbols. To combat the effects of ISI and noise and to reconstruct the signal and minimize Bit Error Rate (BER), the adaptive channel equalizer is used at the receiver end. Various kinds of interferences in a communication channel exists like Inter symbol Interference, Multipath Interference and Additive Interference which deals with the design of an Adaptive Equalizer. The idea of the equalizer is to build filter in the

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OLIINYK, VIACHESLAV, and VOLODYMYR LUKIN. "USE OF SIMILARITY METRICS IN ROBUST TIME DELAY ESTIMATION." Herald of Khmelnytskyi National University. Technical sciences 319, no. 2 (2023): 224–30. http://dx.doi.org/10.31891/2307-5732-2023-319-1-224-230.

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This paper addresses the task of time delay and direction of arrival estimation for a source of the wideband signal using two sensors with fixed displacement. The peculiarity of the task statement is that a limited time of signal observation is supposed and additive noise is assumed non-Gaussian with a heavy-tail distribution. This leads to a high probability of abnormal estimates for the conventional signal processing method based on cross-correlation. To decrease this probability, it is proposed to reformulate the task of cross-correlation processing to the task of similarity estimation betw

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Savchenko, V. V., and L. V. Savchenko. "Linear prediction coefficients correction method for digital speech processing systems with data compression based on the autoregressive model of a voice signal." Radiotehnika i èlektronika 69, no. 4 (2024): 339–47. http://dx.doi.org/10.31857/s0033849424040056.

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The problem of distortion of the autoregressive model of the voice signal under the influence of additive background noise in digital speech processing systems with data compression based on linear prediction is considered. In the frequency domain, these distortions are observed in the weakening of the main formants responsible for the intelligibility of the speaker’s speech. To compensate for formant attenuation, it is proposed to modify the parameters of the autoregressive model (linear prediction coefficients) using the impulse response of a recursive shaping filter. Along with the amplitud

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Науменко, Виктория Владимировна, Галина Анатольевна Проскура, Александр Владимирович Тоцкий та Валерий Борисович Шаронов. "ИСПОЛЬЗОВАНИЕ РАЗВЕТВЛЕННОГО БИСПЕКТРАЛЬНО-ОРГАНИЗОВАННОГО КОДА В НЕСТАЦИОНАРНЫХ КАНАЛАХ СВЯЗИ С ЗАМИРАНИЯМИ". RADIOELECTRONIC AND COMPUTER SYSTEMS, № 1 (23 березня 2019): 44–57. http://dx.doi.org/10.32620/reks.2019.1.05.

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One of the main problems in modern wireless telecommunication systems and networks is the transmission and reception of signals in a multipath environment. Due to the nonideal impulse response of the communication channel, the frequency selective fading of the transmitted signal occurs. Diffraction and interference effects create a complex non-stationary structure of the electromagnetic field, which varies greatly in space and time. The method of branched BIS is organized - redundant coding, which allows you to receive and recognize a signal in a digital communication system in the presence of

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Tlach, Vladimír, Michael Yurievich Alies, Ivan Kuric, et al. "Use of Spatio-Structural Parameters of the Multiscan Video Signal for Improving Accuracy of Control over Object Geometric Parameters." Applied Sciences 13, no. 5 (2023): 2994. http://dx.doi.org/10.3390/app13052994.

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In the present paper, we consider the issue of improving the accuracy of measurements and the peculiar features of the measurements of the geometric parameters of objects by optoelectronic systems, based on a television multiscan in the analogue mode in scanistor enabling. It is shown that the convolution of the input signal of the rectangular profile of the light zone with the impulse response of the multiscan explains the smearing of video signal edges. The value of smearing is completely determined by impulse response and does not depend on the zone width. It is established that signals of

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Burrascano, Pietro, and Matteo Ciuffetti. "Early Detection of Defects through the Identification of Distortion Characteristics in Ultrasonic Responses." Mathematics 9, no. 8 (2021): 850. http://dx.doi.org/10.3390/math9080850.

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Ultrasonic techniques are widely used for the detection of defects in solid structures. They are mainly based on estimating the impulse response of the system and most often refer to linear models. High-stress conditions of the structures may reveal non-linear aspects of their behavior caused by even small defects due to ageing or previous severe loading: consequently, models suitable to identify the existence of a non-linear input-output characteristic of the system allow to improve the sensitivity of the detection procedure, making it possible to observe the onset of fatigue-induced cracks a

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Cheng, Li, Chang Jinfeng, Liu Zhao, and Fan Shangchun. "Multiple-Echo Suppression Modeling and Experimental Verification for Acoustic Transmission along Periodic Drillstring Using Dual Receivers." Shock and Vibration 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/295279.

