臺灣博碩士論文加值系統

本論文旨在提出一用於調頻系統的服務跟隨方法，目的在能接收來自DAB調頻器輸出的音訊，並透過本論文所提之系統自動搜尋可用的空白頻道，重新以調頻訊號轉送出，並在穿越不同區域若有和電台使用相同頻道的現象時偵測出訊號變化，除本身的發射機改以其它可用的空白頻道轉送，利用無線電資訊系統讓接收音訊的車機型收音機亦能跟著轉換頻道。

This thesis is focus on a method of service following for FM broadcasting. We propose a method that can automatically search an available channel and re-broadcast the audio signal from a DAB tuner. Furthermore , the method detects the unusual change of signal while there is any station uses the same channel. If system detects abnormal change of received signal , the system will broadcast on another available channel and force the in-car radio switch to the same channel via Radio Data System (RDS).

摘要 I
Abstract II
誌謝 III
目錄 IV
圖目錄 V
表目錄 VII
第一章 緒論 1
1. 1 研究背景 1
1. 2 研究動機 4
1. 3 論文架構 4
第二章 廣播系統的服務跟隨 6
2. 1 調頻訊號的傳送與接收 6
2. 2 無線電資訊系統 10
2. 3 服務跟隨 12
第三章 系統架構 16
3. 1 系統原理 16
3. 2 硬體架構 17
3. 3 軟體架構 22
3.3. 1 系統運作 22
3.3. 2 空白頻道的搜尋 24
3.3. 3 服務跟隨時機的判斷 27
第四章 服務跟隨實作 31
4. 1 空白頻道的判斷測試 31
4. 2 傳送與接收訊號的穩定性測試 33
4. 3 服務跟隨時機判斷的測試 43
第五章 結論 49
參考文獻 50
附錄 A、無線電資訊系統的編碼 52
附錄 B、Si4711的控制 57

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