Articles
Page 50 of 72
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Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:810149
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Channel MAC Protocol for Opportunistic Communication in Ad Hoc Wireless Networks
Despite significant research effort, the performance of distributed medium access control methods has failed to meet theoretical expectations. This paper proposes a protocol named "Channel MAC" performing a fu...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:368209 -
Throughput-Optimal Scheduling with Low Average Delay for Cellular Broadcast Systems
While a number of scheduling policies achieve the maximum throughput region, the average delay minimization problem for cellular broadcast systems still awaits its complete solution. To this end, we introduce ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:762050 -
A Coordinated Resource Allocation Algorithm for Infrastructure-Based Relay Networks
A resource allocation algorithm for orthogonal frequency division multiple access-based and infrastructure-based relay networks is introduced in this paper. The algorithm is applied in the downlink of a single...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:630964 -
Motion Entropy Feature and Its Applications to Event-Based Segmentation of Sports Video
An entropy-based criterion is proposed to characterize the pattern and intensity of object motion in a video sequence as a function of time. By applying a homoscedastic error model-based time series change poi...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:460913 -
Enhancing the Performance of Random Access Networks with Random Packet CDMA and Joint Detection
Random packet CDMA (RP-CDMA) is a recently proposed random transmission scheme which has been designed from the beginning as a cross-layer method to overcome the restrictive nature of the Aloha protocol. Herei...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:238103 -
Cross Layer PHY-MAC Protocol for Wireless Static and Mobile Ad Hoc Networks
Multihop mobile wireless networks have drawn a lot of attention in recent years thanks to their wide applicability in civil and military environments. Since the existing IEEE 802.11 distributed coordination fu...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:278041 -
Medium Access in Spread-Spectrum Ad Hoc Networks with Multiuser Detection
Conventional medium access control protocols are designed to avoid simultaneous transmissions, based on a simple collision model in the underlying physical layer. Recently, strong physical layer capabilities, ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:156247 -
Practical Radio Link Resource Allocation for Fair QoS-Provision on OFDMA Downlink with Partial Channel-State Information
We address the problem of resource allocation on the downlink of an OFDMA single-cell system under fairness constraints with limited channel state information (CSI). Target QoS corresponds to a minimum user da...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:602856 -
Detection and Correction of Under-/Overexposed Optical Soundtracks by Coupling Image and Audio Signal Processing
Film restoration using image processing, has been an active research field during the last years. However, the restoration of the soundtrack has been mainly performed in the sound domain, using signal processi...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:281486 -
Further Development of Synchronous Array Method for Ad Hoc Wireless Networks
A further development of the synchronous array method (SAM) as a medium access control scheme for large-scale ad hoc wireless networks is presented. Under SAM, all transmissions of data packets between adjacen...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:873202 -
Emerging Machine Learning Techniques in Signal Processing
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:830381 -
Optimal Signal Reconstruction Using the Empirical Mode Decomposition
The empirical mode decomposition (EMD) was recently proposed as a new time-frequency analysis tool for nonstationary and nonlinear signals. Although the EMD is able to find the intrinsic modes of a signal and ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:845294 -
Using Intracardiac Vectorcardiographic Loop for Surface ECG Synthesis
Current cardiac implantable devices offer improved processing power and recording capabilities. Some of these devices already provide basic telemonitoring features that may help to reduce health care expenditu...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:410630 -
Removal of Color Scratches from Old Motion Picture Films Exploiting Human Perception
In this paper a unified model for both detection and restoration of line scratches on color movies is presented. It exploits a generalization of the light diffraction effect for modeling the shape of scratches...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:352986 -
Decoupled Estimation of 2D DOA for Coherently Distributed Sources Using 3D Matrix Pencil Method
A new 2D DOA estimation method for coherently distributed (CD) source is proposed. CD sources model is constructed by using Taylor approximation to the generalized steering vector (GSV), whereas the angular an...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:417157 -
The LOST Algorithm: Finding Lines and Separating Speech Mixtures
Robust clustering of data into linear subspaces is a frequently encountered problem. Here, we treat clustering of one-dimensional subspaces that cross the origin. This problem arises in blind source separation...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:784296 -
