Improving Localization-Taking the Transmitter Voltageinto Account
| Autor: | Wei-Lun Yu, 余偉綸 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Localization is one of the most important topics in wireless sensor networks. Many applications, such as animal habitant observation and intruder detection, rely on an effective, prompt, and accurate localization technique. Among many localization techniques been developed to date, the range-based ones utilizing Radio Signal Strength Index (RSSI) as basis for distance measurement are appealing due to its simplicity and extensibility. However, the reading of RSSI is affected by many factors, such as Humidity and Temperature. As a result, the accuracy of the distance computed from RSSI as well as the localization built on top of it is reduced. In this thesis, we try to examine and quantify the impact of transmitter voltage to RSSI. Using the technique of linear aggression on the collected experimental RSSI readings, we are able to revise the existing equation for distance computation from RSSI to take the transmission voltage into account. From our experiments, we have found that the new equation improves the distance estimation accuracy by 50%~98% in most case. Keywords: ad-hoc sensor network, localization, voltage, RSSI |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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