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Готові списки джерел за темами / Spatial interference filtering / Статті в журналах

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Статті в журналах з теми "Spatial interference filtering"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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1

Dai, Huan Yao, Xue Song Wang, and Yong Zhen Li. "Spatial Virtual Polarization Filter Design for Radar Sensor." Advanced Materials Research 239-242 (May 2011): 768–72. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.768.

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As interferences are introduced from main-lobe direction which results in tar-get signal are masked by interference, traditional adaptive beam-forming can not suppress main-lobe interferences effectively. Polarization filtering is a main method to suppress the interference in radar and other sensor systems. Based on the spatial polarization characteristic (SPC) of antenna, a spatial virtual polarization filter (SVPF) is proposed by constructing polarization decomposition and polarization estimation of the received signal. A generalized construction method of SVPF is provided, the performance o

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2

Walborn, S. P., P. H. Souto Ribeiro, and C. H. Monken. "Interference effects induced by non-local spatial filtering." Optics Express 19, no. 18 (2011): 17308. http://dx.doi.org/10.1364/oe.19.017308.

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3

Raza, J., A. J. Boonstra, and A. J. van der Veen. "Spatial filtering of RF interference in radio astronomy." IEEE Signal Processing Letters 9, no. 2 (2002): 64–67. http://dx.doi.org/10.1109/97.991140.

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4

Wang, Hao, Qing Chang, and Yong Xu. "An Anti-Jamming Null-Steering Control Technique Based on Double Projection in Dynamic Scenes for GNSS Receivers." Sensors 19, no. 7 (2019): 1661. http://dx.doi.org/10.3390/s19071661.

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When a global navigation satellite system (GNSS) receiver suppresses interference in a dynamic scene, the direction of the interference signal arriving at the receiver may change rapidly. The null formed by the spatial filtering based on the array antenna will become wider and shallower, and the anti-jamming performance will deteriorate. A null-steering control technique based on a dual projection algorithm is proposed in this paper, which can effectively increase the depth of the null. In this paper, the dynamic model between the interference and the receiver is established first. Based on th

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5

Kochetkov, Anton, Mikhail Martyanov, Vladislav Ginzburg, and Efim Khazanov. "Self-filtering of beam fluence fluctuations at free space propagation." Laser Physics Letters 20, no. 6 (2023): 065001. http://dx.doi.org/10.1088/1612-202x/accf74.

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Abstract It is shown theoretically and experimentally that free space propagation in vacuum provides self-filtering of beam fluence fluctuations (spatial small-scale noise). The linear interference of the noise and the primary smooth beam during the propagation results in temporal filtering invoked by the noise pulse delay with respect to the primary beam pulse and in spatial filtering caused by the noise spatial walk-off from the aperture of the primary beam.

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6

Sheng, Xueli, Xiaoyi Sun, Yali Shi, Longxiang Guo, and Dian Lu. "Strong direct path interference suppression based on spatial filtering." Journal of the Acoustical Society of America 140, no. 4 (2016): 3449. http://dx.doi.org/10.1121/1.4971139.

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7

Shevchenko, M. E., V. N. Malyshev, A. V. Gorovoy, and A. S. Cherepanov. "Spatial Filtering of Signals under Imprecise Calibration of Antenna Arrays." Journal of the Russian Universities. Radioelectronics 26, no. 6 (2023): 27–40. http://dx.doi.org/10.32603/1993-8985-2023-26-6-27-40.

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Introduction. Spatial filtering of signals is performed for the selection the signals of interest when the signals spectra overlap. The quality of spatial filtering depends on the accuracy of antenna array (AA) calibration, which allows estimation of the amplitude-phase distribution (APD) at all possible directions of arrival, thus ensuring the identity of reception paths. A mismatch between the actual and measured APD values leads to quality degradation in all spatial filtering methods.Aim. To develop a method for improving the quality of signal spatial filtering based on the estimates of the

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8

Zhou, Yi, Haiping Wang, Yijing Chu, and Hongqing Liu. "A Robust Dual-Microphone Generalized Sidelobe Canceller Using a Bone-Conduction Sensor for Speech Enhancement." Sensors 21, no. 5 (2021): 1878. http://dx.doi.org/10.3390/s21051878.

