Indian Institute of Technology Kanpur

Displaying 1-40 of 66 results

  • White Papers // Jan 2013

    Optimal 4G OFDMA Dynamic Subcarrier and Power Auction-Based Allocation Towards H.264 Scalable Video Transmission

    In this paper, authors presented a price maximization scheme for optimal Orthogonal Frequency Division for Multiple Access (OFDMA) subcarrier allocation for wireless video unicast/multicast scenarios. They formulate a pricing based video utility function for H.264 based wireless scalable video streaming, thereby achieving a trade-off between price and QoS fairness. These...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Apr 2013

    Dynamic Parallel TCP for Scalable Video Streaming Over MIMO Wireless Networks

    Video streaming over wireless (networks) has gained popularity in recent times with the development of 3G and 4G mobile networks. The demand and market for video based services is expected to grow substantially in the future. When UDP is used for video streaming, the inherent unreliability of UDP frequently results...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Feb 2013

    Optimal Power Allocation Auction for H.264/SVC Coded Wireless Video Transmission

    In this paper, the authors propose optimal power allocation schemes for quality maximization of the transmitted video streams in wireless multicast communication scenarios. For this purpose they employ parametric scalable video models, which model the rate and quality of the scalable streams as a function of the quantization parameter and...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Nov 2012

    Robust Total Variation and Sphere Decoding Based Image Reconstruction for Wireless Sensor Networks

    In this paper, the authors propose a novel scheme for low-complexity robust recovery in the context of image transmission over Rayleigh fading wireless sensor links. The proposed scheme employs an optimal Maximum-Likelihood (ML) scheme for transmit vector detection in conjunction with a total variation regularization factor towards sparsity of the...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Oct 2012

    DWT Based Optimal Power Allocation Schemes for Scalable Video Transmission in OFDM Based Cognitive Radio Systems

    In this paper, the authors propose and investigate the performance of optimal power loading algorithms towards scalable video transmission over an Orthogonal Frequency Division Multiplexing (OFDM) based Cognitive Radio (CR) system. The proposed power allocation scheme minimizes the overall video distortion while restricting secondary user interference. For this purpose, they...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Oct 2012

    Auction Based Optimal Subcarrier Allocation for H.264 Scalable Video Transmission in 4G OFDMA Systems

    In this paper, the authors present a price maximization scheme for optimal OFDMA subcarrier allocation for wireless video unicast/multicast scenarios. They formulate a pricing based video utility function for H.264 based wireless scalable video streaming, thereby achieving a trade-off between price and QoS fairness. These parametric models for scalable video...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Aug 2006

    Network Monitoring Tool to Identify Malware Infected Computers

    These days most of the Organizational Networks are facing a critical problem. Lately there has been a lot of increase in Malwares such as worms, adwares, spywares etc., which get installed on the user's PC and generate Network and Internet traffic without the user's knowledge i.e. in the background. As...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Mar 2009

    Low Cost Secure Transaction Model for Financial Services

    Installing a financial service outlet (e.g. Automated Teller Machine (ATM)) is an expensive affair due to the need of dedicated network connectivity. In the existing model, the users are forced to trust a service outlet to be authentic. A spoofed outlet can collect the account information and use it in...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jul 2009

    Accessing Files From Public Computers in a Trusted Manner

    Governments, military, different private organizations, financial institutions and hospitals have great deal of confidential information which is stored on computers. All these organizations want this information to be secure and accessible from any part of the world. For data security, one can use any of the encrypting file systems like...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jan 2010

    Surveillance Video Mining

    This paper approaches the problem of surveillance event characterization at two levels. First, the information characterizable at the single camera image-plane level, where one uses a set of occlusion primitives to define a set of time-varying predicates on heterogeneous objects moving in unknown environments. After learning the scene background online,...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jan 2009

