A novel gradient adaptive step size LMS algorithm with dual adaptive filters

Jiao, Yuzhong; Cheung, Rex Y. P.; Chow, W.W.Y.; Mok, Mark P. C.

doi:10.1109/embc.2013.6610622

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…The program iteratively altered the length of the comparison stimulus to converge with the standard stimulus, contingent on the participants' choices. An enhanced variable step size least mean square adaptive algorithm (Jiao et al, 2013) was implemented to regulate the length adjustments. Each threshold data point entailed a minimum of 20 trials when the standard deviation of the most recent five trials fell below 0.7 times the minimum length step size (McKelvie, 1984;Plesch et al, 2019).…”

Section: Apparatus and Proceduresmentioning

confidence: 99%

Low vision aids and age are associated with Müller-Lyer illusion in congenital visually impaired children

Lin,

Chen,

Yang

et al. 2023

Front. Psychol.

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BackgroundThe correlation between visual impairment and Müller-Lyer illusion is not yet elucidated. This study aimed to explore the connection between visual status, age, and the intensity of Müller-Lyer illusion in congenitally visually impaired and visually healthy children aged 4–17 years. Additionally, the developmental trends were compared.MethodsThis cross-sectional study included 125 visually impaired children (age: 10.59 ± 4.05 years), among them, 53 had utilized low vision aids (LVAs) and 133 healthy controls (age: 11.33 ± 3.39 years). The participants were presented with Müller-Lyer illusion stimuli via binocular and engaged in a two-alternative forced choice task to quantify the illusion intensity. Pertinent factors including age, gender, residence, binocular distant best-corrected visual acuity and LVAs usage history, were assessed.ResultsThe visually impaired group exhibited significantly elevated illusion intensity compared to the healthy group (9.74 ± 2.89% vs. 5.42 ± 3.81%, p < 0.001), and visually impaired participants who had used LVAs exhibited significantly lower intensity compared to those had not (9.13 ± 3.00% vs. 10.19 ± 2.74%, p = 0.043). Multivariate generalized estimation equations revealed that visual impairment [odds ratio (OR) = 2.75, p < 0.001] and age (OR = 0.60, p < 0.001) were associated with illusion intensity in all participants, while history of LVAs usage (OR = 0.49, p = 0.045) and age (OR = 0.61, p < 0.001) were negatively correlated in visually impaired group. A significantly negative correlation was found between illusion intensity and age 4–17 years in the subgroups of visually impaired who had used LVAs (Y = −0.54X + 15.06, R2 = 0.56), who had not used (Y = −0.49X + 15.24, R2 = 0.51), and healthy controls (Y = −0.50X + 11.18, R2 = 0.21); all p-values were < 0.001.ConclusionChildren aged 4–17 years afflicted with congenital visual impairment exhibited a heightened intensity of Müller-Lyer illusion compared to visually normal counterparts, LVAs usage experience could reduce this higher intensity. The developmental trajectory of illusion intensity declined consistently with age across all three groups. The abnormal visual experiences during early-life may adversely affect integration in congenitally visually impaired children, and LVAs could facilitate this functional development.

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Section: Apparatus and Proceduresmentioning

confidence: 99%

Low vision aids and age are associated with Müller-Lyer illusion in congenital visually impaired children

Lin,

Chen,

Yang

et al. 2023

Front. Psychol.

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“…Adaptive filter [6] is widely used because it has the ability of well operation and tracking the variable input statistics in the unknown time-varying environment. Adaptive filtering is defined according to the changes in the environment, by using a kind of adaptive algorithm to change the filter parameters.…”

Section: Adaptive Filteringmentioning

confidence: 99%

High Precision Time Synchronization Algorithm for Smart Grid Based on Adaptive Filtering with Modified Particle Swarm Optimization

Han

Shen

2013

AMR

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The time synchronization network provides time benchmark tasks for various services in electric power system. With the development of the power grid, the applications require more and more accurate time synchronization precision. In this paper, a method of time synchronization based on adaptive filtering with a modified particle swarm optimization (MPSO-AF) was presented to satisfy the high precision and high security requirements of the time synchronization for smart grid. The modified PSO was introduced for tuning the weight coefficients of the adaptive filter to improve the filtering property. The proposed MPSO-AF hybrid algorithm can combine the advantageous properties of the modified PSO and the adaptive filtering algorithm to enhance the performance of the time synchronization. A comparison of simulation results shows the optimization efficacy of the algorithm.

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“…where μ(n) is the step size of the LMS algorithm, which controls the convergence rate [8]. The update equation of Mathew's algorithm for step size μ(n) is shown in (5) [8].…”

mentioning

confidence: 99%

“…where ρ is a small positive constant which controls the adaptive behaviour of step size [8]. For updating the proposed method,…”

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confidence: 99%

Approach to localisation of Lee model in mountainous areas

Lee

2018

Electron. lett.

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For the path loss prediction in mountainous areas, a method is proposed to adjust the Lee model with diffraction methods using a variable step-size least mean square algorithm. Measurements were conducted in mountain areas to compare the prediction performances. The prediction performances were improved by up to 2.76 dB in the average error and 0.96 dB in the standard deviation of errors by the proposed method when compared to non-tuned Lee and Joint Radio Company (JRC) models with diffraction methods.

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A novel gradient adaptive step size LMS algorithm with dual adaptive filters

Cited by 7 publications

References 9 publications

Low vision aids and age are associated with Müller-Lyer illusion in congenital visually impaired children

Low vision aids and age are associated with Müller-Lyer illusion in congenital visually impaired children

High Precision Time Synchronization Algorithm for Smart Grid Based on Adaptive Filtering with Modified Particle Swarm Optimization

Approach to localisation of Lee model in mountainous areas

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