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The use of multiple spatially distributed microphones allows performing spatial filtering along with conventional temporal filtering, which can better reject the interference signals, leading to an overall improvement of the speech quality. In this paper, we propose a novel dual-microphone generalized sidelobe canceller (GSC) algorithm assisted by a bone-conduction (BC) sensor for speech enhancement, which is named BC-assisted GSC (BCA-GSC) algorithm. The BC sensor is relatively insensitive to the ambient noise compared to the conventional air-conduction (AC) microphone. Hence, BC speech can b

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9

Alaei, Masoud Abbasi, Sajad Golabighezelahmad, Pieter-Tjerk de Boer, Frank E. van Vliet, Eric A. M. Klumperink, and Andre B. J. Kokkeler. "Interference Mitigation by Adaptive Analog Spatial Filtering for MIMO Receivers." IEEE Transactions on Microwave Theory and Techniques 69, no. 9 (2021): 4169–79. http://dx.doi.org/10.1109/tmtt.2021.3081110.

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10

Konkola, Paul T., Carl G. Chen, Ralf K. Heilmann, and Mark L. Schattenburg. "Beam steering system and spatial filtering applied to interference lithography." Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 18, no. 6 (2000): 3282. http://dx.doi.org/10.1116/1.1314385.

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11

Matsumoto, Tad, and Aihua Hong. "On the MMSE Criterion for Space-Time Coded Signaling in the Presence of Unknown Interference." Research Letters in Communications 2007 (2007): 1–3. http://dx.doi.org/10.1155/2007/83283.

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The primary goal of this letter is to provide comparative assessments to the two cases where different criteria are used in joint over antenna minimum mean squared error (JA-MMSE) spatial filtering for space-time coded systems in the presence of unknown interference. It is shown that additional constraints to preserve the space-time coded signal structure in JA-MMSE spatial filtering place floor in bit error rate (BER) performance, while imposing no additional constraint places no error floor.

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12

Liu, Ning, and Thomas Schumacher. "Improved Denoising of Structural Vibration Data Employing Bilateral Filtering." Sensors 20, no. 5 (2020): 1423. http://dx.doi.org/10.3390/s20051423.

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With the continuous advancement of data acquisition and signal processing, sensors, and wireless communication, copious research work has been done using vibration response signals for structural damage detection. However, in actual projects, vibration signals are often subject to noise interference during acquisition and transmission, thereby reducing the accuracy of damage identification. In order to effectively remove the noise interference, bilateral filtering, a filtering method commonly used in the field of image processing for improving data signal-to-noise ratio was introduced. Based o

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13

van, S., and A. J. van der Veen. "Performance analysis of spatial filtering of RF interference in radio astronomy." IEEE Transactions on Signal Processing 53, no. 3 (2005): 896–910. http://dx.doi.org/10.1109/tsp.2004.842177.

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14

Huang, Liang, Shenkai Nong, Xiaofeng Wang, Xiaohang Zhao, Chaoran Wen, and Ting Nie. "Combined Spatial-Spectral Hyperspectral Image Classification Based on Adaptive Guided Filtering." Traitement du Signal 39, no. 2 (2022): 745–54. http://dx.doi.org/10.18280/ts.390240.

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Hyperspectral image classification has a low accuracy in the face of a small training set. To solve the problem, this paper proposes a combined spatial-spectral hyperspectral image classification approach based on adaptive guided filtering. From coarse to fine classification, the local binary pattern (LBP) histogram features were improved, the spatial contrast description was enhanced, and enhanced spatial-spectral features were prepared through Gabor transform of different scales and directions, combined with super pixel blocks. Then, the pre-classification was completed by the support vector

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15

Wang, Weihua, Hanqing Wu, Gao Chen, and Xin Li. "A Distortion-Aware Dynamic Spatial–Temporal Regularized Correlation Filtering Target Tracking Algorithm." Symmetry 17, no. 3 (2025): 422. https://doi.org/10.3390/sym17030422.

