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Indian Institute of Science
(124 results)-
White Papers
Amplify and Forward for Correlated Data Gathering Over Hierarchical Sensor Networks
January 4, 2009, 12:00am PST
This paper addresses the problem of estimating a random field via a wireless sensor network. The paper uses a Multiple Access Channel (MAC) as the basic building block for such a network. For...
Provided by Indian Institute of Science
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I/O Device Virtualization in the Multi-Core Era, a QoS Perspective
March 18, 2009, 12:00am PDT
This paper proposes an extension to the I/O device architecture, as recommended in the PCI-SIG IOV specification, for virtualizing network I/O devices. The aim is to enable fine-grained controls...
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Prediction of Hard Drive Failures Via Rule Discovery From AutoSupport Data
September 18, 2009, 12:00am PDT
The ability to accurately predict an impending hard disk failure is important for reliable storage system design. The facility provided by most hard drive manufacturers, called S.M.A.R.T....
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White Papers
Metadata Interoperability for Cataloguing of E-Journals : A Comparative Study of LIBSYS, MARC21, AND CONSER
May 19, 2010, 12:00am PDT
Here is a comparative study of LIBSYS, MARC21, and CONSER to present the concept of metadata interoperability for cataloguing of e-journals. Any digital library includes data and metadata that...
Provided by Indian Institute of Science
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White Papers
Routing Capability and Blocking Analysis of Dynamic ROADM Optical Networks (Category - II) for Dynamic Traffic
June 13, 2009, 12:00am PDT
Reconfigurable Optical Add/Drop Multiplexers (ROADMs) can be classified into three categories based on their underlying switching technologies. Category I consists of a single large optical...
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White Papers
Reliable Multicast in Multi - Access Wireless LANs
January 1, 2010, 12:00am PST
Multicast is an efficient paradigm for transmitting data from a sender to a group of receivers. This paper focus on multicast in single channel multi - access wireless Local Area Networks (LANs)...
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White Papers
Multicast Routing for Mobile Ad-Hoc Networks Using Swarm Intelligence
May 1, 2009, 12:00am PDT
An ad hoc network is a multi-hop wireless network formed by a collection of mobile nodes without the intervention of fixed infrastructure. Multicasting is an efficient way of providing services...
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White Papers
Field Flow Sensitive Pointer and Escape Analysis for Java Using Heap Array SSA
January 13, 2008, 12:00am PST
Context sensitive pointer analyses based on the bddbddb system have been shown to scale to large Java programs. This paper provides a technique to incorporate flow sensitivity for Java fields into...
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White Papers
Performance Analysis of Wireless Ad-Hoc Networks
January 1, 2010, 12:00am PST
With the growing importance of wireless ad hoc networks (particularly, in applications such as wireless local area networks, and ad hoc sensor networks) it is important to develop an understanding...
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White Papers
Obstacle Constrained Total Area Coverage in Wireless Sensor Networks
January 26, 2010, 12:00am PST
A Wireless Sensor Network (WSN) consists of a large number of tiny, low-powered devices, called sensors, which communicate with each other (possibly) in a multi-hop fashion. These sensors suffer...
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White Papers
A Transform Approach to Linear Network Coding for Acyclic Networks With Delay
March 20, 2011, 12:00am PDT
Network coding was introduced in as a means to improve the rate of transmission in networks. Linear network coding was introduced in and it was found to be sufficient to achieve the maxflow-mincut...
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White Papers
On Network-Error Correcting Convolutional Codes Under the BSC Edge Error Model
January 7, 2010, 12:00am PST
The performance of CNECCs under the BSC edge error model has been analyzed using theoretical bounds and simulations. A sufficient upper bound on the edge cross-over probability pe has been...
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White Papers
Analytical Modeling of Saturation Throughput in Power Save Mode of an IEEE 802.11 Infrastructure WLAN
December 21, 2010, 12:00am PST
The authors consider a single STAtion (STA) in the Power Save Mode (PSM) of an IEEE 802.11 infrastructure WLAN. This STA is assumed to be carrying uplink and downlink traffic via the Access Point...
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White Papers
Distributed Construction of the Critical Geometric Graph in Dense Wireless Sensor Networks
November 15, 2010, 12:00am PST
Wireless sensor networks are often modeled in terms of a dense deployment of smart sensor nodes in a two-dimensional region. Given a node deployment, the Critical Geometric Graph (CGG) over these...
