Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 70 for “"Coverage Area"”.
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A land mobile radio coverage area prediction model for New Zealand
… in the development of a nationwide land mobile coverage area prediction model for New Zealand. The most suitable approach is shown to be a computer-based method which includes corrections for both environmental and terrain features. Extensive field trials performed in Auckland at 76 and 465MHz …
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Assessment of the adequacy of USCGS data tapes for transmitter coverage area calculations
… the automated prediction of radio transmitter coverage area. The objective was to assess the adequacy of the USCGS database to support radio-frequency path-loss and terrain clearance calculations. The assessment was made by investigating the basic features of the tapes and of the coverage …
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A Coverage Area Estimation Model for Interference-Limited Non-Line-of-Sight Point-to-Multipoint Fixed Broadband Wireless Communication Systems
… technology have been limited in scope to service areas where transceivers can communicate with their base stations, unimpeded by trees, buildings and other obstructions. This limitation has serious consequences in that the system can deliver only 50% to 70% coverage within a given cell radius, …
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A Location-aided Decision Algorithm for Handoff Across Heterogeneous Wireless Overlay Networks
… level of QoS. Deploying smaller cells in areas of higher mobility (e.g., campuses, subway stations, city blocks, malls, etc.) results in the user only spending a short period of time in each cell, which significantly increases the rate of handoff. If the user does not spend sufficient time …
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The Design and Analysis of a Wireless LAN Relayed Frame Protocol Extension
… station must always be within an access point’s coverage area. If a station moves outside of that area, and if it is unable to locate another base station within its range to perform a handover of communication connectivity responsibility, then it will ex perience a disruption in network services …
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Virtual pan-tilt-zoom for a wide-area-video surveillance system
… to a high pixel-count image representing a wide coverage area, and it would enable a user to "virtually" pan, tilt, and zoom around the coverage area by reading out only the relevant image data associated with a Region of Interest that is dynamically defined by the user. This paper will examine …
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Enhancing Security in 802.11 and 802.1 X Networks with Intrusion Detection
… and low cost of 802.11-based Wireless Local Area Networks (WLANs) complemented with 802.1 X authentication has led to widespread deployment in the consumer, industrial and military sectors. The combination of wireless signals radiating further than the intended coverage area, flaws in …
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A distributed approach to underwater acoustic communications
… mobile nodes dispersed across a relatively wide coverage area is presented. Nodes are dynamically clustered in a distributed manner based on the estimated position of one-hop neighbor nodes within a shallow water environment. The spatial dynamic cellular clustering scheme allows scalable …
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Underground Wireless Mesh Communication Infrastructure Design Prediction and Optimization
… the measure of a communication system is the coverage area it can provide at a quality that ensures a miner can communicate with other miners in and out of the mine during normal and emergency operations. The coverage area of a wireless mesh communication system can be calculated using the …
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Evaluation and Simulation of Wireless Communication and Tracking in Underground Mining Applications
… the measure of a communication system is the coverage area it can provide at a quality that ensures a miner can communicate with other miners in and out of the mine during normal and emergency operations. The coverage area of a wireless mesh communication system can be calculated using the …
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Sensor development for estimation of biomass yield applied to Miscanthus Giganteus
… monitor estimates a total amount of biomass per coverage area in kg/m2 as a function of location. However, for herbaceous type crops such as MxG and switchgrass, directly measuring the biomass entering a harvester in the field is complicated and impractical. Therefore, a novel yield monitoring …
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Cooperative relaying in cellular networks for improving receiver diversity and cell radius
… only for improvement in capacity, data rates and coverage area but when considering an emergency service model, establishing reliable communication is the foremost requirement. With the inception of cooperative relaying technology, a novel wireless relaying method of sharing the terminal node …
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Spectrum sharing for multi-user massive MIMO networks
… results demonstrate that for a moderate-scale SN coverage area, both C-TDD and R-TDD approaches reveal almost comparable performance. Additionally, changes in the SN’s settings have a small effect on the total sum-rate of the PN when our proposed method is employed. Finally, for all tested values …
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Aircraft De-Icing System Using Thermal Conductive Fibers
… are addressed in terms of weight, flexibility, coverage area, safety and easiness of installation.</p>
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Wireless Intrusion Detection Sytem
… signals extending beyond the networks intended coverage area and the weaknesses in the standards result from the methods used for authorization and privacy. These insecurities restrict the use of wireless networks by entities that need a high level of security. This paper describes a Wireless …
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Energy Efficient Cluster Head Selection in Fixed Wireless Sensor Networks
… of energy cause sensors to die faster, lower coverage area and hence network death. In this paper we investigate techniques to maximize the network lifetime by selecting the most optimal cluster head. The proposed technique is in context of cluster-based wireless sensor networks, the others …
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Indoor Positioning Using Acoustic Pseudo-Noise Based Time Difference of Arrival
… speakers and microphones allowing for a large coverage area compared to highly directive ultrasonic transceivers. This paper experimentally evaluates the feasibility of the proposed IPS.</p>
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The development of time-dependent biofouling model for ships
… focussing on parameters such as size, coverage area and settlement pattern. Limited roughness functions data about barnacle fouling is available in the literature. Moreover, although a large number of the study has been carried out on the effect of roughness on the frictional …
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WideScatter:Toward Wide Area Battery-Free Wireless Sensor Networks
… To address this, we design the first wide-area and scalable backscatter network with multiple receivers(RX) and transmitters(TX) base units to communicate with battery-free sensor nodes. Our system circumvents the inherent limitations of backscatter systems - including the limited coverage …
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