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Mitsubishi Electric Research Laboratories
(95 results)-
White Papers
Adaptive Antenna Selection at Mobile Stations for SDMA in WiMAX Networks
September 1, 2009, 12:00am PDT
The IEEE 802.16/WiMAX standards has fully embraced multi-antenna technology and can, thus, deliver robust performance and high transmission rates. Nevertheless, due to its inherent cost concerns,...
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White Papers
Frame Structure Design for IEEE 802.16j Mobile Multihop Relay (MMR) Networks
September 1, 2008, 12:00am PDT
Frame structure is critical to an IEEE 802.16e OFDMA network, as it governs the fundamental channel access in both time and frequency domain. The framework structure design is tremendously...
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White Papers
Relay-Coded Multi-User Cooperative Communications for Uplink LTE-Advanced 4G Systems
December 1, 2009, 12:00am PST
A technical consensus for future LTE-advanced 4G systems is the adoption of Relay Stations (RS) for letter link performance. While study in relay systems is often carried out for individual users...
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White Papers
A WiFi Measurement in 802.11g Networks
February 10, 2010, 12:00am PST
The hidden terminal problem is closely related to the Transmission Range (TX Range), Carrier Sensing Range (CS Range) and InterFerence Range (IF Range) of stations in wireless local area networks...
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White Papers
Fully Secure Functional Encryption With General Relations From the Decisional Linear Assumption
November 5, 2010, 12:00am PDT
This paper presents a fully secure functional encryption scheme for a wide class of relations, that are specified by non-monotone access structures combined with inner-product relations. The...
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White Papers
Privacy Preserving Probabilistic Inference With Hidden Markov Models
May 1, 2011, 12:00am PDT
Alice possesses a sample of private data from which she wishes to obtain some probabilistic inference. Bob possesses Hidden Markov Models (HMMs) for this purpose, but a person wants the model...
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White Papers
Capacity, MSE and Secrecy Analysis of Linear Block Precoding for Distributed Antenna Systems in Multi-User Frequency-Selective Fading Channels
March 1, 2011, 12:00am PST
Block transmission with cyclic prefix is a promising technique to realize high-speed data rates in frequency-selective fading channels. Many popular linear precoding schemes, including Orthogonal...
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White Papers
Achieving Near-Exponential Diversity on Uncoded Low-Dimensional MIMO, Multi-User and Multi-Carrie Systems Without Transmitter CSI
April 1, 2011, 12:00am PDT
It is well-known that for Single-Input and Single-Output (SISO) narrow-band transmission on frequency-flat fading channels, uncoded communication with only Receiver Channel State Information...
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White Papers
An Information-Theoretic Analysis of Revocability and Reusability in Secure Biometrics
February 1, 2011, 12:00am PST
Secure biometric systems are designed to allow authentication without requiring a reference biometric sample to be stored in the clear at the access control device. Instead, a template extracted...
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White Papers
Performance Analysis of Joint Opportunistic Scheduling and Receiver Design for MIMO-SDMA Downlink
January 1, 2011, 12:00am PST
In this paper, the sum-rate performance of Joint Opportunistic Scheduling and Receiver Design (JOSRD) is analyzed for multiuser Multiple-Input-Multiple Output (MIMO) Space-Division Multiple Access...
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White Papers
Location Aware Fast Handover Between WiMax and WiFi Networks
December 1, 2010, 12:00am PST
Next generation mobile communications will rely on integrated networks consisting of multiple wireless access technologies such as WiFi, WiMAX, GSM and UMTS. With variety of access technologies,...
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White Papers
Safety Message Transmission in Vehicular Communication Networks
December 1, 2010, 12:00am PST
Emerging vehicular safety applications require low latency communications and reliable packet dissemination for life saving safety messages. Significant developments have taken place over the past...
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White Papers
Effect of Transmission Parameters on Efficiency and Reliability of V2V Networks
December 1, 2010, 12:00am PST
Vehicle-to-vehicle communications is essential to create cooperative awareness amongst vehicles, improve roadway safety and roadway capacity, and reduce green house gas emissions. As vehicle...