    Intrusion Detection and Tracking With Pan-Tilt Cameras

    The use of autonomous pan-tilt cameras as opposed to static cameras can dramatically enhance the range and effectiveness of surveillance systems, but effective tracking in such pan-tilt scenarios remains a challenge. Existing approaches for constructing mosaiced background models require accurate camera motion parameters, and online updates for the background model...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jul 2009

    TransCrypt: An Enterprise Encrypting File System Over NFS

    Many organizations have great deal of confidential information which is stored on computers. Such information is desired to be kept securely yet giving a convenience of accessibility from any part of the world. For data security, one can use an encrypting file system such as eCryptfs, dmCrypt, File Vault. However...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jan 2011

    Rural Telephony: A Socio-Economic Case Study

    Information and Communication Technology (ICT) has the potential to bring in development to rural areas in the third world. Any deployment of technology however should be backed by a positive economic activity to be sustainable. This paper reports on experience with the economics, as well as the social aspects of...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Feb 2010

    Approximate Shortest Paths Avoiding a Failed Vertex : Optimal Size Data Structures for Unweighted Graphs

    The shortest paths problem is a classical and well studied algorithmic problem of computer science. This problem requires processing of a given graph G = (V,E) on n = |V | vertices and m = |E| edges to compute a data structure using which shortest path or distance between any...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Sep 2010

    An Application-Oriented Model for Wireless Sensor Networks Integrated With Telecom Infra

    This paper aims to propose a significant way of remote access and real time monitoring of a particular geographic area by integrating wireless sensor clouds with existing Telecom infrastructure and applications built around them through a gateway. This utility is very potent for environment monitoring in harsh and inaccessible places...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Apr 2011

    Security of Prime Field Pairing Cryptoprocessor Against Differential Power Attack

    This paper deals with the differential power attack on a pairing cryptoprocessor. The cryptoprocessor is designed for pairing computations on elliptic curves defined over finite fields with large prime characteristic. The paper pinpoints the vulnerabilities of such pairing computations against side-channel attacks. By exploiting the power consumptions, the paper experimentally...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Sep 2009

    Dynamically Generated Interfaces in XML Based Architecture

    Providing on-line services on the Internet will require the definition of flexible interfaces that are capable of adapting to the user's characteristics. This is all the more important in the context of medical applications like home monitoring, where no two patients have the same medical profile and yet, the same...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Aug 2010

    Multi-Algorithmic Iris Authentication System

    The paper proposes a novel technique for iris recognition using texture and phase features. Texture features are extracted on the normalized iris strip using Haar Wavelet while phase features are obtained using LOG Gabor Wavelet. The matching scores generated from individual modules are combined using sum of score technique. The...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jan 2011

    A Routing Algorithm for Multi-Hop Mobile Ad-Hoc Networks Using Weighted Delaunay Triangulation

    A multi-hop mobile ad-hoc network is a collection of wireless mobile hosts forming a temporary network without the aid of any centralized administration or standard support services. In such an environment, it is necessary for each mobile node to act both as a host and as router. Such a network...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jan 2011

    Feasibility Study of Spatial Reuse in an 802.11 Access Network

    Despite a decade and a half of communication revolution, much of the rural population in developing countries is yet to see its benefits. The underlying reason for this is that communication technology (wired and cellular) is value-priced for western markets. Thus these technologies have found widespread deployment in metropolitan pockets...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jan 2011

    Revisiting MAC Design for an 802.11 Based Mesh Network

    This paper deals with an 802.11-based access network for rural villages. 802.11's CSMA/CA MAC is known to perform poorly in mesh networks. In this paper, the authors present the design of a novel MAC suited to a mesh network with outdoor, long-distance, point-to-point links. Multi-hop 802.11 networks are a topic...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Feb 2012

    On the Optimality of Lattices for the Coppersmith Technique

    The authors investigate the Coppersmith technique for finding solutions of a univariate modular equation within a range given by range parameter U. This technique converts a given equation to an algebraic equation via a lattice reduction algorithm, and the choice of the lattice is crucial for the performance of the...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Feb 2010