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In the oil industry, the accompanied reverberation is a major constraint in the transmission rate and distance because the drillstring is a heterogeneous assembly. Based on the transient impulse responses in uplink and downlink channels, an improved simplified echo suppression model with two acoustic receivers is presented in consideration of position optimization of single acoustic receiver. Then the acoustic receiving characteristics of transmitted signals in a length-limited periodic drillstring channel are obtained in single- and dual-receiver modes. An additive downward white Gaussian noi

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Turek, Javier S., Michael Elad, and Irad Yavneh. "Clutter Mitigation in Echocardiography Using Sparse Signal Separation." International Journal of Biomedical Imaging 2015 (2015): 1–18. http://dx.doi.org/10.1155/2015/958963.

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In ultrasound imaging, clutter artifacts degrade images and may cause inaccurate diagnosis. In this paper, we apply a method called Morphological Component Analysis (MCA) for sparse signal separation with the objective of reducing such clutter artifacts. The MCA approach assumes that the two signals in the additive mix have each a sparse representation under some dictionary of atoms (a matrix), and separation is achieved by finding these sparse representations. In our work, an adaptive approach is used for learning the dictionary from the echo data. MCA is compared to Singular Value Filtering

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Ramley, Intesar F. El, Saleha M. AlZhrani, Nada M. Bedaiwi, Yas Al-Hadeethi, and Abeer Z. Barasheed. "Simple Moment Generating Function Optimisation Technique to Design Optimum Electronic Filter for Underwater Wireless Optical Communication Receiver." Mathematics 12, no. 6 (2024): 861. http://dx.doi.org/10.3390/math12060861.

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This paper introduces a new simple moment-generating function (MGF) design modelling method to conclude an optimum filter to maximize the Q-factor and increase the link communication span. This approach mitigates the pulse temporal dispersion, particularly the underwater wireless optical communication (UWOC) systems. Hence, some form of equalizing filter design is highly desirable. The model solution environment includes a Double Gamma Function (DGF) water channel impulse response, intersymbol interference (ISI), stochastic Poisson process, and additive Gaussian thermal noise (AGTN). The optim

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Dostovalova, A. M., and A. K. Gorshenin. "Neural Network Image Classifiers Informed by Factor Analyzers." Doklady Mathematics 110, S1 (2024): S35—S41. https://doi.org/10.1134/s106456242460204x.

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Abstract The paper develops an approach to probability informing deep neural networks, that is, improving their results by using various probability models within architectural elements. We introduce factor analyzers with additive and impulse noise components as such models. The identifiability of the model is proved. The relationship between the parameter estimates by the methods of least squares and maximum likelihood is established, which actually means that the estimates of the parameters of the factor analyzer obtained within the informed block are unbiased and consistent. A mathematical

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Shahab, Maha Monther, Saad Mshhain Hardan, and Asmaa Salih Hammoodi. "A new Transmission and Reception Algorithms for Improving the Performance of SISO/MIMO- OFDM Wireless Communication System." TJES: Vol. 28, No.3 28, no. 3 (2021): 146–58. http://dx.doi.org/10.25130/tjes.28.3.11.

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The future wireless communication requires a reliable transmission at high data rates, so the transmission over frequency-selective fading Multiple-Input–Multiple-Output MIMO channels become interesting since the capacity of "MIMO" channels expressions enormous gains above that of their essential single-input–single-output "SISO" channels. This paper examines the performance of the Low Complexity Zero Forcing "LCZF" equalizer for both systems single-input–single-output-Orthogonal Frequency Division Multiplexing" SISO-OFDM" and spatially multiplexed-Multiple-Input–Multiple-Output "SM-MIMO-OFDM"

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Maksimov, A. I., and V. V. Sergeyev. "A method for optimal linear super-resolution image restoration." Computer Optics 5, no. 45 (2021): 692–701. http://dx.doi.org/10.18287/2412-6179-co-909.

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In this paper, we propose a super-resolution (pixel grid refinement) method for digital images. It is based on the linear filtering of a zero-padded discrete signal. We introduce a continuous-discrete observation model to create a reconstruction system. The proposed observation model is typical of real-world imaging systems - an initially continuous signal first undergoes linear (dynamic) distortions and then is subjected to sampling and the effect of additive noise. The proposed method is optimal in the sense of mean square recovery error minimization. In the theoretical part of the article,

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Maksimov, A. I., and V. V. Sergeyev. "A method for optimal linear super-resolution image restoration." Computer Optics 5, no. 45 (2021): 692–701. http://dx.doi.org/10.18287/2412-6179-co-909.

