數位生活已是目前的趨勢，當前的數位廣播主要有音訊數位廣播DAB (Digital Audio Broadcasting)與全球數位廣播DRM (Digital Radio Mondiale)，分佈於不同的頻段，DAB能取代類比FM廣播，而DRM則是取代類比AM廣播，傳輸範圍甚至能遍及全球。 正交分頻多工(Orthogonal Frequency Division Multiplexing, OFDM)技術擁有節省頻寬的優勢，已成為新的無線通訊應用中最熱門的選擇，DRM亦採用OFDM系統，其傳輸的訊號有音訊、文字與圖片，因此在螢幕上可以顯示廣播相關訊息，助於聽眾快速瀏覽收聽內容。 在本論文中，透過DRM的規格進行接收端的設計分析與實現。在實現部分：利用個人電腦(PC)內部的傳輸器傳送資料，並以個人電腦的MATLAB軟體錄製並處理訊號，如同步機制、通道估測與訊號解碼；在分析部分：依照DRM規格產生訊號，設計濾波器，以及分析接收端在不同的時序偏移、載波偏移與取樣偏移所造成的影響。 There is a tendency towards Digital life. In recently digital broadcasting technique, such as Digital Audio Broadcasting (DAB) and Digital Radio Mondiale (DRM), occupy different frequency bands. DAB replace analogue Frequency Modulation (FM) radio while DRM replace analogue Amplitude Modulation (AM) radio. Especially DRM can transmit worldwide. OFDM technique becomes popular choice of wireless communication application because the advantage of high frequency efficiency. DRM using OFDM system can transmit voices, characters, and figure data. Therefore, the audience can get information more clearly. Designing and analyzing the DRM receiver is the topic in this thesis. The receiver process the real signal recorded on a personal computer, including low-pass filter design, synchronization schemes, channel estimation.