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White Papers
Fundamental Limits and Improved Algorithms for Linea Least-Squares Wireless Position Estimation
September 1, 2010, 12:00am PDT
In this paper, theoretical lower bounds on performance of Linear Least-Squares (LLS) position estimators are obtained, and performance differences between LLS and Nonlinear Least-Squares (NLS)...
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White Papers
Off-Grid Portable EV Charging Network Management With Dynamic Energy Pricing
November 1, 2010, 12:00am PDT
With emerging of Electric Vehicles (EV), Portable Charging Stations (PCSs) will play a key role to manage EV charging operations off-grid. Otherwise, charging hundreds of EVs at random locations...
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White Papers
Joint Carrier Frequency Offset and Channel Estimation for Uplink MIMO-OFDMA Systems Using Parallel Schmidt Rao-Blackwellized Particle Filters
November 1, 2010, 12:00am PDT
Joint Carrier Frequency Offset (CFO) and channel estimation for uplink MIMO-OFDMA systems over time-varying channels is investigated. To cope with the prohibitive computational complexity involved...
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White Papers
Electric Vehicles Network With Nomadic Portable Charging Stations
September 1, 2010, 12:00am PDT
A novel concept of portable charging station networks to serve Electric Vehicles is described. An optimum charging station deployment method is explained, and its performance has been simulated...
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White Papers
P2Pi: A Minimal Solution for Registration of 3D Points to 3D Planes
November 1, 2010, 12:00am PDT
This paper presents a class of minimal solutions for the 3D-to-3D registration problem in which the sensor data are 3D points and the corresponding object data are 3D planes. In order to compare...
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White Papers
Wireless Power Transmission Efficiency Enhancement With Metamaterials
September 1, 2010, 12:00am PDT
In this paper, a wireless power transfer system with magnetically coupled resonators is studied. The idea to use metamaterials to enhance the coupling coefficient and the transfer efficiency is...
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White Papers
The Relay Selection and Transmission Trade-Off in Cooperative Communication Systems
August 1, 2010, 12:00am PDT
A common and practical paradigm in cooperative communication systems is the use of a dynamically selected best relay to decode and forward information from a source to a destination. Such systems...
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White Papers
A Modified Beacon-Enabled IEEE 802.15.4 MAC Emergency Response Applications
July 1, 2010, 12:00am PDT
IEEE 802.15.4 specification for MAC and PHY offers a standard for general purpose wireless sensor networks. The TG4e of IEEE 802.15 is currently engaged in defining a specification particularly...
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White Papers
A Synchronization Design for UWB-Based Wireless Multimedia Systems
June 1, 2010, 12:00am PDT
Multi-Band Orthogonal Frequency-Division Multiplexing (MB-OFDM) Ultra-WideBand (UWB) technology offers large throughput, low latency and has been adopted in wireless Audio/Video (AV) network...
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White Papers
Breaking the Interactive Bottleneck in Multi-Class Classification With Active Selection and Binary Feedback
July 1, 2010, 12:00am PDT
Multi-class classification schemes typically require human input in the form of precise category names or numbers for each example to be annotated - providing this can be impractical for the user...
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White Papers
Morphable Reflectance Fields for Enhancing Face Recognition
July 1, 2010, 12:00am PDT
In this paper, the authors present a novel framework to address the confounding effects of illumination variation in face recognition. By augmenting the gallery set with realistically relit...
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White Papers
RelCom: Relational Combinatorics Features for Rapid Object Detection
July 1, 2010, 12:00am PDT
The authors present a simple yet elegant feature, RelCom, and a boosted selection method to achieve a very low complexity object detector. They generate combinations of low-level feature...
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White Papers
Clustering Based Fractional Frequency Reuse and Fair Resource Allocation in Multi-Cell Networks
July 1, 2010, 12:00am PDT
Fractional Frequency Reuse (FFR), using different frequency reuse factors for cell center and edge regions, is able to effectively improve spectrum efficiency in multi-cell OFDMA networks....