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The discriminative correlation filtering target tracking algorithm can achieve a good balance between tracking accuracy and speed, and therefore has attracted much attention in the field of image tracking. The correlation of response maps can be efficiently calculated in the Fourier domain through the input discrete Fourier transform (DFT), where the DFT of the image has symmetry in the Fourier domain. However, most algorithms based on correlation filtering still have unsatisfactory performance in complex scenarios, especially in scenarios with similar background interference, background clutt

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16

Piza, D. M., and S. N. Romanenko. "ADVANCED GRAM-SCHMIDT METHOD FOR RADAR SIGNAL PROCESSING." Radio Electronics, Computer Science, Control, no. 4 (January 5, 2022): 26–33. http://dx.doi.org/10.15588/1607-3274-2021-4-3.

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Context. When protecting radar stations from active noise interference acting along the side lobes of the antenna directional pattern, spatial filtering of signals is used, which is realized by using antennas that are spaced apart in space. In this case, the difference in the directions of reception of the useful signal and the interference makes it possible to form the optimal value of the weighting coefficients of the adaptive spatial filters to suppress the interference. However, if the interfering source moves into the main beam region, then the spatial differences between the wanted signa

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17

Wang, Yi-ming, Xing-peng Mao, Hong Hong, Jie Zhang, and Yu-mei Cui. "A Generalized Oblique Projection Filter with Flexible Parameter for Interference Suppression." International Journal of Antennas and Propagation 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/320769.

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A generalized oblique projection (GOP) with an adjustable parameter defined as interference suppression cost (ISC) is proposed. Therefore, an optional optimized signal to interference-plus-noise ratio (SINR) and user controlled actions on the interference filtering are presented in this GOP framework. Theoretical analysis and numerical simulation demonstrate that when the ISC is derived from minimum variance distortionless response (MVDR) algorithm, the SINR performance of GOP filter is better than both MVDR and oblique projection (OP) filters. Further, an application of GOP filter in ionosphe

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18

Gromilin, G. I., V. P. Kosykh, and N. S. Yakovenko. "Matched Filtering of Small-Sized Objects in Images Containing Constant Spatial Interference." Optoelectronics, Instrumentation and Data Processing 56, no. 4 (2020): 440–47. http://dx.doi.org/10.3103/s8756699020040068.

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19

Gromilin, G. I., V. P. Kosykh, and N. S. Yakovenko. "Matched Filtering of Small-Sized Objects in Images Containing Constant Spatial Interference." Optoelectronics, Instrumentation and Data Processing 56, no. 4 (2020): 440–47. http://dx.doi.org/10.3103/s8756699020040068.

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20

Zhang, Yiheng, Dana H. Brooks, Maria Angela Franceschini, and David A. Boas. "Eigenvector-based spatial filtering for reduction of physiological interference in diffuse optical imaging." Journal of Biomedical Optics 10, no. 1 (2005): 011014. http://dx.doi.org/10.1117/1.1852552.

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21

Gierull, C. H. "Statistical analysis of the eigenvector projection method for adaptive spatial filtering of interference." IEE Proceedings - Radar, Sonar and Navigation 144, no. 2 (1997): 57. http://dx.doi.org/10.1049/ip-rsn:19971075.

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22

Farina, A., and L. Ortenzi. "Effect of ADC and receiver saturation on adaptive spatial filtering of directional interference." Signal Processing 83, no. 5 (2003): 1065–78. http://dx.doi.org/10.1016/s0165-1684(02)00507-8.

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23

Zou, Wendong, Zhangcheng Xu, Xingdao He, and Yiqing Gao. "Near-field spatial frequency filtering model for surface plasmon self-interference virtual probe." Optics Communications 435 (March 2019): 30–34. http://dx.doi.org/10.1016/j.optcom.2018.10.049.

