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Jun 2, 2010



Year 2007
  • An OFDM-CDMA scheme for High Data Rate UWB applications
  • Time-Domain Signal Detection Based on Second-Order Statistics for MIMO-OFDM Systems.
  • Sequence Synchronization in a wideband CDMA  System
Year 2008
  • A Token-Based Scheduling Scheme for WLANs Supporting Voice/Data Traffic and its Performance Analysis
  • Adaptive Radio Resource Allocation for Downlink OFDMA/SDMA Systems with Multimedia Traffic
  • Coding Schemes Applied to Peak-to-Average Power Ratio (PAPR) Reduction in OFDM Systems
  • Cooperative Sensing for Primary Detection in Cognitive Radio
  • Design and Analysis of Bit Interleaved Coded Space-Time Modulation
  • Enhancing MB-OFDM Throughput with Dual Circular 32-QAM
  • Fast and Efficient QoS-Guaranteed Adaptive Transmission Algorithm in the Mobile WiMAX System
  • Filter Bank Spectrum Sensing for Cognitive Radios
  • Joint Optimum Linear Precoding and Power Control Strategies for Downlink MC-CDMA Systems
  • Efficient Spatial Covariance Estimation for Asynchronous Co-channel Interference Suppression in MIMO-OFDM Systems
  • Power Allocation for Two Different Traffics in Layered MIMO Systems
  • Performance Evaluation of the WiMedia PHY in WPAN Environments and Efficiency Improvement by Application of LDPC Codes
  • Variable Sub-carrier in OFDM to Reduce the ICI Due to Carrier Frequency Offset and IQ Imbalance
Year 2009
  • Ranging With Ultrawide Bandwidth Signals in Multipath Environments
  • Semisoft Handover Gain Analysis Over OFDM-Based Broadband Systems
  • Ultra-Wide-Band Propagation Channels
  • Pulsed-OFDM Modulation for Ultrawideband Communications
  • Grouping Technique for Cooperative Spectrum Sensing in Cognitive Radios
  • Implementation of the least squares channel estimation algorithm for MIMO-OFDM systems
  • Sequential Detection for Multiuser MIMO CDMA Systems with Single Spreading Code Per User
  • A Multicode Approach for High Data Rate UWB System Design
  • Replacement of Spectrum Sensing in Cognitive Radio
  • Variance-Reduced Partial Parallel Interference Cancellation for MC-CDMA Uplink Systems
  • A Closed-Form Blind CFO Estimator Based on Frequency Analysis for OFDM Systems
  • Eigenvalue based Spectrum Sensing Algorithms for Cognitive Radio
  • A New Parameter for UWB Indoor Channel Profile Identification
  • Cognitive Radio Sensing Architecture and A Sensor Selection Case Study
  • Cooperative Spectrum Sensing with Cluster-Based Architecture in Cognitive Radio Networks
  • Efficient Power Allocation for Coded OFDM Systems
  • Measurement Based Channel-Adaptive Video Streaming for Mobile Devices over Mobile WiMAX
  • Sparsity-Embracing Multiuser Detection for CDMA Systems with Low Activity Factor
  • Analysis and Comparison of Clipping Techniques for OFDM Peak-to-Average Power Ratio Reduction
  • Error control coding in wireless sensor networks
Year 2010
  • Bandwidth Exchange: An Energy Conserving Incentive Mechanism for Cooperation
  • Blind Matched Filtering for Multiple Input Multiple Output Transceivers
  • Estimation of Cubic Nonlinear Bandpass Channels in Orthogonal Frequency-Division Multiplexing Systems
  • Error-Resilient H.264/AVC Video Transmission Using Two-Way Decodable Variable Length Data Block
  • Simplified Multiaccess Interference Reduction for MC-CDMA With Carrier Frequency Offsets
  • Optical Communications Performance of Hybrid 34-Meter Microwave Antennas
  • Performance Analysis of Distributed Decision Fusion Using A Censoring Scheme in Wireless Sensor Networks
  • Gradient Descent Bit Flipping Algorithms for Decoding LDPC Codes
  • Efficacy of Multiband OFDM Approach in High Data Rate Ultra WideBand WPAN Physical Layer Standard using Realistic Channel Models
  • Carrier Frequency Offsets Problem in DCT-SC-FDMA System
