Browsing PhD Theses by Title
Now showing items 1-20 of 87
-
3D shape deformations : a lie group based approach
(Dhirubhai Ambani Institute of Information and Communication Technology, 2020)3D shapes are ubiquitous in many fundamental tasks of computer graphics and geometry processing. For many applications, new shapes have to be generated from the existing ones, for which it it imperative to understand and ... -
Adaptive channel estimation and loading for OFDM based two-way relay systems
(Dhirubhai Ambani Institute of Information and Communication Technology, 2013)In this thesis we introduce a low complexity Recursive Least Square (RLS) based Orthogonal Frequency Division Multiplexing (OFDM) channel estimation for two-way relay system. Using the estimate of the channel, a bit and ... -
Adaptive techniques to improve the efficiency of GaN based SSPAs (up to C Band) for geo synchronous satellites
(Dhirubhai Ambani Institute of Information and Communication Technology, 2018)In this thesis, various adaptive techniques to improve the efficiency of Solid State Power Amplifier (SSPA) for Geo Synchronous Satellite are presented. The Microwave Power Amplifiers (MPAs) being the most important ... -
Algebraic approach to Nash equilibria for finite normal form games
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)In this work we consider methods for computing Nash equilibria of finite normal form games that emphasize use of polynomial algebra. Nash equilibria of a game can be characterized as solutions to a system of polynomial ... -
Auditory representation learning
(Dhirubhai Ambani Institute of Information and Communication Technology, 2018)Representation learning (RL) or feature learning has a huge impact in the field of signal processing applications. The goal of the RL approaches is to learn the meaningful representation directly from the data that can be ... -
Bandwidth considerations in miniaturized rectangular dielectric resonator antennas: experimental validation
(Dhirubhai Ambani Institute of Information and Communication Technology, 2016)In this thesis, an issue of bandwidth is considered in a rectangular dielectric resonator antenna (RDRA). Two techniques (merging of modes and stacking) of bandwidth im- provement are introduced with miniaturized resonator. ... -
Between insularity and cosmopolitanism: a study on the relation between Urban Space and Urban Identity in modern Baroda
(Dhirubhai Ambani Institute of Information and Communication Technology, 2018)Located in the State of Gujarat, the city of Baroda or Vadodara is described a Sanskarnagri, the state's cultural capital and a cosmopolitan urban space. This thesis challenges this image of Vadodara and its current city ... -
Broadband microstrip antennas with switchable polarizations
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)Microstrip antenna consists of a patch of metallization on grounded substrate. These are low profile, lightweight antennas, most suitable for aerospace and mobile application. They are replacing many conventional antennas ... -
Channel estimation and soft OSIC detection in coherent MIMO-OFDM systems using QRD techniques(802.16m)
(Dhirubhai Ambani Institute of Information and Communication Technology, 2013)Next generation mobile systems will use multiple antennas at the transmitter and receiver to achieve higher capacity and diversity gain at high speeds. By transmitting through multiple transmitting and receiving antennas, ... -
CLAPDAWN: cross layer architecture for protocol design in a wireless network
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)Architecture plays a key role in overall success of the network protocol stack. It is essential to have robust architecture for the complex system having multiple cross protocol interactions. In the literature more emphasis ... -
Classification Techniques of PolSAR Images
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)Over the years, optical remote sensing technology has restricted the ability to capture images during harsh weather settings and at night time. However, Synthetic Aperture Radar (SAR) is independent of solar illumination ... -
Compact Circularly Polarized Tri-, Dual- and Single-Band Dielectric Resonator Antennas
(Dhirubhai Ambani Institute of Information and Communication Technology, 2021)The Dielectric Resonator Antennas (DRAs) have received wide attention due to low loss, high radiation efficiency, small size, wider bandwidth and simple feed network as compared to the microstrip antennas. Microstrip ... -
Compressive sampling architecture for wideband communication
(Dhirubhai Ambani Institute of Information and Communication Technology, 2020)This dissertation proposes a novel Compressive Sampling (CS) scheme for Sub-Nyquist Spectrum Sensing (SNSS) of spectrally sparse wideband signals. A novelty of our proposed SNSS scheme resides in the analog front-end. We ... -
Computational and Data Driven Approaches for Investigation of Microwave-Plasma Interaction
(Dhirubhai Ambani Institute of Information and Communication Technology, 2023)Microwave-plasma interaction and High power microwave (HPM)breakdown involving plasma formation have been studied theoreticallyas well as experimentally since the 1950s for a wide variety of applications.Microwave plasma ... -
Coordinated adaptive power management (CAPM) technique for sensor network nodes
(Dhirubhai Ambani Institute of Information and Communication Technology, 2013)Small size of wireless sensor nodes limit the size of the battery supported on it which directly limits the capacity of the battery and lifetime of the sensor nodes. Though energy scavenging is one of the solutions, it is ... -
Copy-Move Tampering: Some New Approaches of the Detection and Localization in a Digital Image
(Dhirubhai Ambani Institute of Information and Communication Technology, 2022)Images speak. They tell us stories. Digital images carry plethora of information. The availability of cost-effective digital camera-enabled devices has made capturing images a child’s play. Statistics witnesses that the ... -
Crying for a reason : a signal processing based approach for infant cry analysis and classification
(Dhirubhai Ambani Institute of Information and Communication Technology, 2016)The present work in this thesis is directed towards understanding the reason of crying of an infant using signal processing approaches. Infant cry analysis and classification is a non-invasive method of analyzing the infant ... -
Dense disparity estimation using stereo images
(Dhirubhai Ambani Institute of Information and Communication Technology, 2017)"“Stereo vision” refers to the ability to infer information on the three-dimensional (3D) structure and distance/depth of a scene using two images captured from different view-points. It imitates one of the tasks performed ... -
Desertification characterization using predictive soil modelling and pattern recognition
(Dhirubhai Ambani Institute of Information and Communication Technology, 2023)This thesis presents a hierarchical methodology for land degradation mapping,land use land cover classification, degradation process identification and map-ping using multispectral LISS-3 images. The study aims to demonstrate ... -
Design and analysis of distortion reduction techniques in direct conversion receiver
(Dhirubhai Ambani Institute of Information and Communication Technology, 2017)Direct-conversion is alternative wireless receiver architecture to the well-established super heterodyne architecture. Direct-conversion receiver (DCR) can offer highly integrated, low-power and low-cost hardware Solutions ...