Circuits, Systems and Signal Processing最新文献_第9页

Adaptive Robust Subspace Detection Based on GLRT, Rao, Wald, Gradient, and Durbin Tests 基于 GLRT、Rao、Wald、梯度和 Durbin 检验的自适应鲁棒子空间检测

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02740-z

Gaoqing Xiong, Hui Cao, Weijian Liu, Jun Liu, Chongying Qi, Daikun Zheng

引用次数: 0

Multiplier-less Broadband and Linear Phase Digital Hilbert Transformers 无乘法器宽带和线性相位数字希尔伯特变压器

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02682-6

Hans Georg Brachtendorf, Christoph Dalpiaz, Martin Steiger

{"title":"Multiplier-less Broadband and Linear Phase Digital Hilbert Transformers","authors":"Hans Georg Brachtendorf, Christoph Dalpiaz, Martin Steiger","doi":"10.1007/s00034-024-02682-6","DOIUrl":"https://doi.org/10.1007/s00034-024-02682-6","url":null,"abstract":"The Hilbert transformation for generating the analytic signal or signal envelope is widely used in modern communication receivers, in radar and sonar systems. It introduces a (90^{circ }) phase shift of the input signal. Since the impulse response of the ideal Hilbert transformer is non-causal, it must be approximated by an FIR or IIR filter. This paper shows results of novel algorithms for designing broadband digital IIR Hilbert transformers and its implementation. The designs employ Galerkin or collocation techniques. The transfer function of the Hilbert transformer is a rational polynomial of low order and exhibits approximately linear phase. The filters match the (90^{circ }) phase shift requirement of Hilbert transformers almost perfectly and exhibit approximately constant group delay in the passband. The achieved image rejection ratio is typically larger than 50 dB. The quantization of the filter coefficients is realized by a Canonical Signed Digit (CSD) representation, reducing the hardware resources compared with two’s complement. The resulting filters are multiplier-less, which is crucial for high-speed signal processing and low power consumption. The design techniques and the CSD representation are realized in a MATLAB toolbox. The filters were moreover implemented in VHDL and SystemC. Additionally, a MATLAB tool for automatically generating a VHDL package containing the filter parameters has been implemented.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"20 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531318","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 Equalizer Based on New Lower-Order Statistic Under Impulsive Noise Cases 基于脉冲噪声情况下新低阶统计量的鲁棒均衡器

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02755-6

Xuejun Zhang, Limin Lei, Dazheng Feng, Juan Wu

引用次数: 0

Observer-Based Finite-Time Adaptive Fault-Tolerant Control for Nonlinear System with Unknown Time-Varying Delay 针对具有未知时变延迟的非线性系统的基于观测器的有限时间自适应容错控制

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02756-5

Hua Chen, Yao Tang, Rui Xu, Xinyuan Long, Yang Zhao

{"title":"Observer-Based Finite-Time Adaptive Fault-Tolerant Control for Nonlinear System with Unknown Time-Varying Delay","authors":"Hua Chen, Yao Tang, Rui Xu, Xinyuan Long, Yang Zhao","doi":"10.1007/s00034-024-02756-5","DOIUrl":"https://doi.org/10.1007/s00034-024-02756-5","url":null,"abstract":"In the fault-tolerant control tasks of nonlinear systems, unmeasurable states, time delay and actuator faults are considered to be the main factors hindering effective controller design and tracking performance improvement. To solve these problems, firstly, a state observer is established to estimate the unmeasurable of the system and the prescribed performance control based on error transformation is presented to maintain system efficiency and reliability. Secondly, the problem of controller design caused by input delay is effectively solved by constructing an auxiliary tracking error and auxiliary system and combining with the well-designed Lyapunov-Krasovskii functionals. Thirdly, the newly employed damping term in the intermediate control law is utilized to compensate for the possibly unlimited number of faults. Then, it is proved that all signals are semi-global practical finite-time stable based on the backstepping technique. Meanwhile, the tracking error can converge to a specified range within finite time. Finally, comparative simulations are presented to demonstrate the effectiveness of the proposed method.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"25 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502770","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

Optimized Adaptive Filter for Powerline Interference Cancellation in Electrocardiogram Signal Using a Modified Lightning Search Algorithm 使用改进的闪电搜索算法消除心电图信号中的电力线干扰的优化自适应滤波器