    Feature Level Fusion of Biometrics Cues: Human Identification With Doddington's Caricature

    This paper presents a multimodal biometric system of fingerprint and ear biometrics. Scale Invariant Feature Transform (SIFT) descriptor based feature sets extracted from fingerprint and ear are fused. The fused set is encoded by K-medoids partitioning approach with less number of feature points in the set. K-medoids partition the whole...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Mar 2009

    Feature Level Clustering of Large Biometric Database

    This paper proposes an efficient technique for partitioning large biometric database during identification. In this technique feature vector which comprises of global and local descriptors extracted from offline signature are used by fuzzy clustering technique to partition the database. As biometric features posses no natural order of sorting, thus it...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Jan 2012

    WR Based Semi-Blind Channel Estimation for Frequency-Selective MIMO MC-CDMA Systems

    In this paper, the authors propose a novel Whitening-Rotation (WR) based Semi-Blind (SB) scheme for frequency-selective channel estimation in Multiple-Input Multiple-Output (MIMO) Multi-Carrier (MC) CDMA systems. This scheme is based on a low complexity Multi-path Multi-carrier Decorrelator (MMD) receiver structure developed for the MIMO MC-CDMA system. It is shown that...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Sep 2011

    VCG Auction Based Optimal Allocation for Scalable Video Communication in 4G WiMAX

    In this paper, the authors propose a novel application of the Vickrey-Clarke-Groves (VCG) auction based time-frequency resource allocation for H.264 SVC based scalable video transmission in 4G wireless systems. The net transmitted video quality corresponding to the given bit-rate constrained wireless system can be maximized by optimally allocating the OFDMA...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Sep 2011

    Multi-Sensor Spatio-Temporal Vector Prediction History Tree (V-PHT) Model for Error Correction in Wireless Sensor Networks

    Wireless Sensor Networks (WSNs) have gained rapid popularity due to their deployment for critical applications such as defense, health care, agriculture, weather and tsunami monitoring etc. However, such sensor networks are fundamentally constrained by the data errors arising due to the harsh power constrained sensing environment. In this paper, the...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Nov 2011

    Optimal Classifier Based Spectrum Sensing in Cognitive Radio Wireless Systems

    In this paper, the authors present and investigate the performance of novel classification schemes for spectrum sensing in cooperative Multiple-Input Multiple-Output (MIMO) wireless Cognitive Radio (CR) networks. In this context, they consider several optimal classification schemes such as Support Vector Classifiers (SVC), Logistic Regression (LR) and Quadratic Discrimination (QD) for...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Nov 2011

    Bayesian Data and Channel Joint Maximum-Likelihood Based Error Correction in Wireless Sensor Networks

    The authors propose a novel Bayesian error correction algorithm based on joint channel and data Maximal-Likelihood (ML) detection in Wireless Sensor Networks (WSN). The proposed algorithm employs the temporal correlation of the narrowband sensor data in conjunction with the Channel State Information (CSI) for detection and error correction of the...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Nov 2011

    Utility Based Video Scheduling for Quality Maximization in 4G WiMAX Wireless Networks

    In this paper, the authors propose a novel utility based algorithm for dynamic frame scheduling of a scalable video stream for video transmission over a 4G OFDMA wireless network. They consider the GOP structure of a temporally scalable video sequence and derive a scheme to compute the average utility and...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Nov 2011

    Rate Partitioning for Optimal Quantization Parameter Selection in H.264 (SVC) Based 4G Broadcast/Multicast Wireless Video Communication

    In this paper, the authors present a novel scheme for video quality maximization in the context of H.264 Scalable Video Coding (SVC) based 4G wireless broadcast and multicast video transmission. A typical wireless multicast group comprises of multimedia clients with varying wireless link qualities. Thus, the conventional Fair Rate Static...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Aug 2011