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White Papers
FRFD MIMO Systems: Precoded V-BLAST With Limited Feedback Versus Non-Orthogonal STBC MIMO
January 19, 2009, 12:00am PST
Full-Rate (FR) and Full-Diversity (FD) are attractive features in MIMO systems. The authors refer to systems which achieve both FR and FD simultaneously as FRFD systems. Non-orthogonal STBCs can...
Provided by Indian Institute of Science
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White Papers
NNRU, a Noncommutative Analogue of NTRU
February 11, 2009, 12:00am PST
NTRU public key cryptosystem is well studied lattice-based Cryptosystem along with Ajtai-Dwork and GGH systems. Underlying NTRU is a hard mathematical problem of finding short vectors in a certain...
Provided by Indian Institute of Science
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White Papers
Convolutional Codes for Network-Error Correction
August 6, 2009, 12:00am PDT
In this paper, the authors introduce convolutional codes for network-error correction in the context of coherent network coding. They give a construction of convolutional codes that correct a...
Provided by Indian Institute of Science
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White Papers
Modeling Multi-Cell IEEE 802.11 WLANs With Application to Channel Assignment
March 14, 2009, 12:00am PDT
The authors provide a simple and accurate analytical model for multi-cell infrastructure IEEE 802.11 WLANs. The model applies if the cell radius, R, is much smaller than the carrier sensing range,...
Provided by Indian Institute of Science
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White Papers
Delay Modelling for a Single-Hop Wireless Mesh Network Under Light Aggregate Traffic
September 3, 2010, 12:00am PDT
The IEEE 802.11 has become ubiquitous and gained widespread popularity as a protocol for wireless networks. As a result, various models have been proposed to analyze and model the parameters of...
Provided by Indian Institute of Science
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White Papers
Aggregate AP Throughputs for Long File Transfers in a WLAN Controlled by Inhomogeneous TCP Connections
September 5, 2010, 12:00am PDT
This paper is concerned with infrastructure mode WLANs that use the IEEE 802.11 DCF mechanism. The authors are interested in analytical models for evaluating the performance of TCP controlled...
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White Papers
A Novel Algorithm for Cooperative Distributed Sequential Spectrum Sensing in Cognitive Radio
October 6, 2010, 12:00am PDT
Presently there is a scarcity of wireless spectrum worldwide due to an increase in wireless services. Cognitive Radios are proposed as a solution to this problem. They access the spectrum licensed...
Provided by Indian Institute of Science
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White Papers
Secrecy Capacity of the Gaussian Wire-Tap Channel With Finite Complex Constellation Input
October 6, 2010, 12:00am PDT
The secrecy capacity of a discrete memoryless Gaussian Wire-Tap Channel when the input is from a finite complex constellation is studied. It is shown that the secrecy capacity curves of a finite...
Provided by Indian Institute of Science
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White Papers
Tunable Locally-Optimal Geographical Forwarding in Wireless Sensor Networks With Sleep-Wake Cycling Nodes
December 21, 2009, 12:00am PST
The authors consider a wireless sensor network whose main function is to detect certain infrequent alarm events, and to forward alarm packets to a base station, using geographical forwarding. The...
Provided by Indian Institute of Science
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White Papers
Key Distribution Scheme Without Deployment Knowledge
August 29, 2009, 12:00am PDT
Many basic key distribution schemes specifically tuned to wireless sensor networks have been proposed in the literature. Recently, several researchers have proposed schemes in which they have used...
Provided by Indian Institute of Science
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White Papers
High-Rate, Distributed Training-Embedded Complex Orthogonal Designs for Relay Networks
August 1, 2009, 12:00am PDT
Distributed Space-Time Block Codes (DSTBCs) from Complex Orthogonal Designs (CODs) (both square and non-square CODs other than the Alamouti design) are known to lose their Single-Symbol ML...
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White Papers
A New Paradigm of NAV Alteration to Overcome Masked Node Problem in 802.11 MAC Based MANETs
February 8, 2008, 12:00am PST
In a Mobile Ad hoc NETwork (MANET) one essential issue is to resolve potential contention and collision between mobile hosts in order to utilize the radio spectrum efficiently on using the medium....