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24

Sardarabadi, Ahmad Mouri, Alle-Jan van der Veen, and Albert-Jan Boonstra. "Spatial Filtering of RF Interference in Radio Astronomy Using a Reference Antenna Array." IEEE Transactions on Signal Processing 64, no. 2 (2016): 432–47. http://dx.doi.org/10.1109/tsp.2015.2483481.

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25

Dettwiller, L., and P. Chavel. "Spatial frequency filtering by interferences and its use in image processing and interference microscopy; theory of compensated interferometers." Journal of Optics 19, no. 4 (1988): 147–55. http://dx.doi.org/10.1088/0150-536x/19/4/001.

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26

Zhou, Yu, Ronggang Cao, Anqi Zhang, and Ping Li. "An Interference Mitigation Method for FMCW Radar Based on Time–Frequency Distribution and Dual-Domain Fusion Filtering." Sensors 24, no. 11 (2024): 3288. http://dx.doi.org/10.3390/s24113288.

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Radio frequency interference (RFI) significantly hampers the target detection performance of frequency-modulated continuous-wave radar. To address the problem and maintain the target echo signal, this paper proposes a priori assumption on the interference component nature in the radar received signal, as well as a method for interference estimation and mitigation via time–frequency analysis. The solution employs Fourier synchrosqueezed transform to implement the radar’s beat signal transformation from time domain to time–frequency domain, thus converting the interference mitigation to the task

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27

Li, Pingzheng, Yanqun Wu, Yanxin Ma, et al. "Prefiltered Striation-Based Beamforming for Range Estimation of Multiple Sources." Journal of Marine Science and Engineering 11, no. 8 (2023): 1550. http://dx.doi.org/10.3390/jmse11081550.

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The element–frequency acoustic intensity of a horizontal line array with a sufficient aperture exhibits interference striation patterns, which can be used for source range estimation without prior environmental information. Under multisource scenarios, the interference striations of the sources overlap with each other, leading to great difficulty in utilizing the information of striations. In this paper, the wavenumber filtering method is applied to each sensor of the horizontal line array to extract the surface-reflected–bottom-reflected modes and reconstruct the recognizable interference spe

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28

Chang, Chung-Liang, and Guo-Shing Huang. "Low-Complexity Spatial-Temporal Filtering Method via Compressive Sensing for Interference Mitigation in a GNSS Receiver." International Journal of Antennas and Propagation 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/501025.

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A compressive sensing based array processing method is proposed to lower the complexity, and computation load of array system and to maintain the robust antijam performance in global navigation satellite system (GNSS) receiver. Firstly, the spatial and temporal compressed matrices are multiplied with array signal, which results in a small size array system. Secondly, the 2-dimensional (2D) minimum variance distortionless response (MVDR) beamformer is employed in proposed system to mitigate the narrowband and wideband interference simultaneously. The iterative process is performed to find optim

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29

Xu, Guangbo. "Small opening cascade synchronous scanning underwater laser fuze using an adaptive backscatter filtering method." Journal of Physics: Conference Series 2478, no. 6 (2023): 062012. http://dx.doi.org/10.1088/1742-6596/2478/6/062012.

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Abstract To alleviate the problem of the low spatial utilization rate of underwater single-beam rotating scanning laser fuzes, a multi-beam rotating scanning fuze structure is proposed in this paper. It was used as a platform to study the interference mechanism of underwater pulsed laser backscatter, and Monte Carlo simulations were performed for typical detection situations of the underwater laser fuze. It was found that the interference echoes resulting from backscatter could even drown the actual target echoes and cause severe interference to the target identification of the fuze. To this e

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30

Fan, Qing, Yun Yu, Liang An, Hongli Cao, and Chuanqi Zhu. "Fast and accurate wideband sparse spatial spectrum estimation in an underwater strong interference environment." Journal of the Acoustical Society of America 154, no. 6 (2023): 3810–20. http://dx.doi.org/10.1121/10.0023934.

