Results 61 to 70 of about 37,640 (313)

Improved SR-SSIM Band Selection Method Based on Band Subspace Partition

open access: yesRemote Sensing, 2023
Scholars have performed much research on reducing the redundancy of hyperspectral data. As a measure of the similarity between hyperspectral bands, structural similarity is used in band selection methods.
Tingrui Hu   +3 more
doaj   +1 more source

SSA of biomedical signals: A linear invariant systems approach

open access: yes, 2010
Singular spectrum analysis (SSA) is considered from a linear invariant systems perspective. In this terminology, the extracted components are considered as outputs of a linear invariant system which corresponds to finite impulse response (FIR) filters ...
Figueiredo, Nuno   +7 more
core   +1 more source

Blind Channel Estimation Using Redundant Precoding: New Algorithms, Analysis, and Theory [PDF]

open access: yes, 2008
Digital signal processing (DSP) techniques have played an important role in channel equalization and estimation in communication systems. While channel equalization and estimation are usually done by pilot-assisted methods in most systems, algorithms for
Su, Borching
core   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

open access: yesAdvanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang   +9 more
wiley   +1 more source

Improving the convergence property of DFE using the deterministic blind channel estimation

open access: yesTongxin xuebao, 2005
A blind decision feedback equalizer (DFE) algorithm was proposed. The subspace method which was based on the second-order statistics (SOS) was employed to give the parametric estimation of channels unsupervised.
QIAO Yan-tao, ZHANG Li-jun
doaj  

Modal Parameter Identification of a Structure Under Earthquake via a Wavelet-Based Subspace Approach

open access: yesApplied Sciences
This paper introduces a novel wavelet-based methodology for identifying the modal parameters of a structure in the aftermath of an earthquake. Our proposed approach seamlessly combines a subspace method with a stationary wavelet packet transform.
Wei-Chih Su   +2 more
doaj   +1 more source

PLS Subspace-Based Calibration Transfer for Near-Infrared Spectroscopy Quantitative Analysis

open access: yesMolecules, 2019
In order to enable the calibration model to be effectively transferred among multiple instruments and correct the differences between the spectra measured by different instruments, a new feature transfer model based on partial least squares regression ...
Yuhui Zhao   +5 more
doaj   +1 more source

Novel algorithms in wireless CDMA systems for estimation and kernel based equalization [PDF]

open access: yes, 2012
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.A powerful technique is presented for joint blind channel estimation and carrier offset method for code- division multiple access (CDMA) communication ...
Vlachos, Dimitrios
core  

Ion‐Gating Reservoir Computing for Preprocessing‐Free Speech Recognition from Throat Vibrations

open access: yesAdvanced Electronic Materials, EarlyView.
This work presents a throat‐mounted mechanoelectric sensor integrated with an ion‐gel/graphene reservoir device for on‐device speech recognition. The system converts raw biomechanical vibrations into rich nonlinear current dynamics, enabling efficient classification through a simple linear readout. The approach highlights a compact and tunable physical‐
Daiki Nishioka   +5 more
wiley   +1 more source

Blind reception for multi-antenna ultra-wideband transmissions

open access: yesTongxin xuebao, 2006
A blind linear receiver for multi-antenna impulse radio ultra-wideband(UWB)communication systems was proposed.Without the need of channel information,specific properties of the received data imposed by the precoded space-time block codes(STBC)could be ...
CHENG Xian-tao, ZHU Wei-le
doaj  

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