Provided by Indian Institute of Science
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White Papers
Estimation of BT Interference and Equivalent Channel Taps in OFDM Based WLANs in Multipath Fading Channel
May 15, 2008, 12:00am PDT
One of the major sources of interference for WLANs operating in 2.4GHz unlicensed ISM is Bluetooth (BT). Though OFDM based WLAN's have features like strong immunity to multipath channel effects,...
Provided by Indian Institute of Science
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White Papers
Transaction-Based QoS Management in a Hybrid Wireless Superstore Environment
March 1, 2011, 12:00am PST
Hybrid wireless networks are extensively used in the superstores, marketplaces, malls, etc. and provide high QoS (Quality of Service) to the end-users has become a challenging task. In this paper,...
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Whitepapers
Computer Processing of Electroencephalographic Signals for Functional Connectivity Analysis of the Brain Using Graph Theoretic Techniques
November 29, 2011, 12:00am PST
Computer processing of biomedical signals have gained a lot of importance because its extensive applications in healthcare. Extensive studies have been made on various aspects of bioengineering...
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Whitepapers
Secure Compute-and-Forward in a Bidirectional Relay
June 26, 2012, 12:00am PDT
Bidirectional relaying, where a relay helps two user nodes to exchange messages has been an active area of recent research. In the compute-and-forward strategy for bidirectional relaying, the...
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Whitepapers
A Novel Association Policy for Web Browsing in a Multirate WLAN
August 13, 2010, 12:00am PDT
The authors obtain an association policy for STAs in an IEEE 802.11 WLAN by taking into account explicitly two aspects of practical importance: TCP-controlled short file downloads interspersed...
Provided by Indian Institute of Science
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Whitepapers
Diversity-Rate Trade-Off for Fading Channels With Power Control
May 24, 2012, 12:00am PDT
The authors consider a complex, additive, white Gaussian noise channel with flat fading. They study its diversity order vs transmission rate for some known power allocation schemes. The capacity...
Provided by Indian Institute of Science
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Whitepapers
Cooperative Particle Swarm Optimization Based Receiver for Large-Dimension MIMO-ZPSC Systems
March 12, 2012, 12:00am PDT
In this paper, the authors propose a Cooperative Particle Swarm Optimization (CPSO) based channel estimation/equalization scheme for Multiple-Input Multiple-Output Zero-Padded Single-Carrier...
Provided by Indian Institute of Science
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Whitepapers
Dual Band (WLAN & WiMAX) Suppressed Harmonic Microstrip Filter With Perturbed Ground
December 7, 2010, 12:00am PST
Design of a dual band pass filter employing microstrip line with defected ground is presented in this paper. A dual band filter at 2.45GHz and 3.5GHz (covering WLAN and WiMAX) with 6% bandwidth...
Provided by Indian Institute of Science
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Whitepapers
Performance Analysis of Data and Voice Connections in a Cognitive Radio Network
December 7, 2010, 12:00am PST
The authors study the performance of cognitive (secondary) users in a cognitive radio network which uses a channel whenever the primary users are not using the channel. The usage of the channel by...
Provided by Indian Institute of Science
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Whitepapers
Bulk File Download Throughput in a Single Station WLAN With Nonzero Propagation Delay
December 8, 2010, 12:00am PST
The authors analyze TCP-controlled bulk file transfers in a single station WLAN with nonzero propagation delay between the file server and the WLAN. Their approach is to model the flow of packets...
Provided by Indian Institute of Science
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Whitepapers
Hand Pose Recognition Using Geometric Features
December 9, 2010, 12:00am PST
In this paper, a novel approach for hand pose recognition by using key geometrical features of hand is proposed. A skeletal hand model is constructed to analyze the abduction and adduction...
Provided by Indian Institute of Science
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Whitepapers
An Improved Connected Component Labeling by Recursive Label Propagation
December 9, 2010, 12:00am PST
This paper describes a novel approach to the connected component labeling problem, derived from two fast labeling algorithms, Wu et al. and Park et al. The authors propose a method that improves...
Provided by Indian Institute of Science
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Whitepapers
Application Delay Modelling for Variable Length Packets in Single Cell IEEE 802.11 WLANs
December 6, 2010, 12:00am PST
The IEEE 802.11 has become ubiquitous and gained widespread popularity as a protocol for wireless networks. As a result, various models have been proposed to analyze and model the parameters of...