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Wideband sparse spatial spectrum estimation is an important direction-of-arrival (DOA) estimation method that can obtain a high resolution with few snapshots and a low signal-to-noise ratio. However, in an underwater strong interference environment, the accuracy of DOA estimation may be seriously affected, and even the weak targets could be completely masked. In this paper, we propose a fast matrix filter design method based on truncated nuclear norm regularization to attenuate strong interferences while passing weak targets. The matrix filter operator and the exact covariance matrix after fil

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31

Liang, Gaofeng, Xi Chen, Qing Zhao, and L. Jay Guo. "Achieving pattern uniformity in plasmonic lithography by spatial frequency selection." Nanophotonics 7, no. 1 (2018): 277–86. http://dx.doi.org/10.1515/nanoph-2017-0028.

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AbstractThe effects of the surface roughness of thin films and defects on photomasks are investigated in two representative plasmonic lithography systems: thin silver film-based superlens and multilayer-based hyperbolic metamaterial (HMM). Superlens can replicate arbitrary patterns because of its broad evanescent wave passband, which also makes it inherently vulnerable to the roughness of the thin film and imperfections of the mask. On the other hand, the HMM system has spatial frequency filtering characteristics and its pattern formation is based on interference, producing uniform and stable

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32

Bhardwaj, Ankur, Sanmukh Kaur, Anand Prakash Shukla, and Manoj Kumar Shukla. "A Novel Method for Despeckling of Ultrasound Images Using Cellular Automata-Based Despeckling Filter." International Journal of E-Health and Medical Communications 12, no. 5 (2021): 16–35. http://dx.doi.org/10.4018/ijehmc.20210901.oa2.

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Ultrasound images have an inherent property termed as speckle noise that is the outcome of interference between incident and reflected ultrasound waves which reduce image resolution and contrast and could lead to improper diagnosis of any disease. In different approaches for reducing the speckle noise, there exists a class of filters that convert multiplicative noise into additive noise by using algorithmic functions. The current study proposes a cellular automata-based despeckling filter (CABDF) that implements a local spatial filtering framework for the restoration of the noisy image. In the

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33

Jia, Fan, Zijing Zhang, Longzhu Cen, Yanhui Sun, and Yuan Zhao. "Same Wavelength Noise Filtering via Quantum Orbital Angular Momentum Emission." Sensors 23, no. 16 (2023): 7118. http://dx.doi.org/10.3390/s23167118.

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In laser active detection, detection performance is affected by optical noise, laser interference, and environmental background interference. Conventional methods to filter optical noise take advantage of the differences between signal and noise in wavelength and polarization. Due to the limitations of traditional methods in the physical dimension, noise cannot be completely filtered out. In this manuscript, a new method of noise filtering based on the spatial distribution difference between the quantum orbital angular momentum beam and the background noise is proposed. The use of beams contai

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34

Wage, Kathleen E., and Bhargabi Chakrabarti. "Design of performance-weighted blended mode filters for underwater experiments." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A356. http://dx.doi.org/10.1121/10.0023783.

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Normal mode signals are valuable in ocean acoustic tomography and source localization, assuming that they can be separated using spatial or temporal filtering. Common spatial mode filters include the matched filter (MF) [Ferris, JASA, 1972] and the pseudo-inverse (PI) filter [Tindle et al., JASA, 1978]. Choosing a filter and its parameters, e.g., the PI filter rank, requires knowledge that is not readily available. For instance, it is unlikely that the levels of ambient noise or interference from other modes is known a priori. To address this problem, Chakrabarti and Wage [IEEE Oceans, 2021, 2

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35

Yao, Cheng-Kai, Amare Mulatie Dehnaw, and Peng-Chun Peng. "A Multi-Format, Multi-Wavelength Erbium-Doped Fiber Ring Laser Using a Tunable Delay Line Interferometer." Applied Sciences 14, no. 16 (2024): 6933. http://dx.doi.org/10.3390/app14166933.