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White Papers
Subcarrier Spreading for ICI Mitigation in OFDM/OFDMA Systems
July 1, 2010, 12:00am PDT
Two of the major challenges facing OFDM/OFDMA systems are their sensitivity to frequency selective fading and ICI due to CFO or Doppler shift, especially when the subcarrier spacing becomes...
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White Papers
Adaptive Probabilistic Decision-Based Energy Saving Strategy for the Next Generation Cellular Wireless Systems
July 1, 2010, 12:00am PDT
As Mobile Stations (MSs) in the next generation cellular wireless systems will more frequently operate on multiple applications, such as web browsing, VoIP, online video etc., energy saving...
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White Papers
A Complete Characterization of an Optimal Timer Based Scheme
July 1, 2010, 12:00am PDT
Timer-based mechanisms are often used in several wireless systems to help a given (sink) node select the best helper node among many available nodes. Specifically, a node transmits a packet when...
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White Papers
RPL Based Routing for Advanced Metering Infrastructure in Smart Grid
July 1, 2010, 12:00am PDT
In this paper, the authors present a routing protocol design and implementation for the Advanced Metering Infrastructure (AMI) in Smart Grid. The proposed protocol implementation is based on the...
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White Papers
Multi-Class Batch-Mode Active Learning for Image Classification
July 1, 2010, 12:00am PDT
Accurate image classification is crucial in many robotics and surveillance applications - for example, a vision system on a robot needs to accurately recognize the objects seen by its camera....
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White Papers
Multi-Antenna Analog Network Coding for Multi-Hop Wireless Networks
June 1, 2010, 12:00am PDT
This paper proposes a Minimum Mean-Square-Error Bi-directional Amplify-and-Forward (MMSEBAF) relaying protocol for multi-hop wireless networks employing multi-antenna relays. MMSEBAF is a...
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White Papers
Differentiable Spectrum Partition for Fractional Frequency Reuse in Multi-Cell OFDMA Networks
June 1, 2010, 12:00am PDT
To mitigate Inter-Cell Interference (ICI) and achieve higher spectrum efficiency, Fractional Frequency Reuse (FFR) has been widely adopted by the next generation wireless systems, wherein...
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White Papers
QoS Harmonization for Home Networks
April 1, 2010, 12:00am PDT
A modern home could contain a large variety of devices and all of them should be able to work together so as to bring a rich experience to the users. Quality of Service (QoS) is a critical factor...
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White Papers
Privacy and Security of Features Extracted From Minutiae Aggregates
March 1, 2010, 12:00am PST
This paper describes the authors' recent analysis on the security and privacy of biometric feature vectors obtained from fingerprint minutiae. A large number of contiguous regions (cuboids) are...
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White Papers
Hiding Information Inside Structured Shapes
March 1, 2010, 12:00am PST
This paper describes a new technique for embedding a message within structured shapes. It is desired that one changes in the shape owing to the embedded message are invisible to a casual observer...
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White Papers
Optimized Opportunistic Multicast Scheduling (OMS) Over Wireless Cellular Networks
March 1, 2010, 12:00am PST
Optimized Opportunistic Multicast Scheduling (OMS) is studied for cellular networks, where the problem of efficiently transmitting a common set of fountain-encoded data from a single base station...
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White Papers
QRD-Based Precoded MIMO-OFDM Systems With Reduced Feedback
March 1, 2010, 12:00am PST
QR Decomposition (QRD)-based precoded MIMO-OFDM systems with reduced feedback are proposed to convert the MIMO-OFDM channel into layered subchannels. QRD-M is further combined with either Singular...
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White Papers
Alignment and Bit Extraction for Secure Fingerprint Biometrics
February 1, 2010, 12:00am PST
Security of biometric templates stored in a system is important because a stolen template can compromise system security as well as user privacy. Therefore, a number of secure biometrics schemes...
Provided by Mitsubishi Electric Research Laboratories
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White Papers
TV Architecture Supporting Multiple 3D Services
March 1, 2010, 12:00am PST
This paper describes changes to the television architecture to support 3D video, with emphasis on the receiver and display processor. It is expected that multiple 3D services will be available in...