Provided by Indian Institute of Science
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Whitepapers
Efficient Post-Processing Techniques for Speech Enhancement
December 9, 2010, 12:00am PST
The authors address the problem of speech enhancement in real-world noisy scenarios. They propose to solve the problem in two stages, the first comprising a generalized spectral subtraction...
Provided by Indian Institute of Science
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Whitepapers
Improved IDS Using Layered CRFS With Logon Restrictions and Mobile Alerts Based on Deviant System Behaviour
March 1, 2013, 12:00am PST
With the ever increasing number and diverse type of attacks, including new and previously unseen attacks, the effectiveness of an intrusion detection system is very important. Hence there is high...
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Whitepapers
Measurement Based Impromptu Deployment of a Multi-Hop Wireless Relay Network
March 11, 2013, 12:00am PDT
The authors study the problem of optimal sequential ("As-you-go") deployment of wireless relay nodes, as a person walks along a line of random length (with a known distribution). The objective is...
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Whitepapers
Wireless Network-Coded Multi-Way Relaying Using Latin Hyper-Cubes
March 1, 2013, 12:00am PST
The two-stage protocol for physical layer network coding for the two-way relay channel first introduced in 2006, exploits the multiple access interference occurring at the relay so that the...
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Whitepapers
Distributed Transmission of Functions of Correlated Sources Over a Fading Multiple Access Channel
September 24, 2009, 12:00am PDT
In this paper, the authors address the problem of distributed transmission of functions of correlated sources over a fast fading Multiple Access Channel (MAC). This is a basic building block in a...
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Whitepapers
Distributed Joint Source- Channel Coding for Functions Over a Multiple Access Channel
July 23, 2009, 12:00am PDT
Sensor networks are used in a wide variety of applications due to their ability to operate in environments where human penetration is not possible. One killer application of such networks is...
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Joint Source-Channel Coding Over a Fading Multiple Access Channel with Partial Channel State Information
July 23, 2009, 12:00am PDT
In this paper, the authors address the problem of transmission of correlated sources over a fast fading Multiple Access Channel (MAC) with partial channel state information available at both the...
Provided by Indian Institute of Science
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Whitepapers
Diversity Order vs Rate in an AWGN Channel
October 5, 2011, 12:00am PDT
The authors study the diversity order vs. rate of an Additive White Gaussian noise (AWGN) channel in the whole capacity region. They show that for discrete input as well as for continuous input,...
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Capacity of a Gaussian MAC with Energy Harvesting Transmit Nodes
April 10, 2012, 12:00am PDT
The authors consider a Gaussian Multiple Access Channel (GMAC) where the users are sensor nodes powered by energy harvesters. The energy harvesters may have finite or infinite buffer to store the...
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Achievable Secrecy Sum-Rate in a Fading MAC-WT with Power Control and without CSI of Eavesdropper
October 17, 2011, 12:00am PDT
The authors consider a two user fading Multiple Access Channel with a Wire-Tapper (MAC-WT) where the transmitter has the Channel State Information (CSI) to the intended receiver but not to the...
Provided by Indian Institute of Science
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Whitepapers
Modelling and Analysis of New Coolstreaming for P2P IPTV
September 28, 2012, 12:00am PDT
Peer to peer networks are being used extensively nowadays for file sharing, video on demand and live streaming. For IPTV, delay deadlines are more stringent compared to file sharing....
Provided by Indian Institute of Science
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On Secrecy Above Secrecy Capacity
March 21, 2012, 12:00am PDT
Information theoretic security is being widely studied in recent times. It provides fundamental limits of secret communication. Unlike in cryptography, the information theoretic techniques are not...
Provided by Indian Institute of Science
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Information Capacity of an Energy Harvesting Sensor Node
December 13, 2012, 12:00am PST
Energy harvesting sensor nodes are gaining popularity due to their ability to improve the network life time and are becoming a preferred choice supporting "Green Communication". In this paper, the...
Provided by Indian Institute of Science
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Perormance Analysis of a Node Monitoring Protocol in Ubiquitous Networks
March 14, 2013, 12:00am PDT
The proliferation of the ubiquitous applications in different sphere of life like ubiquitous health monitoring system, and ubiquitous learning system demands the network monitoring, to check...