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This work demonstrates the use of an erbium-doped fiber amplifier (EDFA), a tunable bandpass filter (TBF), and a tunable delay line interferometer (TDLI) to form a ring laser that produces multi-format, multi-wavelength laser beams. The TDLI serves as the core of the proposed laser generation system. TDLI harnesses the weak Fabry–Pérot (FP) interferences generated by its built-in 50/50 beamsplitter (BS) with unalterable filtering characteristics and the interferences with free spectral range (FSR) adjustable from each of its two outputs with nearly complementary phases to superpose and generat

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36

Xiao, Zhipeng, Feng He, Zaoyu Sun, and Zehua Zhang. "Mitigation of Suppressive Interference in AMPC SAR Based on Digital Beamforming." Remote Sensing 16, no. 15 (2024): 2812. http://dx.doi.org/10.3390/rs16152812.

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Multichannel Synthetic Aperture Radar (MC-SAR) systems, such as Azimuth Multi-Phase Centre (AMPC) SAR, provide an effective solution for achieving high-resolution wide-swath (HRWS) imaging by reducing the pulse repetition frequency (PRF) to increase the swath width. However, in an Electronic Countermeasures (ECM) environment, the image quality of multichannel SAR systems can be significantly degraded by electromagnetic interference. Previous research into interference and counter-interference techniques has predominantly focused on single-channel SAR systems, with relatively few studies addres

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37

Wang, Yuankai, Liang Jin, Yangming Lou, and Yinuo Hao. "Small Signal Anti-Jamming Scheme Based on a DMA Linear Array under Strong Jamming." Electronics 12, no. 6 (2023): 1389. http://dx.doi.org/10.3390/electronics12061389.

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Considering the difficulty of receiving small signals under strong electromagnetic jamming, this paper proposes a small-signal anti-jamming scheme based on a single dynamic metamaterial antenna (DMA). Our scheme uses the dynamic-adjustable characteristics of the DMA to perform spatial filtering at the antenna radio frequency (RF) front-end, to suppress strong jamming signals in advance and to improve the receiver’s ability to receive and demodulate small signals. Specifically, we take the maximization of signal-to-interference-plus-noise ratio (SINR) as the optimization goal, transform the fra

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38

Liu, Yi, Shanjiao Jiang, Yijin Liu, and Caihong Mu. "Spatial Feature Enhancement and Attention-Guided Bidirectional Sequential Spectral Feature Extraction for Hyperspectral Image Classification." Remote Sensing 16, no. 17 (2024): 3124. http://dx.doi.org/10.3390/rs16173124.

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Hyperspectral images have the characteristics of high spectral resolution and low spatial resolution, which will make the extracted features insufficient and lack detailed information about ground objects, thus affecting the accuracy of classification. The numerous spectral bands of hyperspectral images contain rich spectral features but also bring issues of noise and redundancy. To improve the spatial resolution and fully extract spatial and spectral features, this article proposes an improved feature enhancement and extraction model (IFEE) using spatial feature enhancement and attention-guid

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39

Богословский, А. В., С. Н. Разиньков, Э. В. Сёмка, and А. Б. Буслаев. "APPLYING FIELD PROGRAMMABLE GATE ARRAYS IN SYSTEMS OF MULTICHANNEL DIGITAL PROCESSING OF SATELLITE NAVIGATION SIGNALS." Proceedings in Cybernetics 22, no. 2 (2023): 13–20. http://dx.doi.org/10.35266/1999-7604-2023-2-13-20.