  • Signal to Interference Ratio Based Handoff Management for Next-Generation Wireless Systems
Year 2011
  • Low complexity PTS algorithm based on gray code and its FPGA implementation
  • Performance Analysis of MIMO-OFDM System Using QOSTBC Code Structure for M-QAM
  • Dynamic Dwell Timer for Hybrid Vertical Handover in 4G Coupled Networks
  • Exploiting Sparse User Activity in Multiuser Detection
  • IIR system identification using cat swarm optimization
  • Peak to Average Power Ratio (PAPR) Reduction in OFDM for a WLAN network Using SLM Technique
  • Suppression of Narrowband Interference in impulse radio based high data rate UWB WPAN communication system using NLOS Channel Model
  • Digital Fractional Order Savitzky-Golay Differentiator
  • A New Algorithm for Power Allocation in  MIMO-OFDM Systems  with a Beam-forming Scheme
  • Poly:A reliable and energy efficient topology control protocol for wireless
  • High user capacity collaborative code-division multiple access
Year 2012
  • Analysis and Design of Coding and Interleaving in a MIMO-OFDM Communication System
  • Optimum Clustered Pilot Sequence for OFDM Systems under Rapidly Time-Varying Channel
  • Performance Evaluation of Complex Wavelet Packet Modulation (CWPM) System over Multipath Rayleigh Fading Channel
  • Two-Way Amplify-and-Forward MIMO Relay Networks with Antenna Selection
  • A Frequency Offset Estimation and Compensation Scheme for  MB-OFDM UWB Modem 
  • Analysis and Design of Coding and Interleavingin a MIMO-OFDM Communication System 
Year 2013
  • Adaptive resource allocation for downlink grouped MC-CDMA systems with power and BER constraints
  • Selfish Attacks and Detection in Cognitive Radio Ad-Hoc Networks
  • An Evolving Graph-Based Reliable Routing Scheme for VANETs
Year 2014
  • Cooperative Spectrum Sharing Between Cellular and Ad-Hoc Networks
  • Spectrum-Sharing Multi-Hop Cooperative Relaying:Performance Analysis Using Extreme Value Theory
  • Optimal power allocation in multi-hop cooperative network using non-regenerative relaying protocol
  • Lifetime maximizing cooperative energy efficient broadcast tree in multi hop wireless networks
  • Spectrum sensing-energy tradeoff in multi-hop cluster based cooperative cognitive radio networks
  • Design and Implementation of Interference-Aware Cooperative QoS Routing for Multi-hop Wireless Network
  • TDMA-Based Cooperative MAC Protocol for Multi-Hop Relaying Networks
  • FBMIS: A Fuzzy-Based Multi-interface System for Cellular and Ad Hoc Networks
  • Multicast Capacity in MANET with Infrastructure Support
  • Resource allocation in multi-hop Mobile Ad hoc cloud
  • A real-time implementation of interference neutralization for multi-source multi-hop wireless networks
  • Real-Time Path Planning Based on Hybrid-VANET-Enhanced Transportation System
  • Proposal of ad-hoc multicasting based on OFDM cooperative communication
  • Spectrum-Map-Empowered Opportunistic Routing for Cognitive Radio Ad Hoc Networks
  • Convergence Analysis and Digital Implementation of a Discrete-Time Neural Network for Model Predictive Control
  • McMAC: A Parallel Rendezvous Multi-Channel MAC Protocol
  • Performance of Coded Multi-Carrier DS-CDMA systems in Multi-path fading channels
  • Support vector machine based multi-view face detection and recognition-2004
  • Fingerprint Feature Extraction Based Discrete Cosine Transformation (DCT)-2006
  • Intensified fuzzy clusters for classifying plant, soil, and residue regions of interest from color images
  • Determination of Minutiae Scores for Fingerprint Image Applications
  • MRI brain image segmentation by multi-resolution edge detection and region selection
  • Recognition of human actions using motion history information extracted from the compressed video
  • Automated Classification of fMRI Data Employing Trial