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In this paper, we propose a super-resolution (pixel grid refinement) method for digital images. It is based on the linear filtering of a zero-padded discrete signal. We introduce a continuous-discrete observation model to create a reconstruction system. The proposed observation model is typical of real-world imaging systems - an initially continuous signal first undergoes linear (dynamic) distortions and then is subjected to sampling and the effect of additive noise. The proposed method is optimal in the sense of mean square recovery error minimization. In the theoretical part of the article,

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Tulyakova, Nataliya, and Oleksandr Trofymchuk. "Application of myriad filtering in real-time trend detection algorithms." International Scientific Technical Journal "Problems of Control and Informatics" 69, no. 6 (2024): 91–106. https://doi.org/10.34229/1028-0979-2024-6-8.

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Detecting nonlinear (with sharp changes) signal trends in pseudo-real-time is necessary in many digital signal-processing applications. In biomedical signal processing, it is essential to eliminate abrupt signal distortions caused by the patientʼs movements. Linear filtering can smooth the edges and other discontinuity transitions in a signal, which is a drawback. Nonlinear robust filters, as median-type algorithms, successfully process such signals. In particular, median hybrid filters with finite impulse response (FIR) are efficient for processing edges. The paper discusses the «in-place gro

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Овчинников, В. В. "ЦИФРОВОЙ SDR-ЭКВАЛАЙЗЕР ДЛЯ РАБОТЫ БЫСТРОЙ ПРОГРАММНОЙ ПЕРЕСТРОЙКИ РАБОЧЕЙ ЧАСТОТЫ В ДИСПЕРГИРУЮЩИХ ИОНОСФЕРНЫХ КАНАЛАХ ШИРОКОПОЛОСНОЙ КВ-СВЯЗИ". Vestnik of Volga State University of Technology. Series Radio Engineering and Infocommunication Systems, № 3(47) (18 листопада 2020): 18–27. https://doi.org/10.25686/2306-2819.2020.3.18.

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Решалась задача создания цифрового адаптивного эквалайзера в полосе частот широкополосной КВ-связи для преодоления негативного эффекта нелинейной фазовой дисперсии среды. Методики, алгоритмы и программное обеспечение (ПО) разработаны применительно к технологии SDR и реализованы с использованием универсальной платформы USRP N210. Применялись современные подходы к цифровой обработке сигналов. Верификация созданных алгоритмов и программного обеспечения осуществлялась в натурных экспериментах на радиотрассе о. Кипр – г. Йошкар-Ола, протяжённостью 2 600 км. В качестве физической модели программной

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Bautista, John Lorenzo, Yun Kyung Lee, and Hyun Soon Shin. "Speech Emotion Recognition Based on Parallel CNN-Attention Networks with Multi-Fold Data Augmentation." Electronics 11, no. 23 (2022): 3935. http://dx.doi.org/10.3390/electronics11233935.

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In this paper, an automatic speech emotion recognition (SER) task of classifying eight different emotions was experimented using parallel based networks trained using the Ryeson Audio-Visual Dataset of Speech and Song (RAVDESS) dataset. A combination of a CNN-based network and attention-based networks, running in parallel, was used to model both spatial features and temporal feature representations. Multiple Augmentation techniques using Additive White Gaussian Noise (AWGN), SpecAugment, Room Impulse Response (RIR), and Tanh Distortion techniques were used to augment the training data to furth

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Gratias, Paul, Jamal Nasr, Corentin Affortit, et al. "Impulse Noise Induced Hidden Hearing Loss, Hair Cell Ciliary Changes and Oxidative Stress in Mice." Antioxidants 10, no. 12 (2021): 1880. http://dx.doi.org/10.3390/antiox10121880.

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Recent studies demonstrated that reversible continuous noise exposure may induce a temporary threshold shift (TTS) with a permanent degeneration of auditory nerve fibers, although hair cells remain intact. To probe the impact of TTS-inducing impulse noise exposure on hearing, CBA/J Mice were exposed to noise impulses with peak pressures of 145 dB SPL. We found that 30 min after exposure, the noise caused a mean elevation of ABR thresholds of ~30 dB and a reduction in DPOAE amplitude. Four weeks later, ABR thresholds and DPOAE amplitude were back to normal in the higher frequency region (8–32 k

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Ogiwara, Haruo, and Ryuichi Ootaki. "Trellis coded modulation for additive impulsive noise." Electronics and Communications in Japan (Part III: Fundamental Electronic Science) 73, no. 12 (1990): 71–78. http://dx.doi.org/10.1002/ecjc.4430731208.

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