Provided by Indian Institute of Science
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Distributed Co-Phasing for Binary Consensus in Wireless Sensor Networks
December 19, 2012, 12:00am PST
The authors address the problem of binary consensus over noisy, fading channels. They propose a new transmission model using Distributed Co-phasing that ensures the system to reach accurate...
Provided by Indian Institute of Science
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Adaptive Scheduling in Real-Time Systems Through Period Adjustment
December 14, 2012, 12:00am PST
Real-time system technology traditionally developed for safety critical systems, has now been extended to support multimedia systems and virtual reality. A large number of real-time application,...
Provided by Indian Institute of Science
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Whitepapers
Throughput Analysis of Primary and Secondary Networks in a Shared IEEE 802.11 System
December 6, 2012, 12:00am PST
In this paper, the authors analyze the coexistence of a primary and a secondary (cognitive) network when both networks use the IEEE 802.11 based distributed coordination function for medium access...
Provided by Indian Institute of Science
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On Addressing Efficiency Concerns in Privacy Preserving Data Mining
February 1, 2008, 12:00am PST
Data mining services require accurate input data for their results to be meaningful, but privacy concerns may influence users to provide spurious information. To encourage users to provide correct...
Provided by Indian Institute of Science
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Neighbor Oblivious Link Reversal Over Duty-Cycled WSNs
January 15, 2010, 12:00am PST
The authors propose partial and full link reversal algorithms to bypass voids during geographic routing over duty-cycled wireless sensor networks. They propose a distributed approach that is...
Provided by Indian Institute of Science
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Whitepapers
A Double U-Slot Patch Antenna With Dual Wideband Characteristics
December 30, 2009, 12:00am PST
Microstrip patch antennas are strong candidates for use in many wireless communications applications. This paper proposes the use of a patch antenna with two U-shaped slots to achieve dual band...
Provided by Indian Institute of Science
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Whitepapers
Opportunistic Splitting for Scheduling Via Stochastic Approximation
January 15, 2010, 12:00am PST
The authors consider the problem of scheduling a wireless channel among multiple users. A slot is given to a user with a highest metric (e.g., channel gain) in that slot. The scheduler may not...
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Low-Complexity, Information Lossless STBCs for Two-User MISO-MAC With Partial CSIT
December 31, 2009, 12:00am PST
In this paper, Space-Time Block Codes (STBCs) with low Maximum-Likelihood (ML) decoding complexity and information-losslessness property are proposed for a two-user Multiple-Input Single-Output,...
Provided by Indian Institute of Science
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On Approximately Universal Schemes for Two-Hop Network
December 24, 2009, 12:00am PST
Full-duplex and half-duplex two-hop networks are considered. Explicit coding schemes which are approximately universal over a class of fading distributions are identified, for the case when the...
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No-Zero-Entry, Square, Single-Symbol ML Decodable STBCs
January 3, 2010, 12:00am PST
Space-time block codes based on Orthogonal Designs (ODs) are used for wireless communications with multiple transmit antennas which can achieve full transmit diversity along single-symbol...
Provided by Indian Institute of Science
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Simulation Study of LDPC Codes for Nonuniform Sources With Side Information in Slepian-Wolf Coding
January 7, 2010, 12:00am PST
The principles of distributed source coding or Slepian-Wolf coding, primarily employed for compression of correlated sources with side information, can also be used for reducing the encoder...
Provided by Indian Institute of Science
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Explicit Codes Uniformly Reducing Repair Bandwidth in Distributed Storage
December 24, 2009, 12:00am PST
A distributed storage setting is considered where a file of size B is to be stored across n storage nodes. A data collector should be able to reconstruct the entire data by downloading the symbols...
Provided by Indian Institute of Science
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Interference Alignment as a Tool in Network Coding as Applied to Distributed Storage
December 24, 2009, 12:00am PST
In this paper, the authors outline an approach to the task of designing network codes in a non-multicast setting. Their approach makes use of the concept of interference alignment. As an example,...
Provided by Indian Institute of Science
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A Vertical Handoff Decision Scheme for End-to-End QoS in Heterogeneous Networks: An Implementation on a Mobile IP Testbed
December 8, 2010, 12:00am PST
A prominent function of a mobile host is seamless Vertical HandOff (VHO) that ensures application service continuity and quality. VHO decision algorithms that have been proposed in the paper...