Online Estimation of Time-Varying Volatility Using a Continuous-Discrete LMS Algorithm
The following paper addresses a problem of inference in financial engineering, namely, online time-varying volatility estimation. The proposed method is based on an adaptive predictor for the stock price, buil...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:532760 -
Adaptive Reference Levels in a Level-Crossing Analog-to-Digital Converter
Level-crossing analog-to-digital converters (LC ADCs) have been considered in the literature and have been shown to efficiently sample certain classes of signals. One important aspect of their implementation i...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:513706 -
A Minimax Mutual Information Scheme for Supervised Feature Extraction and Its Application to EEG-Based Brain-Computer Interfacing
This paper presents a novel approach for efficient feature extraction using mutual information (MI). In terms of mutual information, the optimal feature extraction is creating a feature set from the data which...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:673040 -
The Likelihood Ratio Decision Criterion for Nuisance Attribute Projection in GMM Speaker Verification
We propose a way of integrating likelihood ratio (LR) decision criterion with nuisance attribute projection (NAP) for Gaussian mixture model- (GMM-) based speaker verification. The experiments on the core test...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:786431 -
Microarchitecture of a MultiCore SoC for Data Analysis of a Lab-on-Chip Microarray
This paper presents a reconfigurable architecture of a lab-on-chip (LoC) microarray device capable to process data either in genotyping or in gene expression applications in a fraction of the time that is requ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:520641 -
Robust Linear MIMO in the Downlink: A Worst-Case Optimization with Ellipsoidal Uncertainty Regions
This paper addresses the joint robust power control and beamforming design of a linear multiuser multiple-input multiple-output (MIMO) antenna system in the downlink where users are subjected to individual sig...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:609028 -
Reiterative Robust Adaptive Thresholding for Nonhomogeneity Detection in Non-Gaussian Noise
A robust and data-dependent adaptive thresholding algorithm for nonhomogeneity detection in non-Gaussian interference is addressed. The algorithm is to be used as a preprocessing technique to select a set of h...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:786136 -
On the Problem of Bandwidth Partitioning in FDD Block-Fading Single-User MISO/SIMO Systems
We report on our research activity on the problem of how to optimally partition the available bandwidth of frequency division duplex, multi-input single-output communication systems, into subbands for the upli...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:735929 -
Implementation of the Least-Squares Lattice with Order and Forgetting Factor Estimation for FPGA
A high performance RLS lattice filter with the estimation of an unknown order and forgetting factor of identified system was developed and implemented as a PCORE coprocessor for Xilinx EDK. The coprocessor imp...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:394201 -
Introduction to the Special Issue on Wireless Video
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:749159 -
Improving 2D-Log-Number-System Representations by Use of an Optimal Base
The 2-dimensional logarithmic number system (2DLNS), a subset of the multi-DLNS (MDLNS), which has similar properties to the classical Logarithmic Number System (LNS), provides more degrees of freedom than the...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:710590 -
A Reconfigurable GNSS Acquisition Scheme for Time-Frequency Applications
The extreme weakness of global navigation satellite system (GNSS) signals makes them vulnerable to almost every kind of interferences that, without adequate countermeasures, can heavily compromise the receiver...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:356267 -
Flicker Compensation for Archived Film Sequences Using a Segmentation-Based Nonlinear Model
A new approach for the compensation of temporal brightness variations (commonly referred to as flicker) in archived film sequences is presented. The proposed method uses fundamental principles of photographic ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:347495 -
Dynamic Resolution in GPU-Accelerated Volume Rendering to Autostereoscopic Multiview Lenticular Displays
The generation of multiview stereoscopic images of large volume rendered data demands an enormous amount of calculations. We propose a method for hardware accelerated volume rendering of medical data sets to m...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:843753 -
Nonconcave Utility Maximisation in the MIMO Broadcast Channel
The problem of determining an optimal parameter setup at the physical layer in a multiuser, multiantenna downlink is considered. An aggregate utility, which is assumed to depend on the users' rates, is used as...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:645041 -
Object Delineation by
-Connected Components
The notion of "strength of connectedness" between pixels has been successfully used in image segmentation. We present extensions to these works, which can considerably improve the efficiency of object delineat...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:467928 -
Network Anomaly Detection Based on Wavelet Analysis
