Low error floor LT coding algorithm by using fixed-length node classification window
To solve the problem of high error floor for LT codes in additive white Gaussian noise (AWGN) channels, an improved coding scheme was designed.A fixed-length classification window was used to sort out the information nodes with relatively small degrees.Then these nodes would be forced to participate...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2021-09-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2021155/ |
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| _version_ | 1841539314336399360 |
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| author | Xin SONG Naiping CHENG Shuyan NI Yurong LIAO Tuofeng LEI |
| author_facet | Xin SONG Naiping CHENG Shuyan NI Yurong LIAO Tuofeng LEI |
| author_sort | Xin SONG |
| collection | DOAJ |
| description | To solve the problem of high error floor for LT codes in additive white Gaussian noise (AWGN) channels, an improved coding scheme was designed.A fixed-length classification window was used to sort out the information nodes with relatively small degrees.Then these nodes would be forced to participate in the coding process frequently, so that they could obtain sufficiently high reliability.To design the optimal parameters, firstly, the bit error rate (BER) performance of LT codes and the cause of the error floor were analyzed, and the theoretical BER lower bound was introduced as the first constraint.Secondly, the extrinsic information gain loss ratio (GLR) was designed to measure the convergence behavior of the improved LT code, and maximizing the GLR was denoted as the second constraint.Finally, the influence of different parameters on algorithm efficiency and coding complexity were analyzed, and the principle of priority selection of parameters was pointed out as the third constraint.The simulation results show that compared with the conventional LT code, the proposed algorithm can reduce the error floor by nearly three orders of magnitude.Besides, the designed LT code outperforms the existing LT codes in literature in terms of bit error rate (BER) performance. |
| format | Article |
| id | doaj-art-e031f0354858436db13fd95a0d1a7015 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2021-09-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-e031f0354858436db13fd95a0d1a70152025-01-14T07:22:38ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2021-09-0142314259744426Low error floor LT coding algorithm by using fixed-length node classification windowXin SONGNaiping CHENGShuyan NIYurong LIAOTuofeng LEITo solve the problem of high error floor for LT codes in additive white Gaussian noise (AWGN) channels, an improved coding scheme was designed.A fixed-length classification window was used to sort out the information nodes with relatively small degrees.Then these nodes would be forced to participate in the coding process frequently, so that they could obtain sufficiently high reliability.To design the optimal parameters, firstly, the bit error rate (BER) performance of LT codes and the cause of the error floor were analyzed, and the theoretical BER lower bound was introduced as the first constraint.Secondly, the extrinsic information gain loss ratio (GLR) was designed to measure the convergence behavior of the improved LT code, and maximizing the GLR was denoted as the second constraint.Finally, the influence of different parameters on algorithm efficiency and coding complexity were analyzed, and the principle of priority selection of parameters was pointed out as the third constraint.The simulation results show that compared with the conventional LT code, the proposed algorithm can reduce the error floor by nearly three orders of magnitude.Besides, the designed LT code outperforms the existing LT codes in literature in terms of bit error rate (BER) performance.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2021155/channel codingfountain codeconvergencebit error rate |
| spellingShingle | Xin SONG Naiping CHENG Shuyan NI Yurong LIAO Tuofeng LEI Low error floor LT coding algorithm by using fixed-length node classification window Tongxin xuebao channel coding fountain code convergence bit error rate |
| title | Low error floor LT coding algorithm by using fixed-length node classification window |
| title_full | Low error floor LT coding algorithm by using fixed-length node classification window |
| title_fullStr | Low error floor LT coding algorithm by using fixed-length node classification window |
| title_full_unstemmed | Low error floor LT coding algorithm by using fixed-length node classification window |
| title_short | Low error floor LT coding algorithm by using fixed-length node classification window |
| title_sort | low error floor lt coding algorithm by using fixed length node classification window |
| topic | channel coding fountain code convergence bit error rate |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2021155/ |
| work_keys_str_mv | AT xinsong lowerrorfloorltcodingalgorithmbyusingfixedlengthnodeclassificationwindow AT naipingcheng lowerrorfloorltcodingalgorithmbyusingfixedlengthnodeclassificationwindow AT shuyanni lowerrorfloorltcodingalgorithmbyusingfixedlengthnodeclassificationwindow AT yurongliao lowerrorfloorltcodingalgorithmbyusingfixedlengthnodeclassificationwindow AT tuofenglei lowerrorfloorltcodingalgorithmbyusingfixedlengthnodeclassificationwindow |