Provided by Indian Institute of Science
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Cooperative Distributed Sequential Spectrum Sensing
December 8, 2010, 12:00am PST
The authors consider cooperative spectrum sensing for cognitive radios. They develop an energy efficient detector with low detection delay using sequential hypothesis testing. Sequential...
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Frequency Detection From Multiplexed Compressed Sensing of Noisy Signals
December 9, 2010, 12:00am PST
Signal acquisition under a compressed sensing scheme offers the possibility of acquisition and reconstruction of signals sparse on some basis incoherent with measurement kernel with sub-Nyquist...
Provided by Indian Institute of Science
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Electronically Tunable Zero Order Resonator Based On CRLH-TLs
December 9, 2010, 12:00am PST
Composite Right/Left Handed (CRLH) Transmission Line (TL) based electronically tunable 1.5 cell Zero Order Resonator (ZOR) is demonstrated with microstrip technology by use of varactors. A novel...
Provided by Indian Institute of Science
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Generation of a Short-Duration Ultrawideband Chirped-Pulse Using CRLH Transmission Lines
December 5, 2010, 12:00am PST
In this paper, the authors present the various design issues related to CRLH-Transmission lines for the generation of short duration Ultra-Wideband chirped-pulse. The major parameters of the CRLH...
Provided by Indian Institute of Science
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Whitepapers
Efficient Post-Processing Techniques for Speech Enhancement
December 9, 2010, 12:00am PST
The authors address the problem of speech enhancement in real-world noisy scenarios. They propose to solve the problem in two stages, the first comprising a generalized spectral subtraction...
Provided by Indian Institute of Science
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Whitepapers
Application Delay Modelling for Variable Length Packets in Single Cell IEEE 802.11 WLANs
December 6, 2010, 12:00am PST
The IEEE 802.11 has become ubiquitous and gained widespread popularity as a protocol for wireless networks. As a result, various models have been proposed to analyze and model the parameters of...
Provided by Indian Institute of Science
-
Whitepapers
An Improved Connected Component Labeling by Recursive Label Propagation
December 9, 2010, 12:00am PST
This paper describes a novel approach to the connected component labeling problem, derived from two fast labeling algorithms, Wu et al. and Park et al. The authors propose a method that improves...
Provided by Indian Institute of Science
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Whitepapers
Hand Pose Recognition Using Geometric Features
December 9, 2010, 12:00am PST
In this paper, a novel approach for hand pose recognition by using key geometrical features of hand is proposed. A skeletal hand model is constructed to analyze the abduction and adduction...
Provided by Indian Institute of Science
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Whitepapers
Bulk File Download Throughput in a Single Station WLAN With Nonzero Propagation Delay
December 8, 2010, 12:00am PST
The authors analyze TCP-controlled bulk file transfers in a single station WLAN with nonzero propagation delay between the file server and the WLAN. Their approach is to model the flow of packets...
Provided by Indian Institute of Science
-
Whitepapers
Performance Analysis of Data and Voice Connections in a Cognitive Radio Network
December 7, 2010, 12:00am PST
The authors study the performance of cognitive (secondary) users in a cognitive radio network which uses a channel whenever the primary users are not using the channel. The usage of the channel by...
Provided by Indian Institute of Science
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Whitepapers
Dual Band (WLAN & WiMAX) Suppressed Harmonic Microstrip Filter With Perturbed Ground
December 7, 2010, 12:00am PST
Design of a dual band pass filter employing microstrip line with defected ground is presented in this paper. A dual band filter at 2.45GHz and 3.5GHz (covering WLAN and WiMAX) with 6% bandwidth...
Provided by Indian Institute of Science
-
Whitepapers
Cooperative Particle Swarm Optimization Based Receiver for Large-Dimension MIMO-ZPSC Systems
March 12, 2012, 12:00am PDT
In this paper, the authors propose a Cooperative Particle Swarm Optimization (CPSO) based channel estimation/equalization scheme for Multiple-Input Multiple-Output Zero-Padded Single-Carrier...
Provided by Indian Institute of Science
-
Whitepapers
Diversity-Rate Trade-Off for Fading Channels With Power Control
May 24, 2012, 12:00am PDT
The authors consider a complex, additive, white Gaussian noise channel with flat fading. They study its diversity order vs transmission rate for some known power allocation schemes. The capacity...
Provided by Indian Institute of Science
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