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White Papers
Energy-Efficient Decentralized Routing With Localized Cooperation Suitable for Fast Fading
September 28, 2007, 12:00am PDT
The authors consider the joint optimization of the route and the physical layer in cooperative wireless networks with fast fading. In fast fading channels where the channel states change from one...
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White Papers
On the Indifferentiable Hash Functions in the Multi-Stage Security Games
February 8, 2012, 12:00am PST
It had been widely believed that the indifferentiability framework ensures composition in any security game. However, Ristenpart, Shacham, and Shrimpton (EUROCRYPT 2011) demonstrated that for some...
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White Papers
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption
January 27, 2012, 12:00am PST
In this paper, the authors present two Non-zero Inner-Product Encryption (NIPE) schemes that are adaptively secure under a standard assumption, the Decisional LINear (DLIN) assumption, in the...
Provided by Mitsubishi Electric
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White Papers
Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model
December 22, 2011, 12:00am PST
This paper presents a fully secure (adaptive-predicate unforgeable and private) Attribute-Based Signature (ABS) scheme in the standard model. The security of the proposed ABS scheme is proven...
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White Papers
Decentralized Attribute-Based Signatures
December 22, 2011, 12:00am PST
In this paper, the authors present the first Decentralized Multi-Authority Attribute-Based Signature (DMA-ABS) scheme, in which no central authority and no trusted setup are required. The proposed...
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White Papers
Reduced-Rate OFDM Transmission With Statistics-Based ICI Mitigation
June 1, 2011, 12:00am PDT
In this paper, the authors develop a general reduced-rate Orthogonal Frequency Division Multiplexing (OFDM) transmission scheme for Inter-sub-Channel Interference (ICI) mitigation in a...
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White Papers
Pilot Matrix Design for Estimating Cascaded Channels in Two-Hop MIMO Amplify-and-Forward Relay Systems
June 1, 2011, 12:00am PDT
In this paper, the authors consider a two-hop Multi-Input-Multi-Output (MIMO) Amplify-and-Forward (AF) relay system consisting of a Source Node (SN), a Destination Node (DN), and a Relay Node (RN)...
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White Papers
Resource Block Embedding: Towards High Throughput Broadband Multimedia Wireless Networks
June 1, 2011, 12:00am PDT
For Orthogonal Frequency-Division Multiplexing (OFDM) based wireless systems, a Resource Block (RB) in a two-dimensional time-frequency plane is defined as a data block spanned by a number of...
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White Papers
Experiments on Wireless Power Transfer With Metamaterials
June 1, 2011, 12:00am PDT
In this paper, the authors propose the use of metamaterials to enhance the evanescent wave coupling and improve the transfer efficiency of a wireless power transfer system based on coupled...
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White Papers
Secret Key Sharing and Rateless Coding for Practical Secure Wireless Transmission
August 1, 2011, 12:00am PDT
The authors discuss a secure wireless communication scheme, focusing on designing two major components: the key generation and the coding scheme. To achieve high key matching rate, they propose a...
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White Papers
Ambient Intelligence as the Bridge to the Future of Pervasive Computing
December 1, 2008, 12:00am PST
One prediction about this future of pervasive technology is that people will carry the tools needed to interface with technological resources sprinkled throughout the environment. A problem with...
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White Papers
A Cluster-Based Analysis of Outdoor-to-Indoor Office MIMO Measurements at 5.2 GHz
September 1, 2007, 12:00am PDT
In this paper, the authors present a cluster based analysis of an outdoor-to-indoor Multiple-Input Multiple-Output (MIMO) measurement campaign, and extract model parameters for the COST273 channel...
Provided by Mitsubishi Electric
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White Papers
Achieving Real-Time Object Detection and Tracking Under Extreme Conditions
December 4, 2008, 12:00am PST
Object tracking is one the most important tasks in computer vision. In video surveillance, it is used to understand movement patterns of people to uncover suspicious events. It is a key component...
