Browsing M Tech Dissertations by Subject "Wireless communication systems"
Now showing items 21-40 of 54
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Energy conserving voidless coverage in wireless ad-hoc sensor networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2005)For many sensor network applications such as intrusion detection and military surveillance, it is necessary to provide full sensing coverage to a security-sensitive area while at the same time minimizing energy consumption ... -
Energy efficient data gathering protocol for wireless sensor network
(Dhirubhai Ambani Institute of Information and Communication Technology, 2008)Wireless Sensor Network is made up of hundreds and thousands of miniature electronic devices called node, which have sensors built on them. Functionality of a sensor is entirely application dependent. They can perform a ... -
Executable specification design and simulation of OFDM based communication system
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)The communication system using the OFDM principle is today one of the most important application in communication field. This system has various applications from broadband to 3G and digital TV to Radio LANs. This master’s ... -
Exploring small world effect in ad hoc network
(Dhirubhai Ambani Institute of Information and Communication Technology, 2008)Small world is a highly clustered i.e., a densely and fully connected network, with low degree of separation between the nodes. These networks have inherited the high clustering property of regular networks and low average ... -
FIR filter for high speed 60 GHz wireless communications.
(Dhirubhai Ambani Institute of Information and Communication Technology, 2013)In this thesis report the design and implementation of the FIR filter at 5 GS/s presented. IEEE 802.15.3c standard declared unlicensed band from 57 to 66 GHz. This 60 GHz wireless communication transmitter uses interpolator ... -
FPGA implementation of direct sequence spread spectrum techniques
(Dhirubhai Ambani Institute of Information and Communication Technology, 2008)This work presents the performance, noise analysis and FPGA implementation of Direct Sequence Spread Spectrum technique. Performance of signal increases as increasing parity bits in Hamming code algorithm. Increasing parity ... -
FPGA implementation of multiband and multimode modem for software defined radio (SDR)
(Dhirubhai Ambani Institute of Information and Communication Technology, 2012)Now a days Software Defined Radio(SDR) is becoming popular for wireless communication because of it’s flexibility to change as per requirement through software. The work presented here describes the different methods of ... -
Game theory based strategies for cooperation in ad hoc wireless networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)In self-organized ad-hoc wireless networks, nodes belong to different authorities, pursue different goals, have constrains like energy; therefore, cooperation among them cannot be taken for granted. Non cooperation of nodes ... -
Hardware implementation of multiband and multimode modem for software defined radio/ cognitive radio
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)Present day programmable hardware and SDR (Software Defined Radio) have enabled radio processing to switch from analog to digital. The work presented here describes a method of designing a multiband & multimode modulator ... -
Identifying small world network properties in ad-hoc networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2009)Small World Network is a densely connected network with low degree of separation. These types of networks have high clustering property like regular network as well as have low average path length like random network. Thus, ... -
Incorporation of mobility model of nodes in zone routing protocol for mobile ad hoc wireless networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2004)Ad Hoc wireless networks are characterized by dynamically changing network topology due to relative motion of the nodes. This leads to the exchange of large number of control packets between the nodes to maintain the network ... -
Investigation on multi-band fractal antennas for satellite applications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)Remote sensing is a very important application of satellite communication. In remote sensing applications, multiple frequencies are utilized. Use of different antennas for different frequencies is a complex task and so use ... -
Localization of target in wireless sensor networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2005)Advances in hardware and wireless network technology have made it possible to build and deploy dense ad-hoc wireless sensor networks of nodes collecting and disseminating information. One problem that arises in ad-hoc ... -
Low noise amplifier design at 2 GHz
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)Low Noise Amplifier (LNA) is one of the most important building blocks of any wireless receiver. In this an attempt has been made to study two types of LNA designs. The first design is the conventional which consists of ... -
Mobility aware MANET routing protocol using cross layer design
(Dhirubhai Ambani Institute of Information and Communication Technology, 2006)Mobile Adhoc Network (MANET) is a dynamic network with time varying topology and time varying network resources. Due to the error-prone wireless channel and high mobility, traditional protocols of wired networks cannot be ... -
Model based channel shortening technique for IEEE 802.11a OFDM system
(Dhirubhai Ambani Institute of Information and Communication Technology, 2007)Channel shortening tehniques for IEEE802.11a OFDM system are studied. Their performance is evaluated for various standard channel models. A model based channel shortening technique is presented, which reduces the computational ... -
Modeling MANETs using queuing networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2007)Mobile Ad Hoc Networks (MANETs) are becoming an attractive solution to the services that require flexible establishment, dynamic and low cost wireless connectivity. Since nodes are mobile, routing results vary significantly ... -
Multi band fractal antenna for satellite application
(Dhirubhai Ambani Institute of Information and Communication Technology, 2008)Fractal Antenna is the current topic for the research engineering because Fractal Technology allow us to design miniature antennas and integrate multiple band in single device. This antenna is a type of Micro strip antenna ... -
Optical wireless sensor network design for a conducting chamber
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)Now a day’s majority of the wireless sensor networks (WSNs) are based on Radio Frequency (RF) communication technology. But RF when used in an environment like that of metallic, conducting chamber exhibits large amount of ... -
Packet forwarding strategies for cooperation enforcement in mobile wireless ad hoc networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)In self-organized ad hoc networks, all networking functions rely on the contri- bution of the relay nodes. Nodes have to forward packets for each other in order to enable multi-hop communication. In recent years, researchers ...