    Hierarchical DWT Based Optimal Diversity Power Allocation for Video Transmission in MIMO Wireless Systems With Quantized Feedback

    In this paper, the authors propose novel algorithms for singular mode diversity order based optimal power allocation for video transmission in Multiple-Input Multiple-Output (MIMO) wireless systems. They motivate a Discrete Wavelet Transform (DWT) and Hierarchical Block Motion estimation Algorithm (HBMA) based spatio-temporal video decomposition that is naturally suited to the...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Sep 2011

    Optimal Subcarrier Allocation for H.264 Based Scalable Video Transmission in 4G OFDMA Systems

    In this paper, the authors present a novel scheme for optimal OFDMA subcarrier allocation towards video quality maximization employing the paradigm of H.264 based Scalable Video Coding (SVC). They deduce the rate and quality model parameters for video characterization of the SVC extension of the H.264/AVC and propose an optimization...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Dec 2011

    Hierarchical DWT Based Optimal Diversity Power Allocation for Video Transmission in 4G OFDMA Wireless Systems

    In this paper, the authors propose novel algorithms for optimal subcarrier power allocation towards video transmission in Orthogonal Frequency Division Multiple Access (OFDMA) based 4G wireless systems. A unique feature of the proposed schemes is that they employ diversity dependent subcarrier power distribution relying on a Discrete Wavelet Transform (DWT)...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Oct 2010

    Optimal Frame Rate Allocation for Unicast and Multicast Wireless Video Communication

    In this paper, the authors consider a paradigm for sum perceptual quality maximization in the context of unicast and multicast video transmission to heterogeneous multimedia wireless clients. The multimedia server is constrained by the processing overheads required for tasks such as video encoding, bit-stream extraction, packetisation, etc. They demonstrate that...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Dec 2010

    HS-EM Based Blind MIMO Channel Estimation for Dynamically Scalable JPEG Transmission

    An Expectation-Maximization (EM) based scheme is presented in the context of compressed image transmission for blind Multiple-Input Multiple-Output (MIMO) wireless channel estimation. This cross-layer content-aware algorithm employs a combination of Hard and Soft (HS) symbol information from the header blocks of the scalable JPEG compressed image to estimate the complex...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Mar 2012

    Fractional Timing Offset and Channel Estimation for MIMO OFDM Systems Over Flat Fading Channels

    This paper addresses the problem of fractional timing offset and channel estimation in Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO OFDM) systems. The estimators have been derived assuming a flat fading channel and using the maximum likelihood criterion. Closed form Cramer Rao Bound (CRB) expressions for fractional timing...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Dec 2010

    Fractional Timing Offset and Channel Estimation in OFDM Systems Over Flat Fading Channels

    This paper addresses the estimation of fractional timing offset and channel response in Orthogonal Frequency Division Multiplexing (OFDM) systems. Timing offset and channel estimator is derived based on maximum likelihood criterion. Closed form Cramer Rao Bound (CRB) expressions for fractional timing offset and channel response are derived. They consider flat...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Dec 2010

    A 6 mW Low Noise Amplifier for 3.1-10.6 GHz UWB Application

    This paper presents a single stage Low-Noise Amplifier (LNA) using cascode topology for low-power UWB applications. Resistive feedback is used to obtain large bandwidth. The LNA achieves peak gain of 11.8 dB and noise figure varying from1.72 - 3.62 dB within the band of 3.1 - 10.6 GHz. The LNA...

    Provided By Indian Institute of Technology Kanpur

  • White Papers // Dec 2010

    Significance of the LP-MVDR Spectral Ratio Method in Whisper Detection

    A new spectral ratio method is proposed in this paper for detecting whispered segments within a normally phonated speech stream. The method is based on computing the ratio of the Linear Prediction(LP) spectrum to the Minimum Variance Distortion less Response (MVDR) spectrum. Both the linear prediction method and the LP...

    Provided By Indian Institute of Technology Kanpur