  • Complex Wavelets and its application to Image Fusion
  • Genetic Algorithms for the Unsupervised Classification of Satellite Images
Year 2007
  • Color Image Segmentation Based on Mean Shift and Normalized Cuts
  • Hierarchical contour matching for dental X-ray radiographs
  • An Improving Model Watermarking with Iris Biometric Code
  • Lossless Video Sequence Compression Using Adaptive Prediction
  • A Leaf Recognition Algorithm for Plant Classification Using Probabilistic Neural Network
Year 2008
  • Active Learning Methods for Interactive Image Retrieval
  • Detecting Dominant Motions in Dense Crowds
  • Personal Authentication Based on Iris Texture Analysis
  • Robust Image Segmentation Algorithm Using Fuzzy Clustering Based on Kernel-Induced Distance Measure
  • Wearable Monitoring of Seated Spinal Posture
  • Design of a Distributed Traffic Monitoring System and Algorithm based on Web-camera
  • VisualRank: Applying PageRank to Large-Scale Image Search
  • Watermarking Relational Databases using Optimization Based Techniques
  • Fingerprint Verification Using SIFT Features
  • A Lossless Compression Scheme for Bayer Color Filter Array Images
  • Motion-Tracking for Hands-Free Mouse-Pointer Manipulation
  • Face Tracking and Recognition with Visual Constraints in Real-World Videos
  • An a contrario approach for outliers segmentation application to multiple sclerosis in MRI
  • An Unsupervised Technique Based on Morphological Filters for Change Detection in Very High Resolution Images
  • A Novel Segmentation Algorithm for Side-scan Sonar Imagery with Multi-Object
Year 2009
  • A Fast Image Compression Algorithm Based on SPIHT
  • Application of Support Vector Machine and Genetic Algorithm for Improved Blood Cell Recognition
  • Reconstruction Of Underwater Image By BISPECTRUM
  • Combined Wavelet-Domain and Motion-Compensated Video Denoising Based on Video Codec Motion Estimation Methods
  • Artificial Neural Network Based Automatic Face Parts Prediction System from Only Fingerprints
  • A Histogram Modification Framework and Its Application for Image Contrast Enhancement
  • New Statistical Detector for DWT-Based Additive Image Watermarking Using the Gauss–Hermite Expansion
  • Fast Query Point Movement Techniques for Large CBIR Systems.
  • A Video Coding Scheme Based on Joint Spatiotemporal and Adaptive Prediction
  • The Global K-Means Algorithm for Clustering in Feature Space
  • Towards Handwritten Mathematical Expression Recognition.
  • Content-Based Classification&Segmentation of Mixed Type Audio by Using MPEG Features
  • ECG Arrhythmia Classification with Support Vector Machines and Genetic Algorithm
Year 2010
  • Face Verification across Age Progression using Discriminative Methods
  • Frequency Compounding for Ultrasound Freehand Elastography
  • Satellite Image Resolution Enhancement Using Complex Wavelet Transform
  • Video sensor network for real-time traffic monitoring and surveillance
  • Error-Resilient H.264/AVC Video Transmission Using Two-Way Decodable Variable Length Data Block
  • IRIS Recognition Using Neural Network
  • A Secure Iris Image Encryption Technique Using Bio-Chaotic Algorithm
  • Relative Radiometric Correction of Cloudy Multitemporal Satellite Imagery
  • Region Duplication Detection Using Image Feature Matching
  • Content Based Image Retrieval using Hierarchical and K-Means Clustering Techniques
  • A rapid 3D seed-filling algorithm based on scan slice
Year 2011
  • A Point Feature-based Cylindrical Image Mosaic Method
  • Image Mosaics Algorithm Based on Feature-Block Matching
  • Modeling and Formalization of Fuzzy Finite Automata for Detection of Irregular Fire Flames
  • Real-time Sign Language Recognition based on Neural Network Architecture
  • Improved Biometric Recognition and Identification of human IRIS patterns using Neural Networks.