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White Papers
The Light-Path Less Traveled
April 5, 2011, 12:00am PDT
This paper extends classical object pose and relative camera motion estimation algorithms for imaging sensors sampling the scene through light-paths. Many algorithms in multi-view geometry assume...
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White Papers
Impact of Mobility on the Behavior of Interference in Cellular Wireless Networks
December 1, 2008, 12:00am PST
In this paper, the impact of mobility is investigated in low-speed environments such as femtocells and picocells for wireless networks. Given that there is interference on the uplink of a FDD...
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White Papers
Modified Beacon-Enabled IEEE 802.15.4 MAC for Lower Latency
December 1, 2008, 12:00am PST
Industrial sensing, monitoring and automation offer a lucrative application domain for networking and communications. Wired sensor networks have traditionally been used for these applications...
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White Papers
Shield Fields: Modeling and Capturing 3D Occluders
December 1, 2008, 12:00am PST
The authors describe a unified representation of occluders in light transport and photography using shield fields: the 4D attenuation function which acts on any light field incident on an...
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White Papers
Spatial Diversity and Spatial Correlation Evaluation of Measured Vehicle-to-Vehicle Radio Channels at 5.2 GHz
January 1, 2009, 12:00am PST
In this paper, the authors estimate the spatial diversity order and spatial correlations from channel sounder measurements of doubly-selective vehicle-to-vehicle MIMO radio channels in the 5.2 GHz...
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White Papers
Securing Biometric Data
April 1, 2009, 12:00am PDT
This paper discusses the application of distributed source coding techniques to biometric security. A Slepian-Wolf coding system is used to provide a secure means of storing biometric data that...
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White Papers
UWB Systems For Wireless Sensor Networks
March 1, 2009, 12:00am PST
Wireless sensor networks are emerging as an important area for communications. They enable a wealth of new applications including surveillance, building control, factory automation, and in-vehicle...
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White Papers
Implementation of a Cooperative MAC Protocol: Performance and Challenges in Real Environment
July 1, 2009, 12:00am PDT
Cooperative communication is a buzz word in research community today. It enables nodes to achieve spatial extensive investigations have been directed to closely examine its performance by means of...
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White Papers
NLOS Channel Identification and Mitigation in UltraWideband ToA-Based Wireless Sensor Networks
March 1, 2009, 12:00am PST
Recently, Ultra Wideband (UWB) Time of Arrival (ToA)-based localization in Wireless Sensor Networks (WSNs) have received considerable attention. For a typical WSN operating in indoor environments,...
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White Papers
Fast Multiple Access Selection Through Variable Power Transmissions
June 1, 2009, 12:00am PDT
Many wireless applications demand a fast mechanism to detect the packet from a node with the highest priority ("Best node") only, while packets from nodes with lower priority are irrelevant. In...
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White Papers
A New Method for Tracking Performance Evaluation Based on a Reflective Model and Perturbation Analysis
May 1, 2009, 12:00am PDT
In this paper, the authors present a novel methodology for tracking performance evaluation. Considering the continuity of the image sequences in a video, they define a new measurement called...
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White Papers
Static Power Allocation in Two-Hop MIMO Amplify-and-Forward Relay Systems
June 1, 2009, 12:00am PDT
In this paper, the authors propose a static power allocation algorithm for a two-hop Multi-Input-Multi-Output (MIMO) Amplify-and-Forward (AF) relay system in which the interim channel state...
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White Papers
Hole-Filling Method Using Depth Based In-Painting for View Synthesis in Free Viewpoint Television (FTV) and 3D Video
June 1, 2009, 12:00am PDT
Depth Image-Based Rendering (DIBR) is generally used to synthesize a virtual view in Free Viewpoint Television (FTV) and 3D video. One of the key techniques in DIBR is how to fill the holes caused...
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White Papers
Semi-Supervised Information Extraction From Variable-Length Web-Page Lists
May 1, 2009, 12:00am PDT
Modern information systems integrate, aggregate, and manage information from a large number of sources, such as databases, user input, sensors, remote web services provided by other information...
