請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28391
標題: | 歐規數位電視地面/手持廣播基頻接收機之設計與實作 Design and Implementation of a Baseband Receiver for DVB-T/H Standard |
作者: | Tsung-Han Yu 游宗翰 |
指導教授: | 闕志達(Tzi-Dar Chiueh) |
關鍵字: | 數位電視,基頻接收機, DVB-T,DVB-H, |
出版年 : | 2007 |
學位: | 碩士 |
摘要: | 本論文探討歐規數位電視地面/手持廣播系統(DVB-T/H)之特色與規格。此外,基頻通道模型在本論文中也予以討論,其中通道效應包含多路徑衰減通道(Multipath Fading Effect)、加成性白色高斯雜訊(AWGN)、載波頻率漂移(Carrier Frequency Offset)、取樣時脈漂移(Sampling Clock Offset)、以及相位雜訊(Phase Noise)。根據此規格以及通道模型,本論文提出一基頻接收機,包含各模組之演算法,電路設計,以及硬體實做。為了支援移動接收之機能,本論文提出一通道估測及補償之演算法,並結合一兩階段模式偵測、符元時間偵測、載波頻率漂移與取樣時脈漂移之估測、補償及追蹤、2/4/8K FFT處理器、相位調整、軟性輸出解映射器及軟性輸入維特比解碼器。此外,為了降低系統之複雜度,於模式增測及整數載波頻率漂移之估測等處予以硬體簡化。為了解調傳輸參數訊號,一BCH解碼器也於本論文提出及設計。透過輸出訊噪比(Output SNR)取代位元錯誤率(BER)來做為決定最佳位元數之指標,進行全系統之定點數模擬。最後經由全系統之效能模擬及全系統之Verilog RTL程式之實做與驗證,證明本論文所提出之DVB-T/H基頻接收機之良好效能。 In this thesis, the features and specification of Europe DVB-T/H standard have been delineated. Besides, a baseband channel model has been discussed, including multipath fading effect, AWGN, CFO effect, SCO effect, and phase noise. Based on the standard and a baseband equivalent channel model, a baseband receiver is proposed, including algorithms, circuit design and Verilog RTL code implementation. To support mobile reception, this thesis proposes the channel estimation and equalization algorithm and combines algorithms of a two-stage mode detection, symbol timing detection, CFO as well as SCO estimation and compensation, 2/4/8K FFT processor, phase modification soft-output de-mapper and soft-input Viterbi decoder. In addition, to reduce the hardware complexity, the GI mode detection module and integer CFO module have been modified; to decode the TPS signal, a BCH decoder is designed and implemented as well. Through output SNR instead of bit error rate (BER) as the metric of the word-length determination, the optimal word-length can be obtained. By means of system performance simulation and verification of whole Verilog RTL code, the proposed DVB-T/H baseband receiver is proven to work well. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28391 |
全文授權: | 有償授權 |
顯示於系所單位: | 電子工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-96-1.pdf 目前未授權公開取用 | 7.66 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。