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Indian Institute of Technology Delhi
(28 results)-
White Papers
REEF: A Reliable and Energy Efficient Framework for Wireless Sensor Networks
March 16, 2009, 12:00am PDT
This paper presents an efficient and scalable framework called Reliable and Energy Efficient Framework (REEF) for reliable data collection in Wireless Sensor Networks. REEF employs a distributed...
Provided by Indian Institute of Technology Delhi
-
White Papers
Terrestrial Free Space LDPC Coded MIMO Optical Link
October 22, 2009, 12:00am PDT
In the present paper investigates study of a terrestrial, line-of-sight Free Space Optical (FSO) communication link using non-repetitive MIMO scheme with On OFF Keying (OOK) signal over turbulent...
Provided by Indian Institute of Technology Delhi
-
White Papers
An Analytical Framework of Survivability Model for VoIP
October 27, 2009, 12:00am PDT
Nowadays Voice over Internet Protocol (VoIP) has become an evolutionary technology in telecommunications, and hence it is very important to study and enhance its survivability measures. In this...
Provided by Indian Institute of Technology Delhi
-
White Papers
Managing Multiligual OCR Project Using XML
October 6, 2009, 12:00am PDT
This paper presents a scheme based upon XML based labeling for managing a large multilingual OCR project. Managing a large multi-lingual OCR project involving multiple research groups, developing...
Provided by Indian Institute of Technology Delhi
-
White Papers
Performance Analysis of an Improved Graded Precision Localization Algorithm for Wireless Sensor Networks
July 1, 2010, 12:00am PDT
In this paper an improved version of the graded precision localization algorithm GRADELOC, called IGRADELOC is proposed. The performance of GRADELOC is dependent on the regions formed by the...
Provided by Indian Institute of Technology Delhi
-
White Papers
Effect of Atmospheric Turbulence on Acquisition Time of Ground to Deep Space Optical Communication System
June 17, 2009, 12:00am PDT
The performance of ground to deep space optical communication systems is degraded by distortion of the beam as it propagates through the turbulent atmosphere. Turbulence causes fluctuations in the...
Provided by Indian Institute of Technology Delhi
-
White Papers
Evaluation of a Routing Architecture for Wireless Messaging Ad-Hoc Networks
January 1, 2011, 12:00am PST
The Short Messaging Service (SMS) which has become very popular in cellular networks is very highly priced. The authors show in this paper how self-organizing ad-hoc networks can be used to...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
WHOP: Wormhole Attack Detection Protocol Using Hound Packet
May 26, 2011, 12:00am PDT
The lack of centralised infrastructure in ad hoc network makes it vulnerable to various attacks. MANET routing disrupts if participating node do not perform its intended function and start...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Full Diversity Decoding in Differential DF Cooperative System With Unitary Constellations
May 24, 2012, 12:00am PDT
The authors derive a Maximum Likelihood (ML) decoder in the differential Decode-and-Forward (DF) based cooperative communication system utilizing complex-valued unitary constellations like M-PSK....
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Co-Operative Downlink Scheduling for Cell Edge and Handoff Users
March 1, 2012, 12:00am PST
The authors present a new co-operative scheduling approach which provides not only more reliability but also higher effective capacity. Cooperation region is defined for active handoff users...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Impact of Interference on Nodal Communication Range in Wireless Ad Hoc Networks
December 16, 2010, 12:00am PST
In a distributed control wireless ad hoc network, multi-user interference plays a significant role in determining one-to-one communication throughput performance of the network. Although the...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Cooperative Spectrum Sensing with an Improved Energy Detector in Cognitive Radio Network
December 7, 2010, 12:00am PST
In this paper, performance of cooperative spectrum sensing with an improved energy detector is discussed. The Cognitive Radios (CRs) utilize an improved energy detector for taking a decision of...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Krylov Algorithms for FEXT Cancellation in Upstream MIMO VDSL
December 30, 2009, 12:00am PST
In this paper, the authors show that Krylov subspace techniques are well suited for cancellation of Far End CROSSTalk (FEXT) in MIMO Digital Subscriber Lines (DSL). These methods are...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Performance Analysis of a Multi-Relay Cooperative Diversity Network With Decode and Forward Relaying
December 31, 2009, 12:00am PST
Consider a multi-relay cooperative diversity network consisting of a source, N relays, and a destination. For the transmission of a data symbol from the source to the destination, the relays...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Improved Array Processing for Two-User Detection of Alamouti Code
December 31, 2009, 12:00am PST
Recently, it is shown in that by interference cancellation through zero-forcing a diversity order of 2(M - 1) can be achieved in a Multiple Access Channels (MAC) based uplink two-user MIMO system...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Generalised Pseudocirculants: Dual-Rate Systems, Cyclostationary Signals
December 14, 2009, 12:00am PST
The well known pseudocirculant property is generalised in this paper. The generalised pseudocirculant property of the transfer matrix of a blocked linear dual-rate system is proved to be the...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Cyclostationary Signals in Multirate Linear Systems
December 14, 2009, 12:00am PST
This paper presents a systematic approach to use Time Frequency Representation (TFR) for the analysis of cyclostationary signals in multirate linear systems. The authors exploit the ability of...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Mitigation of Exposed Terminals Problem With Differential Capture Capable Receivers
December 24, 2009, 12:00am PST
Recent experimental studies on physical layer capture in 802.11 based networks have demonstrated that the minimum signal-to-interference ratio required for successful reception of a frame depends...