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White Papers
QoS/QoE Techniques for IPTV Transmissions
August 1, 2009, 12:00am PDT
Internet Protocol TV (IPTV) has recently gained momentum as one of the key applications in the telecommunications market. Most researchers believe that IPTV service represents a key opportunity...
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White Papers
Pilot Matrix Design for Interim Channel Estimation in Two-Hop MIMO AF Relay Systems
September 1, 2009, 12:00am PDT
In this paper, the authors are concerned with a two-hop Multi-Input-Multi-Output (MIMO) Amplify-and-Forward (AF) relay system consisting of a Source Node (SN), a Relay Node (RN), and a Destination...
Provided by Mitsubishi Electric
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White Papers
A Graph Approach to Dynamic Fractional Frequency Reuse (FFR) in Multi-Cell OFDMA Networks
July 1, 2009, 12:00am PDT
A graph-based framework for dynamic Fractional Frequency Reuse (FFR) in multi-cell OFDMA networks is proposed in this work. FFR is a promising resource allocation technique that can effectively...
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White Papers
Optimization of Split-and-Combine Relaying
September 1, 2009, 12:00am PDT
Relays play an important role for increasing rate and reducing energy consumption of wireless networks. In this paper the authors consider a three-node network (source, relay, and destination) in...
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White Papers
Analysis, Insights and Generalization of a Fast Decentralized Relay Selection Mechanism
September 1, 2009, 12:00am PDT
Relay selection for cooperative communications has attracted considerable research interest recently. While several criteria have been proposed for selecting one or more relays and analyzed,...
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White Papers
3D Pose Estimation and Segmentation Using Specular Cues
September 1, 2009, 12:00am PDT
The authors demonstrated that specular reflections can be used for localization and pose estimation of specular objects using a known CAD model. They showed that simple feature/ intensity matching...
Provided by Mitsubishi Electric
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White Papers
Geometric Sequence (GS) Imaging With Bayesian Smoothing for Optical and Capacitive Imaging Sensors
July 1, 2009, 12:00am PDT
In this paper, the authors introduce a novel technique called Geometric Sequence (GS) imaging, specifically for the purpose of low power and light weight tracking in human computer interface...
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White Papers
Optical Performance Monitoring Via Histogram: A Data-Driven Approach
September 1, 2009, 12:00am PDT
The authors apply three alternative statistical learning methods to estimate optical transmission impairments (e.g., noises, chromatic dispersion) from synchronous histograms. Linear regression...
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White Papers
Invertible Motion Blur in Video
September 1, 2009, 12:00am PDT
The authors show that motion blur in successive video frames is invertible even if the Point-Spread Function (PSF) due to motion smear in a single photo is non-invertible. Blurred photos exhibit...
Provided by Mitsubishi Electric
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White Papers
Dual Power Multiple Access With Multipacket Reception Using Local CSI
January 1, 2010, 12:00am PST
Contention-based multiple access is a crucial component of many wireless systems. Multiple-Packet Reception (MPR) schemes that use interference cancellation technique to receive and decode...
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White Papers
Intermediate View Generation for Perceived Depth Adjustment of Stereo Video
January 1, 2011, 12:00am PST
There is significant industry activity on delivery of 3D video to the home. It is expected that 3D capable devices will be able to provide consumers with the ability to adjust the depth perceived...
Provided by Mitsubishi Electric
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White Papers
Depth Reconstruction Filter and Down/Up Sampling for Depth Coding in 3D Video
July 1, 2009, 12:00am PDT
Depth images represent Three-Dimensional (3D) scene information and are commonly used for Depth Image Based Rendering (DIBR) to support 3D video and free-viewpoint video applications. The virtual...
Provided by Mitsubishi Electric
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White Papers
Regressed Importance Sampling on Manifolds for Efficient Object Tracking
November 1, 2009, 12:00am PDT
In this paper, a new integrated particle filter is proposed for video object tracking. After particles are generated by importance sampling, each particle is regressed on the transformation space...
Provided by Mitsubishi Electric
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