Signal processing techniques have been applied recently for analyzing and detecting network anomalies due to their potential to find novel or unknown intrusions. In this paper, we propose a new network signal ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:837601 -
Objectives for New Error Criteria for Mobile Broadcasting of Streaming Audiovisual Services
This paper demonstrates the need of and objectives for new error criteria for mobile broadcasting and the problems related to defining numerical error criteria for video services. The current error criterion u...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:518219 -
Motion Vector Sharing and Bitrate Allocation for 3D Video-Plus-Depth Coding
The video-plus-depth data representation uses a regular texture video enriched with the so-called depth map, providing the depth distance for each pixel. The compression efficiency is usually higher for smooth...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:258920 -
A Flexible Client-Driven 3DTV System for Real-Time Acquisition, Transmission, and Display of Dynamic Scenes
3D experience and free-viewpoint navigation are expected to be two essential features of next generation television. In this paper, we present a flexible 3DTV system in which multiview video streams are captur...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2009:351452 -
Digital Communication Receivers Using Gaussian Processes for Machine Learning
We propose Gaussian processes (GPs) as a novel nonlinear receiver for digital communication systems. The GPs framework can be used to solve both classification (GPC) and regression (GPR) problems. The minimum ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:491503 -
Adaptive Delta-Sigma Modulation for Enhanced Input Dynamic Range
An adaptive delta-sigma modulator of 1st order with one-bit quantization is presented. Adaptation is instantaneous and based on an exponential law. The feedback signal is a multibit discrete-level signal gener...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:439203 -
Machine Learning in Image Processing
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:927950 -
A Cross-Layer Approach for Maximizing Visual Entropy Using Closed-Loop Downlink MIMO
We propose an adaptive video transmission scheme to achieve unequal error protection in a closed loop multiple input multiple output (MIMO) system for wavelet-based video coding. In this scheme, visual entropy...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:864606 -
Protection of Video Packets over a Wireless Rayleigh Fading Link: FEC versus ARQ
Video content can be provided to an end user by transmitting video data as a sequence of internet protocol (IP) packets over the network. When the network contains a wireless link, packet erasures occur becaus...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:852697 -
Multiradio Resource Management: Parallel Transmission for Higher Throughput?
Mobile communication systems beyond the third generation will see the interconnection of heterogeneous radio access networks (UMTS, WiMax, wireless local area networks, etc.) in order to always provide the bes...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:763264 -
About Noneigenvector Source Localization Methods
Previous studies dedicated to source localization are based on the spectral matrix algebraic properties. In particular, two noneigenvector methods, namely, propagator and Ermolaev and Gershman (EG) algorithms,...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:480835 -
Power and Resource Allocation for Orthogonal Multiple Access Relay Systems
We study the problem of joint power and channel resource allocation for orthogonal multiple access relay (MAR) systems in order to maximize the achievable rate region. Four relaying strategies are considered; ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:476125 -
An Adaptive Fair-Distributed Scheduling Algorithm to Guarantee QoS for Both VBR and CBR Video Traffics on IEEE 802.11e WLANs
Most of the centralized QoS mechanisms for WLAN MAC layer are only able to guarantee QoS parameters for CBR video traffic effectively. On the other hand, the existing distributed QoS mechanisms are only able t...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:264790 -
Power-Constrained Fuzzy Logic Control of Video Streaming over a Wireless Interconnect
Wireless communication of video, with Bluetooth as an example, represents a compromise between channel conditions, display and decode deadlines, and energy constraints. This paper proposes fuzzy logic control ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:560749 -
Segmentation of Killer Whale Vocalizations Using the Hilbert-Huang Transform
The study of cetacean vocalizations is usually based on spectrogram analysis. The feature extraction is obtained from 2D methods like the edge detection algorithm. Difficulties appear when signal-to-noise ratios ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:245936 -
Note Onset Detection via Nonnegative Factorization of Magnitude Spectrum
A novel approach for onset detection of musical notes from audio signals is presented. In contrast to most commonly used conventional approaches, the proposed method features new detection functions constructe...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:231367 -
Optimal JPWL Forward Error Correction Rate Allocation for Robust JPEG 2000 Images and Video Streaming over Mobile Ad Hoc Networks
Based on the analysis of real mobile ad hoc network (MANET) traces, we derive in this paper an optimal wireless JPEG 2000 compliant forward error correction (FEC) rate allocation scheme for a robust streaming ...
Citation: EURASIP Journal on Advances in Signal Processing 2008 2008:192984
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