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Channel Estimation for OFDM Systems over Doubly Selective Channels: A Distributed Compressive Sensing Based Approach.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Communications. Oct2013, Vol. 61 Issue 10, p4173-4185. 13p.
Abstract: Channel estimation for an orthogonal frequency-division multiplexing (OFDM) broadband system over a doubly selective channel is very challenging. This is mainly due to the significant Doppler shift, which results in a time-frequency doubly-selective (D...
Identifying the Neuroanatomical Basis of Cognitive Impairment in Alzheimer's Disease by Correlation- and Nonlinearity-Aware Sparse Bayesian Learning.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Medical Imaging. Jul2014, Vol. 33 Issue 7, p1475-1487. 13p.
Abstract: Predicting cognitive performance of subjects from their magnetic resonance imaging (MRI) measures and identifying relevant imaging biomarkers are important research topics in the study of Alzheimer's disease. Traditionally, this task is performed by fo...
Statistical Personalization of Ventricular Fiber Orientation Using Shape Predictors.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Medical Imaging. Apr2014, Vol. 33 Issue 4, p882-890. 9p.
Abstract: This paper presents a predictive framework for the statistical personalization of ventricular fibers. To this end, the relationship between subject-specific geometry of the left (LV) and right ventricles (RV) and fiber orientation is learned statistica...
Low-Sampling-Rate Ultra-Wideband Channel Estimation Using Equivalent-Time Sampling.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Signal Processing. Sep2014, Vol. 62 Issue 18, p4882-4895. 14p.
Abstract: In this paper, a low-sampling-rate scheme for ultra-wideband channel estimation is proposed. The scheme exploits multiple observations generated by transmitting multiple pulses. In the proposed scheme, P pulses are transmitted to produce channel impuls...
Forest Sparsity for Multi-Channel Compressive Sensing.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Signal Processing. Jun2014, Vol. 62 Issue 11, p2803-2813. 11p.
Abstract: In this paper, we investigate a new compressive sensing model for multi-channel sparse data where each channel can be represented as a hierarchical tree and different channels are highly correlated. Therefore, the full data could follow the forest stru...
Low-Complexity Motion-Compensated Beamforming Algorithm and Architecture for Synthetic Transmit Aperture in Ultrasound Imaging.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Signal Processing. Feb2014, Vol. 62 Issue 4, p840-851. 12p.
Abstract: Synthetic transmit aperture (STA) has been widely investigated in ultrasound system recently with characteristics of high frame rate and low hardware cost. Since the high-resolution image (HRI) of STA is formed by summation of low-resolution images (LR...
Leakage-Based Robust Beamforming for Multi-Antenna Broadcast System With Per-Antenna Power Constraints and Quantized CDI.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Signal Processing. Nov2013, Vol. 61 Issue 21, p5181-5192. 12p.
Abstract: In this paper, we investigate the robust beamforming schemes for a multi-user multiple-input-single-output (MU-MISO) system with per-antenna power constraints and quantized channel direction information (CDI) feedback. Our design objective is to maximi...
Analytical and Equivalent Circuit Models to Elucidate Power Balance in Scattering Problems.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Antennas & Propagation. May2013, Vol. 61 Issue 5, p2714-2726. 13p.
Abstract: Analytical and equivalent circuit models are presented to elucidate the balance of powers in scattering processes. Specifically, closed-form expressions of the associated maximal extracted, scattered, absorbed and reactive powers are formulated. The ci...
Segmentation of Choroidal Neovascularization in Fundus Fluorescein Angiograms.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Biomedical Engineering. May2013, Vol. 60 Issue 5, p1439-1445. 7p.
Abstract: Choroidal neovascularization (CNV) is a common manifestation of age-related macular degeneration (AMD). It is characterized by the growth of abnormal blood vessels in the choroidal layer causing blurring and deterioration of the vision. In late stages,...
Distributed Robust Power System State Estimation.
Publication Type: Academic Journal
Source(s): IEEE Transactions on Power Systems. May2013, Vol. 28 Issue 2, p1617-1626. 10p.
Abstract: Deregulation of energy markets, penetration of renewables, advanced metering capabilities, and the urge for situational awareness, all call for system-wide power system state estimation (PSSE). Implementing a centralized estimator though is practically...