數位廣播隨著數位化的普及現在已愈來愈受到重視，且已開始在某些國家具體落實，它有傳統類比廣播如頻率調變(FM)及振幅調變(AM)所沒有的優點，這些優點包括改善收訊品質、提高音質、豐富廣播內容及提升頻道利用率...等。

本論文設計了一個能將數位廣播訊號轉換成類比廣播訊號的一種轉換裝置。提供使用者一種較經濟的方式來享受數位廣播，擁有它可以不用去購買一台同時兼含數位及傳統類比廣播接收功能的收音機，來收聽數位及傳統類比廣播節目。此轉換裝置的系統架構包含數位廣播訊號諧調器、無線數據系統編碼器、基頻混波器、副載波調變器、頻率調變調變器以及微處理機。

As the diffusion of digitization, people pay much more attention to Digital Audio Broadcasting (DAB), which is adopted in some countries. It offers the advantages that analogue audio broadcasting, such as FM and AM broadcasting, don’t have. These advantages include improved reception, improved clarity of sound, greater radio station choice, better channel utility rate and so on.

In this thesis, there is a design about a adapter that has the conversion of a digital audio broadcasting signal to an analog radio frequency signal. The device offers users a cheap way to enjoy listening Digital Audio Broadcasting. People can listen Digital Audio Broadcasting and analogue audio broadcasting programs without a DAB radio receivers. The system of the device include Digital Audio Broadcasting Tuner, Radio Data System Encoder, Baseband Mixer, Subcarrier Modulator, Frequency Modulation Modulator and Microprocessor.

參考文獻

[1] ETSI 300 401, Radio Broadcasting System：Digital Audio Broadcasting to mobile, portable and fixed receiver, v1.3.3, 2001.
[2] 蔡文彬，數位廣播多媒體應用，全華圖書，2006。
[3] T.Carroll, "Giving Dynamic Range Control to Consumers," TV TECHNOLOGY, New York, 2003.
[4] 蔡文彬，數位廣播實務，全華圖書，2005。
[5] W.Hoeg, T.Lauterbach, "Digital Audio broadcasting Principles and Applications, " John Wiley & Sons, New York, 2nd edition, 2003.
[6] 洪清標，「DAB數位廣播系統技術介紹(上)」，數位視訊多媒體月刊，民90.04 頁6-7。
[7] 洪清標，「DAB數位廣播系統技術介紹(下)」，數位視訊多媒體月刊，民90.05 頁4-5。
[8] M. G. Crosby, " Frequency Modulation Propagation Characteristics," Proceedings of the IRE, Vol. 24, No. 2, pp.898-913, 1936.
[9] Frequency Modulation： http://www.fas.org/man/dod-101/navy/docs/es310/FM.htm
[10] K. Nakahira, S. Okuma, T. Kodama, T, Furuhashi, " The use of binary coded frequency shift keyed signals for multiple user sonar ranging," 2004 IEEE International Conference on Networking, Vol. 2, pp.1271-1275, 2004.
[11] United States RBDS Standard, "Specification of the radio broadcast data system," 1998.
[12] 黃硯輝，使用易碎式及強健式浮水印之視訊錯誤偵測和隱匿方法，國立中山大學資訊工程研究所碩士論文，2006。
[13] Radio Data System in the UK：http://www.radioandtelly.co.uk/rds.html
[14] RDS Basics：http://www.2wcom.com/dl/rds-basics.pdf
[15] Y. H. Chen, "A Highly Integrated Dual Band Receiver IC for DAB," SoC Technical Journal, No. 2, pp.108-115, 2005
[16] 蔡錦福，震盪、調變與解調電路原理，全華圖書，1995。
[17] 黃獻霆，具有新型校正架構及歸零機制之十四位元數位類比轉換器，國立成功大學電機工程研究所碩士論文，2005。
[18] 林彥華，電流切換式四階ΔΣ調變器之設計，大同大學電機工程研究所碩士論文，1999。
[19] 林于傑，超寬頻接收機之次諧波混波器電路設計，大同大學電機工程研究所碩士論文，2007。
[20] 陳泊辰，可微調的直接數位式頻率產生器之設計，大同大學電機工程研究所碩士論文，2001。
[21] L. W. Couch, "Digital and Analog Communication Systems," Prentice Hall, 7th edition, New Jersey, 2006.