  • A robust detection algorithm for copy-move forgery in digital images
  • An Optimal Data Hiding Scheme With Tree-Based Parity Check
  • A Robust and Fast Video Copy Detection System Using Content-Based Fingerprinting
  • Matching Forensic Sketches to Mug Shot Photos
  • Automated classification of discrete human thoughts using functional magnetic resonance imaging (fMRI)
  • Automatic Road Detection Using MCSC
  • Dental biometrics Human identification based on teeth
  • Detection of Parked Vehicles Using Spatiotemporal maps
Year 2012
  • Artifacts Removal and Edge Detection of Digitally Compressed Images
  • Gender Recognition from Face Images with Local WLD Descriptor
  • Drowsiness Detection based on Eye Movement, Yawn Detection and Head Rotation
  • Index Codes for Multibiometric Pattern Retrival
  • A Bayesian Technique for Image Classifying Registration
  • A Joint Encryption Watermarking System for erifying the Reliability of Medical Images
  • Framelet-Based Blind Motion Deblurring From a Single Image
  • Image Segmentation using Fuzzy Rule Based
  • Index Codes for Multibiometric Pattern Retrieval
  • In-painting approach to repair cracked images
  • Multistage Image Clustering and Segmentation with Normalised Cuts
Year 2013
  • Image steganography in DWT domain using double-stegging with RSA encryption
  • Spine Image Fusion via Graph Cuts
  • Heterogeneous Face Recognition Using Kernel Prototype Similarities
  • 3D Face Recognition under Expressions,Occlusions, and Pose Variations
  • A Secure Image Steganography Based on RSA Algorithm and Hash-LSB Technique
  • Detection and Removal of Cracks in Digitized Paintings
  • Emotion recognition from geometric facial features using self-organizing map
  • Image Adaptive Enhancement Strategy Based on Neural Network
  • Cellular Automata for unsupervised remotely sensed data classification 
  • Computerized Detection of Lung Nodules by Meansof “Virtual Dual-Energy” Radiography 
  • Separable Reversible Data Hiding Using Rc4 Algorithm
  • Superpixel Classification Based Optic Disc and Optic Cup Segmentation for Glaucoma Screening
  • Video Object Tracking in the Compressed Domain Using Spatio-Temporal Markov Random Fields
  • Wavelet-Based ECG Steganography for Protecting Patient Confidential Information in Point-of-Care Systems
Year 2014
  • A Novel Joint Data-Hiding and Compression Scheme Based on SMVQ and Image Inpainting
  • Color Video Denoising Based on Combined Interframe and Intercolor Prediction
  • LBP-Based Edge-Texture Features for Object Recognition
  • Moving object recognition under simulated prosthetic vision using background-subtraction-based image processing strategies
  • Robust Biometrics-Based Authentication Scheme for Multiserver Environment
  • SAR Image Denoising via Clustering-Based Principal Component Analysis
  • 3D Assisted Face Recognition: Dealing With Expression Variations
  • A Pan-Sharpening Based on the Non-Subsampled Contourlet Transform: Application to Worldview-2 Imagery
  • Effective Contrast-Based Dehazing for Robust Image Matching
  • Lossless to Lossy Dual-Tree BEZW Compression for Hyperspectral Images
  • Reversible Data Hiding in Encrypted JPEG Bitstream 
  • Image Quality Assessment for Fake Biometric Detection: Application to Iris, Fingerprint, and Face Recognition
  • Digital Image Chaotic Encryption
  • An Efficient Prediction Based Lossless Compression Scheme for Bayer CFA Images
  • Localization of License Plate Number Using Dynamic Image Processing Techniques and Genetic Algorithms
  • A New Secure Image Transmission Technique via Secret-Fragment-Visible Mosaic Images by Nearly Reversible Color Transformations
  • Data Hiding in Encrypted H.264/AVC Video Streams by Codeword Substitution 
  • Detection of Lung Cancer using Sputum Image Segmentation 
  • An ultrasound image enhancement method using local gradient based fuzzy similarity
  • Content Based Image Retrieval Using Interactive Genetic Algorithm 
  • Satellite Image Fusion using Fast Discrete Curvelet Transforms
  • Speech Emotion Recognition Based on HMM AND SVM-2005
  • Improving the intelligibility of dysarthric speech-2007
  • Content-Based Music Information Retrieval: Current Directions and Future Challenges-2008
  • An Overview of Text-Independent Speaker Recognition: from Features to Supervectors-2009
  • ECG Arrhythmia Classification with Support Vector Machines and Genetic Algorithm-2009
  • Epileptic Seizure Detection in EEGs Using Time–Frequency Analysis-2009
  • Speech Enhancement Using Harmonic Emphasis and Adaptive Comb Filtering-2010
  • Implementing a Speech Recognition System Interface for Indian Languages-2010
  • Calibration of Confidence Measures in Speech Recognition-2011
  • Broad Acoustic Classification of Spoken Hindi Hybrid Paired Words using Artificial Neural Networks-2012
  • Design and Development of a Malayalam to English Translator-2012
  • Speech and Speaker Recognition System using Artificial Neural Networks and Hidden Markov Model-2012
