Circuits, Systems and Signal Processing最新文献_第2页

An Evaluation of Dimensionality Reduction and Classification Techniques for Cardiac Disease Diagnosis from ECG Signals with Various Deep Learning Classifiers 利用各种深度学习分类器评估从心电图信号诊断心脏病的降维与分类技术

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-09-06 DOI: 10.1007/s00034-024-02845-5

S. Karthikeyani, S. Sasipriya, M. Ramkumar

{"title":"An Evaluation of Dimensionality Reduction and Classification Techniques for Cardiac Disease Diagnosis from ECG Signals with Various Deep Learning Classifiers","authors":"S. Karthikeyani, S. Sasipriya, M. Ramkumar","doi":"10.1007/s00034-024-02845-5","DOIUrl":"https://doi.org/10.1007/s00034-024-02845-5","url":null,"abstract":"Classification of cardiac diseases from electrocardiogram signals is essential for enhancing patient results to minimize healthcare costs, early detection and accurate diagnosis. This research investigates the integration of dimensionality reduction methods with various deep learning classifiers to improve the accuracy and efficient classification of cardiac disease. Uniform Manifold Approximation and Projection combined with Principal Component Analysis is used for dimensionality reduction, that captures both global and local data structures. Deep learning classifiers with convolutional neural networks, capsule networks, recurrent neural networks, graph neural networks, deep long short-term memory and automatical attention-based convolutional neural networks are employed for classification. The Adaptive spiral Flying Sparrow Search algorithm optimizes classifier parameters for enhance accuracy. Performance is evaluated through various metrics, with area under the receiver operating characteristic curve, accuracy, F1-Score, precision and recall. The proposed method's outcomes are compared with and without optimization to demonstrate the efficiency and attains 92.16%, 96.15%, 91.95%, 94.65%, 91.45% and 92.85% accuracy respectively for each classification method.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"6 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Channel Parameter Estimation in the Presence of Phase Noise Based on Maximum Correntropy Criterion 基于最大熵准则的相位噪声情况下的信道参数估计

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-09-06 DOI: 10.1007/s00034-024-02849-1

Amir Alizadeh, Saeid Pakravan, Ghosheh Abed Hodtani

{"title":"Channel Parameter Estimation in the Presence of Phase Noise Based on Maximum Correntropy Criterion","authors":"Amir Alizadeh, Saeid Pakravan, Ghosheh Abed Hodtani","doi":"10.1007/s00034-024-02849-1","DOIUrl":"https://doi.org/10.1007/s00034-024-02849-1","url":null,"abstract":"Phase noise (PN) is a prevalent challenge in oscillator-driven systems, leading to spectral dispersion of the power spectral density (PSD) around a Dirac delta function. This paper addresses the task of estimating a communication channel affected by additive white Gaussian noise (AWGN) and phase noise. Traditional estimation methods such as the least mean square (LMS) and mean square error (MSE) criteria are deemed inadequate due to the unique characteristics of phase noise. In this study, we propose a novel approach for PN channel estimation utilizing information-theoretic learning (ITL) principles, specifically focusing on the maximum correntropy criterion (MCC). By employing MCC, our method enhances the robustness of the channel estimator in steady-state conditions, thereby improving the accuracy of parameter estimation. Additionally, to expedite the convergence rate of our algorithm, we introduce a novel mixed-LMS approach that amalgamates elements of both MSE and MCC. This hybrid technique leverages the strengths of each criterion, resulting in a more efficient and accurate estimation of the PN-affected channel. Through comprehensive analysis and experimentation, our proposed method demonstrates its effectiveness in mitigating the impact of phase noise on channel estimation.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"21 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Affine Projection Algorithms with Novel Schemes of Variable Projection Order 采用可变投影阶次新方案的仿射投影算法

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-09-03 DOI: 10.1007/s00034-024-02829-5

Lin Luo, Yi Yu, Tao Yang, Ke Li, Hongsen He

引用次数: 0

An Underwater Velocity-Independent DOA Estimation Method Based on Cascaded Neural Network 基于级联神经网络的与速度无关的水下 DOA 估算方法