Provided by Indian Institute of Technology Delhi
-
White Papers
Throughput Modeling of Multihop Radial Wireless Sensor Networks
January 18, 2009, 12:00am PST
This paper presents an analytic model for throughput characterization in a single sink multi-hop wireless sensor network. The numerical results show that, for a given node density, due to...
Provided by Indian Institute of Technology Delhi
-
White Papers
Characterization of Aloha in Underwater Wireless Networks
December 19, 2009, 12:00am PST
This paper provides an analytic framework of Aloha and Slotted Aloha (S-Aloha) performance in an underwater one-to-one communication environment with high and random inter-nodal signal propagation...
Provided by Indian Institute of Technology Delhi
-
White Papers
A Novel Approach for Finding Optimal Number of Cluster Head in Wireless Sensor Network
December 8, 2010, 12:00am PST
Prolonging life time is the most important designing objectives in Wireless Sensor Networks (WSN). In WSN the total amount of energy is limited, how to make best use of the limited resource energy...
Provided by Indian Institute of Technology Delhi
-
White Papers
Hierarchical Neighbor Graphs: A Fully Distributed Topology for Data Collection in Wireless Sensor Networks
January 21, 2010, 12:00am PST
The authors introduce hierarchical neighbor graphs, a new topology control mechanism for wireless sensor networks. This mechanism is a randomized one that takes a single parameter, 0 < p < 1, and...
Provided by Indian Institute of Technology Delhi
-
White Papers
The Effects of Node Cooperation Level on Routing Performance in Delay Tolerant Networks
January 13, 2009, 12:00am PST
In this paper, the authors analyze the effect of different degrees of node cooperation on the performance of routing protocols for delay tolerant networks. They first present an accurate...
Provided by Indian Institute of Technology Delhi
-
White Papers
Evaluating Load Balancing in Peer-to-Peer Resource Sharing Algorithms ForWireless Mesh Networks
July 15, 2008, 12:00am PDT
Wireless mesh networks are a promising area for the deployment of new wireless communication and networking technologies. In this paper, the authors address the problem of enabling effective...
Provided by Indian Institute of Technology Delhi
-
White Papers
Measurements in OLPC Mesh Networks
May 7, 2009, 12:00am PDT
The ease of deployment and the self configurable aspect of wireless mesh networks has generated lot of interest in them during the recent years. The One Laptop Per Child (OLPC) project uses mesh...
Provided by Indian Institute of Technology Delhi
-
White Papers
On Matching Latent to Latent Fingerprints
August 15, 2011, 12:00am PDT
This paper presents a forensics application of matching two latent fingerprints. In crime scene settings, it is often required to match multiple latent fingerprints. Unlike matching latent with...
Provided by Indian Institute of Technology Delhi
-
White Papers
Design and Implementation of the Work Flow of an Academic Cloud
September 26, 2011, 12:00am PDT
In this paper, the authors discuss the design and implementation of an academic cloud service, which they call Baadal. Tailored for academic and research requirements, Baadal bridges the gap...
