講演抄録/キーワード |
講演名 |
2011-12-12 09:25
A Computationally Efficient Early Stopping Method for DVB-S2 LDPC Decoder ○Gwan Seok Jang(UST-ETRI)・In Ki Lee・Dae Ig Chang・Deock Gil Oh(ETRI) SAT2011-40 |
抄録 |
(和) |
Satellite communication requires powerful forward error correction scheme because of long transmission delay. Thus, the low density parity check (LDPC) code is adopted for the forward error correction code in DVB-S2 standard. Because decoding process of LDPC code is based on the iterative soft decoding, it is critical fact for decoder to reduce the average number of iterations. Therefore we briefly introduce a conventional hard decision based early stopping method. We also introduce that the conventional early stopping method is combined with a horizontal shuffling scheduling (HSS) algorithm which is one of layered decoding scheme. However, the computational complexity of this conventional hard decision based method is still high, because this computes the early stopping criterion at the end of iterations. In this paper, we propose a computationally efficient early stopping method which computes the early stopping criterion at specific iterations. The simulation results show that the proposed early stopping method reduces the number of iterations of LDPC decoding algorithm. Furthermore, the computational complexity of proposed early stopping method is fewer than those of the conventional HD based early stopping method. |
(英) |
Satellite communication requires powerful forward error correction scheme because of long transmission delay. Thus, the low density parity check (LDPC) code is adopted for the forward error correction code in DVB-S2 standard. Because decoding process of LDPC code is based on the iterative soft decoding, it is critical fact for decoder to reduce the average number of iterations. Therefore we briefly introduce a conventional hard decision based early stopping method. We also introduce that the conventional early stopping method is combined with a horizontal shuffling scheduling (HSS) algorithm which is one of layered decoding scheme. However, the computational complexity of this conventional hard decision based method is still high, because this computes the early stopping criterion at the end of iterations. In this paper, we propose a computationally efficient early stopping method which computes the early stopping criterion at specific iterations. The simulation results show that the proposed early stopping method reduces the number of iterations of LDPC decoding algorithm. Furthermore, the computational complexity of proposed early stopping method is fewer than those of the conventional HD based early stopping method. |
キーワード |
(和) |
Early stooping, LDPC / LDPC / Layered Decoding / Horizontal shuffling scheduling, / HSS / DVB-S2 / Satellite / Forward Error Correction code |
(英) |
Early stooping, LDPC / LDPC / Layered Decoding / Horizontal shuffling scheduling, / HSS / DVB-S2 / Satellite / Forward Error Correction code |
文献情報 |
信学技報, vol. 111, no. 336, SAT2011-40, pp. 7-12, 2011年12月. |
資料番号 |
SAT2011-40 |
発行日 |
2011-12-05 (SAT) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SAT2011-40 |
|