A Novel Linear Filter for Incremental Delta-Sigma ADC Based on Modified Least Squares AlgorithmCircuits, Systems, and Signal Processing - - 2024
Wang Yuqi, Wang Haiyong
This paper introduces a novel algorithm for optimizing the coefficients of the digital filters used in incremental delta-sigma analog-to-digital converters (IDSC). This algorithm is modified from constrained linear least squares (LS) to improve the signal-to-noise-and-distortion ratio (SNDR) of IDSC and minimize the oversampling rate (OSR) of the modulator, which enhances system speed and reduces ...... hiện toàn bộ
Genetic Watermarking for Zerotree-Based ApplicationsCircuits, Systems, and Signal Processing - Tập 27 - Trang 171-182 - 2008
Shu-Chuan Chu, Hsiang-Cheh Huang, Yan Shi, Ssu-Yi Wu, Chin-Shiuh Shieh
An optimized scheme for watermarking based on zerotrees is proposed in this paper. Digital watermarking is an effective means for protecting copyrights with three of the most fundamental requirements: watermark imperceptibility, watermark robustness, and watermark capacity. Conventional techniques in the literature mainly perform watermark embedding and extraction processes in the transform domain...... hiện toàn bộ
Nonplanar switchable arraysCircuits, Systems, and Signal Processing - - 1988
J. L. Aravena, W. A. Porter
On-line signal processing and automatic control applications give rise to numerous examples of computationally intense algorithms. Architectures which are algorithmically specialized and provide massive parallelism are necessary to cope with such computational requirements. Systolic arrays, which feature parallelism, local communications, and VLSI compatability appear to match up well with these c...... hiện toàn bộ
Least Squares Identification for Hammerstein Multi-input Multi-output Systems Based on the Key-Term Separation TechniqueCircuits, Systems, and Signal Processing - Tập 35 - Trang 3745-3758 - 2015
Qianyan Shen, Feng Ding
System modeling and parameter estimation are basic for system analysis and controller design. This paper considers the parameter identification problem of a Hammerstein multi-input multi-output (H-MIMO) system. In order to avoid the product terms in the identification model, we derive a pseudo-linear identification model of the H-MIMO system through separating a key term from the output equation o...... hiện toàn bộ
An Analysis Method for Solving Ambiguity in Direction Finding with Phase InterferometersCircuits, Systems, and Signal Processing - Tập 40 - Trang 1420-1437 - 2020
Lutao Liu, Tao Yu
The phase interferometer is an effective direction finding (DF) method. It is widely utilized in various electronic reconnaissance systems due to its advantages of fast operation and high precision. In a wideband system, the combination of long and short baselines, or even multi-level baselines, is applied in an interferometer to solve the contradiction between accuracy and phase ambiguity for DF....... hiện toàn bộ
Four-Channel Tight Wavelet Frames Design Using Bernstein PolynomialCircuits, Systems, and Signal Processing - Tập 31 - Trang 1847-1861 - 2012
Ping Zhao, Chun Zhao
The paper provides a novel technique for designing tight frame wavelet filters through the use of Bernstein polynomials. The perfect-reconstruction conditions of tight wavelet frame filters are established by using parameters of the Bernstein polynomials. The desired number of vanishing moments can be easily achieved by setting the appropriate parameters of the Bernstein polynomial to zero. The fi...... hiện toàn bộ
VLSI-Based Pipeline Architecture for Reversible Image Watermarking by Difference Expansion with High-Level Synthesis ApproachCircuits, Systems, and Signal Processing - Tập 37 - Trang 1575-1593 - 2017
Subhajit Das, Reshmi Maity, N. P. Maity
The paper focuses on the VLSI-based digital design and implementation of reversible image watermarking (RIW) architecture using difference expansion (DE). Mathematical simplicity of using a set of linear transformations leads to the choice of DE-based technique for developing hardware design. Moreover, its high performance gain in terms of payload capacity and the visual quality of the watermarked...... hiện toàn bộ