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The study analyzes multichannel digital satellite navigation signal processing systems for unmanned aerial vehicles. To advance interference insusceptibility of navigation equipment on the basis of adaptive change in settings, it is advisable to apply a field programmable gate arrays in order to implement variations of algorithms of signal processing without reconfiguring the equipment’s structure in changes in radioelectronic settings. A navigation complex with the function of interference insusceptibility is developed based on the field programmable gate arrays. It may simultaneously receive

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40

Mu, Shengqiang, Liang Huang, Liying Ren, Guoxu Shu, and Xueliang Li. "Anti-Aliasing and Anti-Leakage Frequency–Wavenumber Filtering Method for Linear Noise Suppression in Irregular Coarse Seismic Data." Minerals 15, no. 2 (2025): 107. https://doi.org/10.3390/min15020107.

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Linear noise, a significant type of interference in exploration seismic data, adversely affects the signal-to-noise ratio (SNR) and imaging resolution. As seismic exploration advances, the constraints of the acquisition environment hinder the ability to acquire seismic data in a regular and dense manner, complicating the suppression of linear noise. To address this challenge, we have developed an anti-aliasing and anti-leakage frequency–wavenumber (f-k) filtering method. This approach effectively mitigates issues of spatial aliasing and spectral leakage caused by irregular coarse data acquisit

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41

Yang, Meijiao, Dong Han, and Ning Li. "Noise Suppression of Towed Line Array Sonar Platform Based on Spatial Filtering Technique." Journal of Physics: Conference Series 2363, no. 1 (2022): 012005. http://dx.doi.org/10.1088/1742-6596/2363/1/012005.

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The problem of interference caused by the radiated noise of the towed line array sonar platform to the hydrophone line array and the formation of detection blind area in the direction of the end head of the line array is addressed. In this paper, the optimal spatial matrix filter is designed using the plane wave array manifold, the platform radiation noise copy vector, and the weighted coefficient matrix. Through iteration of the weighted coefficient matrix, the null matrix filter achieves the effect of equalizing the response of each direction of the far-field plane wave signal under the cond

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42

Wang, Tzu-Kai, Yeh-Wei Yu, Tsung-Hsun Yang, et al. "Depth Image Completion through Iterative Low-Pass Filtering." Applied Sciences 14, no. 2 (2024): 696. http://dx.doi.org/10.3390/app14020696.

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This study introduces a spatial-modulated approach designed to recover missing data in in-depth images. Typically, commercial-grade RGB-D cameras utilize structured light or time-of-flight techniques for capturing scene depth. However, these conventional methods encounter difficulties in acquiring depth data from glossy, transparent, or low-reflective surfaces. Additionally, they are prone to interference from broad-spectrum light sources, resulting in defective areas in the captured data. The generation of dense data is further compromised by the influence of noise. In response to these chall

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43

Lu, Xinghua, Jiahao Huang, and Guohua Luo. "Data detection technology of wireless sensor network based on non-stationary filtering." Journal of Physics: Conference Series 2113, no. 1 (2021): 012023. http://dx.doi.org/10.1088/1742-6596/2113/1/012023.

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Abstract By optimizing the data detection performance of distributed wireless sensor networks, the data sensing and collecting ability of wireless sensor networks can be improved. Traditional methods adopt statistical characteristic parameter detection algorithm for distributed wireless sensor network data detection. Distributed wireless sensor network data has strong time-frequency coupling, so it is difficult to realize frequency domain spatial parameter clustering in frequency domain, and the detection performance is not good. A distributed wireless sensor network data detection algorithm b

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44

Fedosov, Valentin, Andrey Legin, and Anna Lomakina. "Adaptive algorithm for wireless data transmission (including images) based on SISO system and OFDM technique." Serbian Journal of Electrical Engineering 15, no. 3 (2018): 353–64. http://dx.doi.org/10.2298/sjee1803353f.

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The efficiency of wireless systems to transmit information in a complex interference situation is one of the main indicators of the effectiveness of the system, which can be characterized by the probability of an error in the transmitted message. This characteristic depends on the interference situation of the communication channel and the nature of the signals propagation in the medium. If the medium has a multi-path character, the signal interferes with the receiving antenna, causing signal fading. So the developer of wireless communication devices is faced with the task of increasing the no

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45

Nie, Liang, Xu Jiang, Jian Wu, and Rong Li Guo. "Optimization Method of Wavefront Reconstruction Based on Spatial Light Modulator." Advanced Materials Research 601 (December 2012): 209–15. http://dx.doi.org/10.4028/www.scientific.net/amr.601.209.

