碩士 / 國立成功大學 / 電機工程學系碩博士班 / 94 / In recent years, the GPS position technique has been widely used in commercial and portable devices. However, issues such as: Time-To-First-Fix (TTFF), power consumption, receiver stability and positioning accuracy remain to be fully investigated especially when signals are weak and subject to multipath. The thesis establishes a GPS receiver system based on open source software to analyze GPS baseband and navigation function. The thesis compares different acquisition methods and proposed a concept to reduce TTFF in processing of baseband signal. Furthermore, by modification of firmware, multipath signal can be detected, and then it helps suppress position error. In navigation processing, combination of receiver platform and pseudollite is to enhance stability and usability in urban canyons is investigated. A Kalman filter and a Particle filter which continuously update the best estimate of the user position is adding to navigation solution.
| Identifer | oai:union.ndltd.org:TW/094NCKU5442093 |
| Date | January 2006 |
| Creators | Zong-Jheng Hsiao, 蕭宗正 |
| Contributors | Jyh-Ching Juang, 莊智清 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 79 |
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