隨著無線通訊技術的進步，數位廣播系統已取代了舊有的類比AM 和 FM。在數位廣播系統裡有很多種主要規格，包含歐洲多國使用的Eureka-147以及法國的DRM。但這些規格都因為需要重新指定新的使用頻帶，而需要很大的成本。因此,美國大力發展HD Radio規格，其使用 IBOC (In-Band On-Channel) 技術，使舊有的類比訊號可以和新的數位訊號相容於舊有的頻帶上。使用者也可以自行選擇是否購買新的數位接收器以收聽音質較好且可以提供其它附加資訊的數位廣播或是繼續使用舊有的類比廣播。
本論文第一部分建立了HD Radio FM 系統實體層傳送端及接收端的模擬平台。第二部分針對了因為此系統舊有類比及新的數位訊號需相容於相同頻帶上，導致相鄰電台可能會對自身電台數位訊號產生多重進接干擾(Multiple Access Interference) 或稱旁頻帶干擾(Adjacent Channel Interference)的問題之相關解決方法整理及比較。最後，我們同時考量了訊源編碼及實體層頻譜映射後，提出了多位元流訊源編碼的設計。本論文第三部分為硬體實作，我們將HD Radio FM基頻系統在 Xilinx Virtex-4 FPGA 驗證平台上進行實現。

The advance of wireless communications brings in various technique of digital radio broadcasting specifications, such as Eureka-147 and DRM (Digital Radio Mondiale), to replace conventional analog broadcasting system. However, these systems require new spectrum assignment, which is a huge cost due to depletion of the available spectrum.
Therefore, the IBOC (In-Band On-Channel) system has been developed by US government to work in the same band with the conventional analog radio and broadcasting digital signal simultaneously. Besides, the users can depend on their own demand to decide whether to buy the digital radio receiver, which provide excellent audio quality and other useful additional information, or not to buy and use conventional analog radio receiver continuously.
In this thesis, we build the simulation platform of the physical layer of HD Radio FM system firstly, including transmitter and receiver. Secondly, we discuss the phenomenon of interference due to adjacent broadcasting channel, which called “adjacent channel interference” or “multiple access interference (MAI)”. Therefore, we discuss and compare some MAI interference mitigation methods and propose the design of multi-stream source codec which considers both source and spectral mapping schemes for this interference problem. Finally, we implement this system on Xilinx Virtex-4 FPGA development platform.

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