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-09-02 DOI: 10.1007/s00034-024-02838-4

Sihan Yuan, Gengxin Ning, Yushen Lin

引用次数: 0

Nonlinear Analyses of Unsymmetrical Locking Range of Injected Cross-Coupled Oscillator 注入式交叉耦合振荡器非对称锁定范围的非线性分析

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-09-02 DOI: 10.1007/s00034-024-02834-8

Armin Mohammadjany, Ali Reza Hazeri, Hossein Miar-Naimi

{"title":"Nonlinear Analyses of Unsymmetrical Locking Range of Injected Cross-Coupled Oscillator","authors":"Armin Mohammadjany, Ali Reza Hazeri, Hossein Miar-Naimi","doi":"10.1007/s00034-024-02834-8","DOIUrl":"https://doi.org/10.1007/s00034-024-02834-8","url":null,"abstract":"In this article, two accurate nonlinear methods are proposed to calculate non-symmetrical locking ranges of the Injected Cross-Coupled Oscillator (ICCO) with the parallel RLC tank and series RL with a parallel C tank for both weak and strong injection levels. By writing governing differential equations of circuit elements of the ICCO, graphical presenting of current vectors, and using the averaging method for solving nonlinear equations, equations of the ICCO are simplified. Then, exact non-symmetrical locking ranges are calculated using the iterative method. Moreover, the describing function of the oscillator’s nonlinear part, an inverse tangent function, is applied to the model. The inverse tangent function generates complicated governing differential equations of circuit elements that are accurate. Then, it is solved to ICCO for the first time and has novel results for calculating non-symmetrical locking ranges. There is a good agreement between theoretical and simulation results. The proposed non-symmetrical locking ranges are accurate in both weak and strong injections. The absolute percent of errors for various levels of the injection signal is less than 20%. In the bargain, proposed locking ranges are the most accurate compared to previously published results.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"20 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust Total Least Mean M-Estimate Normalized Subband Filter Adaptive Algorithm Under EIV Model in Impulsive Noise 脉冲噪声中 EIV 模型下的稳健总最小均值 M 估计归一化子带滤波器自适应算法

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-09-02 DOI: 10.1007/s00034-024-02841-9

Haiquan Zhao, Zian Cao, Yida Chen

引用次数: 0

Model Order Reduction Strategy for LTI Systems and Application to PID Controller Design LTI 系统的模型阶数缩减策略及其在 PID 控制器设计中的应用

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-08-27 DOI: 10.1007/s00034-024-02825-9

Bala Bhaskar Duddeti

{"title":"Model Order Reduction Strategy for LTI Systems and Application to PID Controller Design","authors":"Bala Bhaskar Duddeti","doi":"10.1007/s00034-024-02825-9","DOIUrl":"https://doi.org/10.1007/s00034-024-02825-9","url":null,"abstract":"The mathematical modeling of the real-time system results in large-dimensional ordinary or partial differential equations, which are challenging to employ for investigation and control synthesis. Finding a comparable system of the same kind in a lower-order dimension that can maintain the core characteristics of the higher-order system (HOS) is essential. This article discusses a novel technique for HOS’s reduced order approximation and control design. The proposed method modifies the Schur method for balanced truncation. The method circumvents the requirement of balancing transformation and steady-state gain (SSG) deviation as required in the truncated model reduction algorithm. The offered technique eliminates the SSG deviation without altering the dynamical behavior compared to the HOS by appending a gain enhancement factor to the numerator polynomial of the reduced system transfer matrix. The offered technique ensures that the reduced system retains the HOS stability, passivity, SSG, and all critical characteristics. The recommended method’s findings are compared to the outcomes of recently published work’s lower-order models. Further, using the proposed method, the reduced model has been used to design a PID controller for the flexible-missile control model and an automatic voltage regulator system. The controller produced using the simplified model provides almost the exact time domain specifications (TDS) as the controller made using the HOS, and its design is also relatively more straightforward. Step response and TDS assess lower- and higher-order controller performance.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"284 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Moth Flame Optimization for Model Order Reduction of Complex High Order Linear Time-Invariant Systems 飞蛾火焰优化法用于减少复杂高阶线性时不变系统的模型阶数

