以C語言實現PC為基礎的軟體數位電視廣播接收器的硬式交遞通道解碼

Hard Iterative Channel Decoding for PC -Based Software DVB-T Receiver by C Code

林宏坤(Hong-Kung Lin)

指導教授 ： 曾恕銘

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00076

摘要

先前論文架構只在里德索羅門解碼器確認封包為正確時去更改維特比解碼器的輸入。除此之外，我們提出在里德索羅門解碼器確認封包為錯誤時去改變維特比解碼器輸入的路徑計量值的參數Q。Q定義為通道狀態資訊的絕對值平方，Q=|CSI|2。我們在里德索羅門解碼器確認封包為錯誤時更改維特比解碼器輸入的路徑計量值Q，使其為最大值，因此維特比演算法則不會選擇到此條錯誤的路徑。實際測試的結果顯示所提出有含Q調整的架構優於先前不包含Q調整的架構。

關鍵字

硬式交遞通道解碼 ； 數位電視廣播 ； 維特比解碼 ； 里德索羅門解碼器

並列摘要

The previous scheme only modifies the Viterbi decoder input positions where the Reed-Solomon decoder makes sure they are correct. Besides that, we propose to change the parameter Q of the metrics of the Viterbi decoder input positions where the Reed-Solomon decoder makes sure they are incorrect. The Q is defined as the norm of channel state information (CSI), Q=|CSI|2. We propose to change Q to maximum for the Viterbi decoder input positions where the Reed-Solomon decoder makes sure they are incorrect, so the incorrect paths are unlikely to be selected in the Viterbi algorithm. The field test results show that the proposed scheme with Q modification outperforms the previous scheme without Q modification.

並列關鍵字

Hard iterative channel decoding ； DVB-T ； Viterbi decoding ； Reed-Solomon decoder

參考文獻

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[1]ETSI EN 300 744, “Digital Video Broadcasting (DVB): Framing structure, channel coding and modulation for digital terrestrial television,” v1.5.1, Nov. 2004.

[3]Jian-Cheng Yu, Yueh-Teng Hsu, Shin-En Wang, and Shu-Ming Tseng, “Iteraitve Channel decoding for PC-based Software Radio DVB-T Receiver,” in IEEE International Conference on Consumer Electronics (ICCE), pp.397-398, Mar. 2011.

[4]Jian-Cheng Yu, Jheng-Zong Shih, Yueh-Teng Hsu, and Shu-Ming Tseng, “Reed-Solomon Decoder Optimization For PC-based DVB-T Software Radio Receiver,” in IEEE International Conference on Consumer Electronics (ICCE), pp.393-394, Mar. 2011.