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To measure the aspheric surface, the reconstruction of the reference wavefront based on spatial light modulator (SLM) is studied in this paper. Computer-generated hologram (CGH) interference encoding method has been selected and the hologram is been loaded into the SLM to reconstruct standard wavefront. The principles of wavefront reconstruction and the experimental system are introduced at first. Considering the effect of the SLM grid structure on wavefront accuracy, the optimization methods are proposed. With the use of 4f spatial filtering system, the multiple diffraction patterns due to th

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46

Schausberger, Stefan E., Bettina Heise, Christian Maurer, Stefan Bernet, Monika Ritsch-Marte, and David Stifter. "Flexible contrast for low-coherence interference microscopy by Fourier-plane filtering with a spatial light modulator." Optics Letters 35, no. 24 (2010): 4154. http://dx.doi.org/10.1364/ol.35.004154.

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47

Kocz, J., F. H. Briggs, and J. Reynolds. "RADIO FREQUENCY INTERFERENCE REMOVAL THROUGH THE APPLICATION OF SPATIAL FILTERING TECHNIQUES ON THE PARKES MULTIBEAM RECEIVER." Astronomical Journal 140, no. 6 (2010): 2086–94. http://dx.doi.org/10.1088/0004-6256/140/6/2086.

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48

Xu, Guojun, Weihua Zhang, Min Zhu, Jizhou Guo, Yanqun Wu, and Jiahua Zhu. "Research on Underwater Acoustic Target Depth Classification Based on Modal Filtering Characteristics of Long Horizontal Line Array." International Journal of Acoustics and Vibration 27, no. 1 (2022): 3–9. http://dx.doi.org/10.20855/ijav.2022.27.11820.

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Considering the problem of depth classification of underwater acoustic targets in shallow water, a classification method based on modal filtering characteristics of long horizontal line array(HLA) beamforming in a negative thermocline environment was proposed. Based on normal mode theory, the spatial filtering characteristics of long HLA are studied by beamforming, and it was found that this characteristic can filter a normal mode. In the negative thermocline environment, the acoustic fields excited by deep and shallow sources and received by deep receivers are controlled by different modes. S

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49

Wang, Binbin, Yuemao Wang, and Yaoqun Xu. "Background-Filtering Feature-Enhanced Graph Neural Networks for Few-Shot Learning." Applied Sciences 14, no. 15 (2024): 6571. http://dx.doi.org/10.3390/app14156571.

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The fundamental idea behind few-shot learning is to employ sparse labeled data to effectively handle novel tasks, whereas most existing mainstream approaches mostly rely on prior experience gained from previous situations. Nonetheless, effective knowledge transfer is sometimes hampered by constraints on new samples and barriers between classes. To address these issues, this research presents a novel background-filtering feature-enhanced graph network (BFFE-GNN) that attempts to generate relationships between graphs in order to explicitly describe and transmit inter-class relationships. To spec

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Fu, Minghui, and Meihong Lin. "Integrity Testing of a Platform-Pile System Using a Sensor Array and Wavenumber Domain Analysis." Advances in Civil Engineering 2022 (July 7, 2022): 1–16. http://dx.doi.org/10.1155/2022/7408393.

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Appropriate impact and sensor locations must be chosen in pile integrity tests to prevent three-dimensional effects caused by the torsional and flexural modes. The three-dimensional characteristics cause high-frequency interference, especially in bridge and wharf piles. A method is required to minimize the high-frequency interference without reducing the accuracy of the pile integrity test. A multivelocity integrity test method is proposed based on a sensor array and frequency-wavenumber (FK) domain analysis to eliminate high-frequency interference and reduce the errors in the output of integr

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