Provided by Indian Institute of Technology Delhi
-
White Papers
Mobility Improvement in IEEE 802.16
November 22, 2007, 12:00am PST
WiMAX, IEEE standard 802.16 has attracted attention of users and industry, for its promise of delivering broadband wireless connection. WiMAX was initially developed as a fixed wireless broadband...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Mitigation of Exposed Terminals Problem With Differential Capture Capable Receivers
December 24, 2009, 12:00am PST
Recent experimental studies on physical layer capture in 802.11 based networks have demonstrated that the minimum signal-to-interference ratio required for successful reception of a frame depends...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Cyclostationary Signals in Multirate Linear Systems
December 14, 2009, 12:00am PST
This paper presents a systematic approach to use Time Frequency Representation (TFR) for the analysis of cyclostationary signals in multirate linear systems. The authors exploit the ability of...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Generalised Pseudocirculants: Dual-Rate Systems, Cyclostationary Signals
December 14, 2009, 12:00am PST
The well known pseudocirculant property is generalised in this paper. The generalised pseudocirculant property of the transfer matrix of a blocked linear dual-rate system is proved to be the...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Improved Array Processing for Two-User Detection of Alamouti Code
December 31, 2009, 12:00am PST
Recently, it is shown in that by interference cancellation through zero-forcing a diversity order of 2(M - 1) can be achieved in a Multiple Access Channels (MAC) based uplink two-user MIMO system...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Performance Analysis of a Multi-Relay Cooperative Diversity Network With Decode and Forward Relaying
December 31, 2009, 12:00am PST
Consider a multi-relay cooperative diversity network consisting of a source, N relays, and a destination. For the transmission of a data symbol from the source to the destination, the relays...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Krylov Algorithms for FEXT Cancellation in Upstream MIMO VDSL
December 30, 2009, 12:00am PST
In this paper, the authors show that Krylov subspace techniques are well suited for cancellation of Far End CROSSTalk (FEXT) in MIMO Digital Subscriber Lines (DSL). These methods are...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Cooperative Spectrum Sensing with an Improved Energy Detector in Cognitive Radio Network
December 7, 2010, 12:00am PST
In this paper, performance of cooperative spectrum sensing with an improved energy detector is discussed. The Cognitive Radios (CRs) utilize an improved energy detector for taking a decision of...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Impact of Interference on Nodal Communication Range in Wireless Ad Hoc Networks
December 16, 2010, 12:00am PST
In a distributed control wireless ad hoc network, multi-user interference plays a significant role in determining one-to-one communication throughput performance of the network. Although the...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Co-Operative Downlink Scheduling for Cell Edge and Handoff Users
March 1, 2012, 12:00am PST
The authors present a new co-operative scheduling approach which provides not only more reliability but also higher effective capacity. Cooperation region is defined for active handoff users...
Provided by Indian Institute of Technology Delhi
-
Whitepapers
Full Diversity Decoding in Differential DF Cooperative System With Unitary Constellations
May 24, 2012, 12:00am PDT
The authors derive a Maximum Likelihood (ML) decoder in the differential Decode-and-Forward (DF) based cooperative communication system utilizing complex-valued unitary constellations like M-PSK....
Provided by Indian Institute of Technology Delhi
-
Whitepapers
WHOP: Wormhole Attack Detection Protocol Using Hound Packet
May 26, 2011, 12:00am PDT
The lack of centralised infrastructure in ad hoc network makes it vulnerable to various attacks. MANET routing disrupts if participating node do not perform its intended function and start...
Provided by Indian Institute of Technology Delhi
-
White Papers
Design and Implementation of the Work Flow of an Academic Cloud
September 26, 2011, 12:00am PDT
In this paper, the authors discuss the design and implementation of an academic cloud service, which they call Baadal. Tailored for academic and research requirements, Baadal bridges the gap...
Provided by Indian Institute of Technology Delhi
-
White Papers
On Matching Latent to Latent Fingerprints
August 15, 2011, 12:00am PDT
This paper presents a forensics application of matching two latent fingerprints. In crime scene settings, it is often required to match multiple latent fingerprints. Unlike matching latent with...
Provided by Indian Institute of Technology Delhi
-
White Papers
Measurements in OLPC Mesh Networks
May 7, 2009, 12:00am PDT
The ease of deployment and the self configurable aspect of wireless mesh networks has generated lot of interest in them during the recent years. The One Laptop Per Child (OLPC) project uses mesh...
Provided by Indian Institute of Technology Delhi
-
White Papers
Evaluating Load Balancing in Peer-to-Peer Resource Sharing Algorithms ForWireless Mesh Networks
July 15, 2008, 12:00am PDT
Wireless mesh networks are a promising area for the deployment of new wireless communication and networking technologies. In this paper, the authors address the problem of enabling effective...
