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題 名 | Design of Intelligent GPS Receivers in Kinematic Environments=應用於動態環境之智慧型全球定位系統接收機設計 |
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作 者 | 毛偉龍; | 書刊名 | 明志學報 |
卷 期 | 36:2 2005.01[民94.01] |
頁 次 | 頁33-45 |
分類號 | 440.98 |
關鍵詞 | 模糊推論控制器; 全球定位系統接收機; 週期滑脫; 數位鎖相迴路; Fuzzy inference system controller; FISC; GPS receiver; Cycle slips; Digital frequency phase-locked loop; |
語 文 | 英文(English) |
中文摘要 | 全球定位系統應用中,利用載波相位的可提供高精確度的測量。針對接收機設計,窄雜訊頻寬可減少因熱雜訊所造成之相位顫抖,但相對的降低信號追蹤能力並發生週期滑脫。本篇論文提出應用於快速動態環境之智慧型接收機架構。我們設計一智慧型相位誤差偵測器來切換接收機的於模糊推論控制模式與標準模式。以模糊邏輯與類神經模糊的兩種演算法來實現控制器。同時一個新的接收機設計程序也被提出。模擬的結果可知所提出的架構可達成較快的安定時間與較寬的拉入範圍,同時可有效的避免週期滑脫的發生。 |
英文摘要 | Carrier phase measurement is essential for high accuracy kinematic positioning in mobile global position system (GPS) application. For GPS receiver design, a narrow noise bandwidth is desired to decrease phase jitter due to thermal noise. On the other hand, it will deteriorate the capability of tracking loop and result in cycle slips. Based on narrow bandwithdth criterion, a novel intelligent GPS receiver is proposed for solving the carrier phase tracking problem in the presence of high dynamic environments. In order to maintain lock on diversity of phase signals, a rule-based intelligent phase error estimator (IPEE) is deverloped in carrier loop to switch between two modes, i.e. fuzzy inference system control (FISC) and normal operation (NOPR) modes. Two kinds of kinds of FISC approaches, namely fuzzy logic control (FLC) and adaptive neuro-fuzzy control (ANFC) methods with simplicity and easy realization properties, are designed to perform rapid and accurate control of digital frequency phase locked loop (FPLL). A new design procedure for kinematic GPS receiver development is also presented. The computer results show that the FISC-based receiver achieves faster settling time and wider pull-in range than the conventional tracking loops while preventing the occurrence of cycle slips. |
本系統中英文摘要資訊取自各篇刊載內容。