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We address the problem of sampling and reconstruction of two-dimensional (2-D) finite-rate-of-innovation (FRI) signals. We propose a three-channel sampling method for efficiently solving the problem. We consider the sampling of a stream of 2-D Dirac impulses and a sum of 2-D unit-step functions. We propose a 2-D causal exponential function as the sampling kernel. By causality in 2-D, we mean that...
Cloud computing provides many opportunities for enterprises by offering a range of computing services. In today's competitive environment, the service dynamism, elasticity, and choices offered by this highly scalable technology are too attractive for enterprises to ignore. These opportunities have opened up a new dimension of challenges by introducing a different type of trust scenario. Today, the...
Maintaining metadata consistency is a critical issue in designing a filesystem. Although satisfactory solutions are available for filesystems residing on magnetic disks, these solutions may not give adequate performance for filesystems residing on flash devices.
This paper describes application of principal component analysis (PCA) based data compression approaches for smart grid (SG) data storage. PCA methods are applied and compared for steady state operations and various system fault conditions. For signals with Gaussian noise data, a variant of PCA, labelled Iterative PCA (IPCA) is applied to simulated phasor data. The phasor data is simulated for IEEE...
The WDM network can be made flexible by use of wavelength converters that transform data on a wavelength to another wavelength. In this paper, we propose a technique to locate the optimal nodes with converter using genetic algorithm such that overall call blocking probability is minimized.
A Real-time emotion recognition system has potential applications especially for people suffering from autism to understand other people's emotions. A portable emotion recognizer will aid the autistic person to interact with the external world easily and helps them to understand facial emotions during their face to face communication. In this paper we have proposed a portable hardware efficient emotion...
The Quadrature Phase Shift Keying(QPSK) demodulator being presented here is designed based on Modified Costas loop technique to demodulate data rates upto 2 × 200Mbps. This paper highlights the design challenges involved in handling very high data rates in the analog domain with minimum cross-talk between I & Q chains and distortion in the demodulated signal. This paper also discusses about the...
In this paper we describe algorithms to classify environmental sounds with the aim of providing contextual information to devices such as hearing aids for optimum performance. We use signal sub-band energy to construct signal-dependent dictionary and matching pursuit algorithms to obtain a sparse representation of a signal. The coefficients of the sparse vector are used as weights to compute weighted...
Water leakage is a significant problem in both developing and developed countries causing water loss in water-distribution systems. Leakage causes economic loss in the form of wastage of water, damage to pipe networks and foundations of roads and buildings, and also poses risk to public health due to water contamination. The lost or unaccounted amount of water is typically 20–30 percent of production...
A suitable spatial filter was used to regulate the field at the single mode fiber input to get high transmission bandwidth in optical telecommunication networks. Numerical results are compared for the different types of spatial filters.
In this paper, two-dimensional (2D) defected ground structures (DGSs) are proposed in microstrip lines. The dumbbell structure is added as a unit-cell in a systematic manner in both horizontal and vertical directions to construct the 2D DGSs. The proposed scheme efficiently utilizes the ground area to achieve very low stop band frequencies. The EM simulation with experimental validation has been carried...
This paper describes an approach to learn far range depth data from a consumer grade RGB-D sensor. Raw sensor depth data is limited to the near field and is used as ground truth by a supervised learning algorithm for predicting far range depth. A multiple hypothesis regression function is fit using the near range ground truth. A linear least squares solution determines the parameters of each function...
Self managing, self healing Wireless Mesh Networks are deployed with the goal of providing seamless broadband connectivity to community users. In this paper, we present a routing metric for multiradio multichannel mesh networks that emphasizes on estimating node to node available bandwidth while capturing both interflow and intraflow interference. Moreover, the isotonic nature of the proposed Maximum...
The weighting of gradient sample arguments for the creation of descriptors of image regions is studied. The descriptors are interpreted as binned and weighted argument kernel density estimates and thereby their defining attributes are identified as the binning rules and the weighting. The weighting is further studied and four different weighting strategies are analyzed. The naive constant weighting...
Beamforming is being used in sensor networks to enhance its communication range.The sensors in networks use their own clock adjustment for distributed beamforming by coordinating with other sensors. For this, the Channel State Information(CSI) is required. Since the CSI is not available at the transmitter side, the Channel Phase tracking is used. A novel bisection based phase tracking method is proposed...
In this paper we examine the outage behavior of a coded cooperative system for independent, flat Nakagami-m fading channels. For this generalized form of fading statistics, we derive a closed form solution for outage probability constrained on instantaneous received power. We further find, analytically, the critical cooperation ratio at which total outage probability is minimum.
In this paper we propose a novel bottom spacer Bulk FinFET structure for logic applications suitable for system-on-chip (SOC) requirements. It solves the problem associated with the width quantization effect with optimized spacer height. Using well-calibrated device models and simulations, we have shown that Bulk FinFETs can be optimized with identical performances as that of SOI FinFETs. Optimized...
This paper presents the solar power based maximum boost Z-Source Inverter (ZSI) for Uninterruptible Power Supply (UPS) application. The concept of maximum boost Z-source can be applied to all dc-to-ac, ac-to-dc, ac-to-ac, and dc-to-dc power conversions. The maximum boost ZSI topology overcomes the limitations of conventional boost converter interfaced with Voltage Source Inverter (VSI). By this new...
Study and understanding of transistor and circuit variations caused by the fabrication process has become an important factor for integrated circuits as the device dimensions become smaller. Effects on clock frequency and IC performance caused by die-to-die and within-die variations have made it important to incorporate process variations in circuit simulators to correctly model the working of the...
There are several practical challenges in designing an ultra wideband (UWB) device for communication. From the physical layer perspective, signaling technique should be optimally designed to work in synergy with the underneath hardware to achieve maximum performance. In this paper we propose a new cost effective hardware architecture for UWB communication and propose a variant of pulse position modulation...
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