Provided by Indian Institute of Technology Delhi
-
White Papers
The Effects of Node Cooperation Level on Routing Performance in Delay Tolerant Networks
January 13, 2009, 12:00am PST
In this paper, the authors analyze the effect of different degrees of node cooperation on the performance of routing protocols for delay tolerant networks. They first present an accurate...
Provided by Indian Institute of Technology Delhi
-
White Papers
Hierarchical Neighbor Graphs: A Fully Distributed Topology for Data Collection in Wireless Sensor Networks
January 21, 2010, 12:00am PST
The authors introduce hierarchical neighbor graphs, a new topology control mechanism for wireless sensor networks. This mechanism is a randomized one that takes a single parameter, 0 < p < 1, and...
Provided by Indian Institute of Technology Delhi
-
White Papers
A Novel Approach for Finding Optimal Number of Cluster Head in Wireless Sensor Network
December 8, 2010, 12:00am PST
Prolonging life time is the most important designing objectives in Wireless Sensor Networks (WSN). In WSN the total amount of energy is limited, how to make best use of the limited resource energy...
Provided by Indian Institute of Technology Delhi
-
White Papers
Characterization of Aloha in Underwater Wireless Networks
December 19, 2009, 12:00am PST
This paper provides an analytic framework of Aloha and Slotted Aloha (S-Aloha) performance in an underwater one-to-one communication environment with high and random inter-nodal signal propagation...
Provided by Indian Institute of Technology Delhi
-
White Papers
Throughput Modeling of Multihop Radial Wireless Sensor Networks
January 18, 2009, 12:00am PST
This paper presents an analytic model for throughput characterization in a single sink multi-hop wireless sensor network. The numerical results show that, for a given node density, due to...
Provided by Indian Institute of Technology Delhi
-
White Papers
Evaluation of a Routing Architecture for Wireless Messaging Ad-Hoc Networks
January 1, 2011, 12:00am PST
The Short Messaging Service (SMS) which has become very popular in cellular networks is very highly priced. The authors show in this paper how self-organizing ad-hoc networks can be used to...
Provided by Indian Institute of Technology Delhi
-
White Papers
Effect of Atmospheric Turbulence on Acquisition Time of Ground to Deep Space Optical Communication System
June 17, 2009, 12:00am PDT
The performance of ground to deep space optical communication systems is degraded by distortion of the beam as it propagates through the turbulent atmosphere. Turbulence causes fluctuations in the...
Provided by Indian Institute of Technology Delhi
-
White Papers
Performance Analysis of an Improved Graded Precision Localization Algorithm for Wireless Sensor Networks
July 1, 2010, 12:00am PDT
In this paper an improved version of the graded precision localization algorithm GRADELOC, called IGRADELOC is proposed. The performance of GRADELOC is dependent on the regions formed by the...
Provided by Indian Institute of Technology Delhi
-
White Papers
Managing Multiligual OCR Project Using XML
October 6, 2009, 12:00am PDT
This paper presents a scheme based upon XML based labeling for managing a large multilingual OCR project. Managing a large multi-lingual OCR project involving multiple research groups, developing...
Provided by Indian Institute of Technology Delhi
-
White Papers
An Analytical Framework of Survivability Model for VoIP
October 27, 2009, 12:00am PDT
Nowadays Voice over Internet Protocol (VoIP) has become an evolutionary technology in telecommunications, and hence it is very important to study and enhance its survivability measures. In this...
Provided by Indian Institute of Technology Delhi
-
White Papers
Terrestrial Free Space LDPC Coded MIMO Optical Link
October 22, 2009, 12:00am PDT
In the present paper investigates study of a terrestrial, line-of-sight Free Space Optical (FSO) communication link using non-repetitive MIMO scheme with On OFF Keying (OOK) signal over turbulent...
Provided by Indian Institute of Technology Delhi
-
White Papers
REEF: A Reliable and Energy Efficient Framework for Wireless Sensor Networks
March 16, 2009, 12:00am PDT
This paper presents an efficient and scalable framework called Reliable and Energy Efficient Framework (REEF) for reliable data collection in Wireless Sensor Networks. REEF employs a distributed...
Provided by Indian Institute of Technology Delhi
-
White Papers
Mobility Improvement in IEEE 802.16
November 22, 2007, 12:00am PST
WiMAX, IEEE standard 802.16 has attracted attention of users and industry, for its promise of delivering broadband wireless connection. WiMAX was initially developed as a fixed wireless broadband...
Provided by Indian Institute of Technology Delhi
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