數位電視地面廣播基頻收發機之設計

Baseband Transceiver Design for the DVB-Terrestrial Standard

陳怡如(Yi-Ju Chen)

指導教授 ： 闕志達

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.01892

摘要

數位電視的發展為未來的一大趨勢，在本論文中，我們根據歐規數位電視地面廣播（Digital Video Broadcast - Terrestrial）系統的傳送機規格，以及考量通道非理想特性所提出的接收機架構之設計。在接收端主要分為同步、通道響應估測以及通道編碼的解碼三大部分。在同步的地方又可分為初始的符元邊界估測以及之後的載波頻率漂移和時脈漂移的追蹤迴路；通道響應中使用散佈領航碼來做二維通道響應的內插。通道編碼的解碼使用主要使用維特比解碼器以及里德所羅門解碼器，分別先經過內外反交錯器後解碼，在維特比解碼使用的是hard-decision解碼器。除了能在靜態通道中使用，由模擬結果可以看到若使用較好的傳輸模組，系統能在應用在移動接收的環境中。

關鍵字

地面廣播 ； 數位電視

並列摘要

In the thesis, we propose a DVB-T（Digital Video Broadcast - Terrestrial）baseband receiver. The architecture is established according to the standard and several channel impairments. The receiver architecture has three major parts including synchronization, channel response estimation and channel decoding. The synchronization part comprises symbol boundary detection and carrier frequency offset and timing offset estimation and tracking. Channel response is estimated by means of two-dimension interpolation of scattered pilots. In the channel decoder part, a concatenated error correction decoder is used. The outer decoder is Reed-Solomon decoder and the inner decoder is a hard-decision Viterbi decoder. In the thesis, several simulations and performances are presented and discussed in the final.

並列關鍵字

dvb-t ； ofdm ； baseband transceiver

參考文獻

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