Browsing M Tech Dissertations by Subject "Wireless communication systems"
Now showing items 1-20 of 54
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A 0.18µ low power dual-mode transceiver front-end design for high speed bluetooth systems
(Dhirubhai Ambani Institute of Information and Communication Technology, 2006)Today’s market trend is to possess a single multi-purpose, multi-functional personal device for various wireless personal area network (WPAN) applications. So it raises a great demand to develop multi-mode/multi-standard ... -
Ant colony optimization in routing algorithms of mobile ad hoc networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)The study on performance of On-demand Ant Routing Algorithm for Mobile Ad Hoc Network is done. An ant routing algorithm based on swarm intelligence and especially on Ant Colony Optimization (ACO). It describes a noval on ... -
Application of compressive sensing to tow-way relay channel estimation
(Dhirubhai Ambani Institute of Information and Communication Technology, 2012)An Amplify and Forward Two-Way Relay Network is one where two nodes transmit data to each other via an intermediate relay. The relay amplifies the superimposed data from both the nodes before sending it to both the nodes. ... -
Application of network coding in wireless sensor and relay based ad hoc networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2015)Network Coding (NC) is a new area which brings radical change in the way we treat information flow in networks. NC considered being a layer 3 operation has been shown to improve the throughput of wired networks especially ... -
Bidding strategies for dynamic spectrum allocation
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)Dynamic Spectrum Allocation is the process of assigning spectrum licenses in terms of the chunks of the spectrum band to the Wireless Service Providers (WSPs). This allocation assignment is being done as per the WSPs' ... -
Broadband spectrum estimation using cascaded integrator comb filter
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)Spectrum estimation using different type of lters is a broad area of research nowadays. In this work, Cascaded Integrator Comb (CIC) lter based narrowband spectrum estimation and CIC band pass lter is presented. Then the ... -
Cache performance evaluation in DSR protocol through cross-layering for mobile ad hoc networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)Wireless mobile ad-hoc networks are being actively studied by many researchers these days. These networks are suitable to be used in various situations because of (i) their infrastructure-less property and (ii) the mobility ... -
Channel estimation and tracking OFDM and MIMO systems
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)In this thesis, To estimate and track the slow Time varying channels in OFDM and MIMO systems. In first part: we have used a two-dimensional recursive least square adaptive channel estimation technique is used. In orthogonal ... -
Channel estimation in OFDM systems
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)Orthogonal frequency division multiplexing (OFDM) is not a new concept, but its receiver design has constant improvement. OFDM uses available spectrum efficiently and the system provides high data rates. Many standards ... -
Channel quality prediction and localization
(Dhirubhai Ambani Institute of Information and Communication Technology, 2007)In this thesis we focus on two problems, Channel Quality Prediction and Localization in wireless network. In High-Speed Downlink Packet Access (HSDPA) architecture of Universal Mobile Telecommunications Services (UMTS), ... -
Comparative study between exponential back off and dynamic waiting strategies for medium access in wireless ad hoc networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)IEEE 802.11 DCF (IEEE 802.11 Distributed Coordination Function) is widely used MAC protocol for wireless channel access. Although it is developed for single hop networks where all nodes are in the same radio range, it can ... -
Cooperation enforcement mechanisms in wireless adhoc networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)Wireless adhoc networks are autonomous, infrastrutureless networks where there are no dedicated routers or base stations and nodes are expected to cooperate in Wireless performing routing duties to keep network connected. ... -
Design and implementation of 128-point fixed point streaming FFT processor for OFDM based communication system
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)Fast Fourier Transform (FFT) processors are today one of the most important blocks in communication systems. They are used in every communication system from broadband to 3G and digital TV to Radio LANs. This master’s ... -
Design issues in direct conversion receiver
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)The wireless system is being rapidly proliferated in our life. The growing of capacity in wireless communication requires a new type of wireless communication method which does not affect current work on circuits and systems ... -
Design of a novel high linearity down conversion mixer for GSM band applications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2012)Double balanced Gilbert cell mixer (GCM) is the mostly used kind of mixer as it provides conversion gain and has port to port isolation. This mixer lacks in linearity and noise figure which are to be taken care in designing ... -
Design of CDMA transmitter and three finger rake receiver
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)As cellular wireless communication becomes a worldwide communication standard, it is important in studying how data communications happens in a cellular system. In this Thesis work CDMA transmitter and receiver have been ... -
Design of digital accelerometer based seismic sensor node
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)The aim of Design of Digital Accelerometer based Seismic Sensor Node is to propose a design for wireless sensor network for exploring the sub-surface region of the moon by studying the seismic waves generated over there. ... -
Design of multi-standard RF front end receiver using novel low IF topology
(Dhirubhai Ambani Institute of Information and Communication Technology, 2008)This thesis presents the multi-standard receiver architecture and the corresponding RF front-end design supporting Bluetooth and IEEE 802.11a WLAN standards. To maximize the level of component share in the proposed ... -
Distributed clustering for heterogeneous wireless sensor network in data gathering applications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2005)Wireless Sensor networks have revolutionized the paradigm of gathering and processing data in diverse environment such as, wildlife area, kindergarten or agriculture farm. The nodes in these networks usually have a very ... -
Effect of location inaccuracy on deterministic coverage and connectivity protocol in wireless sensor network
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)Sensor networks have a wide range of potential, practical and useful applications. Energy saving is one critical issue for sensor networks since most sensors are equipped with non rechargeable batteries that have limited ...