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02766-3

Vinoth murugan, Damodar Panigrahy

{"title":"Optimized Adaptive Filter for Powerline Interference Cancellation in Electrocardiogram Signal Using a Modified Lightning Search Algorithm","authors":"Vinoth murugan, Damodar Panigrahy","doi":"10.1007/s00034-024-02766-3","DOIUrl":"https://doi.org/10.1007/s00034-024-02766-3","url":null,"abstract":"Powerline interference (PLI) more frequently affects the electrocardiogram (ECG) signal during the recording and acquisition. This paper proposes a unique method for suppressing the PLI in the ECG signal using an adaptive filter (AF) with a modified lightning search algorithm (MLSA). The MLSA approach automatically updates the filter coefficient weights to minimize the error between the noisy ECG signal and the filter output. The input signal of a filter is also optimized based on the error signal using MLSA. The proposed methodology's effectiveness is verified by adding PLI noise to the ECG records from the MIT-BIH arrhythmia database at different signal-to-noise ratios (SNRs). The potency of the proposed methodology is assessed by evaluation metrics, namely SNR improvement, mean square error (MSE), mean absolute error (MAE), percentage of root-mean-square difference (PRD), Huber loss (HL), and the correlation coefficient (CC). The results of the proposed methods outperform the existing techniques of empirical mode decomposition, variational mode decomposition with a non-local mean approach, empirical wavelet transform, variational mode decomposition with a variable notch filter, and an AF with the least mean square (LMS) approach in terms of evaluation metrics and visual observation.","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"133 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518688","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

Teaching Learning Based Optimization for Designing Control Strategies in Complex Systems 基于学习的优化教学，设计复杂系统中的控制策略

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02753-8

M. Mehrotra, A. Sikander

引用次数: 0

Output-Based Adaptive Event-Triggered Control of Saturated Systems with Dynamic Anti-Windup Compensator 带动态防风补偿器的饱和系统的基于输出的自适应事件触发控制

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02765-4

Li Hongchao, Jiang Qiancheng, Deng Huimin, Liu Jiao

引用次数: 0

Tonic Pitch Estimation in Turkish Music Using Modified Group Delay Processing 利用修改后的群延迟处理技术估算土耳其音乐中的调式音高

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-29 DOI: 10.1007/s00034-024-02759-2

Rajan Rajeev, M. A. Aiswarya

引用次数: 0

Spoken Language Change Detection Inspired by Speaker Change Detection 受说话者变化检测启发的口语变化检测

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-17 DOI: 10.1007/s00034-024-02743-w

Jagabandhu Mishra, S. R. M. Prasanna

{"title":"Spoken Language Change Detection Inspired by Speaker Change Detection","authors":"Jagabandhu Mishra, S. R. M. Prasanna","doi":"10.1007/s00034-024-02743-w","DOIUrl":"https://doi.org/10.1007/s00034-024-02743-w","url":null,"abstract":"Spoken language change detection (LCD) refers to identifying the language transitions in a code-switched utterance. Similarly, identifying the speaker transitions in a multispeaker utterance is known as speaker change detection (SCD). Since tasks-wise both are similar, the architecture/framework developed for the SCD task may be suitable for the LCD task. Hence, the aim of the present work is to develop LCD systems inspired by SCD. Initially, both LCD and SCD are performed by humans. The study suggests humans require (a) a larger duration around the change point and (b) language-specific prior exposure, for performing LCD as compared to SCD. The larger duration requirement is incorporated by increasing the analysis window length of the unsupervised distance-based approach. This leads to a relative performance improvement of (29.1%) and (2.4%), and a priori language knowledge provides a relative improvement of (31.63%) and (4.01%) on the synthetic and practical codeswitched datasets, respectively. The performance difference between the practical and synthetic datasets is mostly due to differences in the distribution of the monolingual segment duration.\u0000","PeriodicalId":10227,"journal":{"name":"Circuits, Systems and Signal Processing","volume":"3 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502771","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

Hermite Expansion Technique for Model Reduction of Circuit Systems with Delay Components 利用赫米特展开技术减少带有延迟成分的电路系统模型

IF 2.3 3区工程技术

Circuits, Systems and Signal Processing Pub Date : 2024-06-16 DOI: 10.1007/s00034-024-02750-x

Zhi-Yong Qiu, Zhen-Hua Guo, Yao-Lin Jiang, Ya-Qian Zhao, Ren-Gang Li

引用次数: 0