  • Multiclass epileptic seizure classification using time- frequency analysis of EEG signals-2012 
  • Audio Watermarking Via EMD-2013
  • Audio Steganography using RSA Algorithm and Genetic based Substitution method to Enhance Security-2014
  • GA-based Approach with Reduced RSA Encryption Security for Audio Steganography-2014
  • DUCHA: A New Dual-channel MAC Protocol for Multihop Ad Hoc Networks-2006
  • Adaptive Routing in Dynamic Ad Hoc Networks-2008
  • Cooperative MIMO-Beamforming For Multiuser Relay Networks-2009
  • A Medium Access Control Scheme for TDD-CDMA Cellular Networks with Two-Hop Relay Architecture-2009
  • Single-Link Failure Detection in All-Optical Networks Using Monitoring Cycles and Paths-2009
  • A Matrix-Based Pairwise Key Establishment Scheme for Wireless Mesh Networks Using Pre Deployment Knowledge-2013 
  • A Clustering Routing Protocol for Energy Balance of Wireless Sensor Network based on Simulated Annealing and Genetic Algorithm-2014

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Apr 26, 2010


Abstract- Many multiple channel MAC protocols for wireless networks have been proposed to make efficient use of multiple channels where each node has a single radio which allows it to send or receive on one channel at a time. However, most of the proposed protocols are single rendezvous protocols that are subject to the congestion of the control channel. We propose a new parallel rendezvous protocol, McMAC, to avoid control channel congestion so that it can scale to use a large number of channels efficiently. We validate our protocol design using simulation and implementation. 

Many multi-channel wireless MAC protocols have been proposed to increase the throughput of ad hoc networks. These protocols exploit the availability of multiple disjoint channels (i.e., frequency bands) and the ability of modern radios to switch channels quickly. Using a multi-channel MAC protocol, different devices can transmit in parallel on distinct channels. The parallelism increases throughput and can potentially reduce delay as well, provided channel access time is not excessive.

Protocols differ in how devices negotiate the channel to use and resolve medium contention. Dedicated Control Channel approach designate one channel exclusively for control purposes. Each node listens to that channel to make an agreement. A separate transceiver is used for data transmission. Unlike the Dedicated Control Channel, other approaches typically use only one radio for both control and data packets. For example, for Split-phase protocols, time is split into alternating periods of control and data phases. In a control phase, all devices listen to the control channel to make an  agreement. In the data phase, nodes change to their respective channels negotiated in the previous control phase to exchange data in parallel. In Common-hopping approach, all idle devices hop together over every channel sequentially. They make an agreement as they hop together and pauses only if they have data to exchange. Even though Dedicated Control Channel, Split-phase, and Common Hopping differ in the way nodes make channel agreements, they are all categorized as single rendezvous protocols because at any instance, the rendezvous between a sender and its receiver can happen on at most one channel. 



Abstract—In coded OFDM systems, the transmission power of each subchannel is the same. In this letter, a power optimization scheme is presented to minimize FER or BER of a coded OFDM system under constant transmission power constraint. The power optimization is shown to be a convex optimization problem. 

CODED OFDM systems offer robust communication links with the frequency diversity that results from channel coding and interleaving. However, the power allocated to the nulls of the frequency response is likely to be wasted. If there is a feedback link from the receiver to the transmitter, the transmitter can change the power level of each subchannel keeping the total transmission power constant. Therefore, with efficient power allocation, the performance of coded OFDM systems can be improved. Subchannel power allocation schemes have been proposed for uncoded and coded OFDM systems. However, previous papers have not fully investigated the power allocation for error rate minimization considering the interaction of channel coding, interleaving and channel response. 

In this, the upper bounds on bit error rate (BER) and frame error rate (FER) are derived for a coded OFDM system with given interleaver, channel coding and modulation schemes. The bounds can be expressed as sums of exponential functions or sums of Q-functions that are convex functions. Therefore, the power allocation to minimize the target BER or FER under the total transmission power constraint is shown to be a convex optimization problem. By solving the power optimization problem, the performance of coded OFDM systems can be improved compared with the conventional constant power allocation.