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-08-26 DOI: 10.1007/s00034-024-02800-4

Anuj Goel, Amit Kumar Manocha

{"title":"Moth Flame Optimization for Model Order Reduction of Complex High Order Linear Time-Invariant Systems","authors":"Anuj Goel, Amit Kumar Manocha","doi":"10.1007/s00034-024-02800-4","DOIUrl":"https://doi.org/10.1007/s00034-024-02800-4","url":null,"abstract":"The moth flame optimization (MFO) method has been introduced as a means to approximate single–input–single–output (SISO) complex high-order linear time-invariant systems (CHOLTIS). Initially, the unknown parameters within the denominator and numerator of the reduced-order linear time-invariant system (ROLTIS) are determined through balanced truncation. This process establishes the initial values of the parameters for MFO. To confine the exploration space of MFO around the coefficients derived from the balanced truncated model, a strategic constant is employed. This constant defines the lower and upper bounds, effectively constraining the search area of MFO. Consequently, MFO can focus its optimization efforts within a targeted range, improving efficiency and efficacy. The optimization process with MFO is then applied to fine-tune the unknown parameters of the ROLTIS. Through iterative optimization, MFO adjusts these parameters to minimize the error between the step response of CHOLTIS and the desired ROLTIS. This iterative process ensures that the resulting reduced-order system closely approximates the original high-order system. Moreover, to enhance the accuracy of the approximation, a gain adjustment factor is introduced after the optimization process. This factor enables the ROLTIS to match the steady-state response with that of the CHOLTIS. By fine-tuning the gain, the methodology ensures that the reduced-order system maintains consistent behavior with the original system under steady-state conditions. The efficacy of the proposed methodology is validated by applying it to four distinct high-order systems sourced from the literature. These systems encompass various configurations, including those with only real poles, real and imaginary poles, and repeated poles. Through testing on variety of systems, the proposed methodology consistently produces optimal and stable reduced-order systems with the lowest error indices, demonstrating its versatility and reliability across different system types and complexities.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"28 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MOSFET-only Meminductor Emulator and its Application in Chaotic Oscillator 纯 MOSFET Meminductor 仿真器及其在混沌振荡器中的应用

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-08-23 DOI: 10.1007/s00034-024-02833-9

Aashish Kumar, Shireesh Kumar Rai

{"title":"MOSFET-only Meminductor Emulator and its Application in Chaotic Oscillator","authors":"Aashish Kumar, Shireesh Kumar Rai","doi":"10.1007/s00034-024-02833-9","DOIUrl":"https://doi.org/10.1007/s00034-024-02833-9","url":null,"abstract":"In this paper, a grounded meminductor emulator has been proposed using six MOSFETs (3NMOS and 3PMOS) only. Three transconductance stages and two capacitors are generally required to realize a meminductor emulator. Meminductor is considered as an inductor having memory. In the proposed design of meminductor emulator, the gyrator circuit is realized using common-source and common-gate amplifiers with one capacitor. The first capacitor is used to obtain the behaviour of inductance while the second capacitor is used for charge storage which acts as a memory element. In the proposed design of meminductor emulator, the gate-to-source capacitor of MOSFET is utilized in place of external capacitor for memory element. Therefore, the proposed design is free from the requirement of passive components as the required capacitor is formed by MOSFET. Also, the frequency characteristics of proposed meminductor are found to be satisfactory up to 100 MHz. The other essential characteristics such as non-volatility test, temperature analysis, tunability, Monte Carlo, and corner analysis are also found to be satisfactory. The proposed design of meminductor emulator is compared with other existing meminductor emulators. The performance of the emulator is successfully verified through the realization of chaotic oscillator circuit.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"11 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-Sparse Parallel Nested Array for Two-Dimensional Direction of Arrival Estimation 用于二维到达方向估计的双解析平行嵌套阵列

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-08-23 DOI: 10.1007/s00034-024-02816-w

Guojun Jiang, Jiacheng Huang, Yunlong Yang

引用次数: 0