Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes
碩士 === 中華大學 === 資訊工程學系碩士班 === 99 === Low-Density Parity-Check (LDPC) code is a powerful error correction code. Although first proposed in the 1960’s, it was not implemented due to its high hardware complexity. Recently, with the advance of VLSI technology, LDPC codes find extensively application in...
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ndltd-TW-099CHPI53920342015-10-13T20:22:59Z http://ndltd.ncl.edu.tw/handle/93493377638562579381 Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes 倍率調整的動態解碼排程應用於UEP LDPC碼之實驗結果分析 Hsiao, Jen-Wei 蕭仁瑋 碩士 中華大學 資訊工程學系碩士班 99 Low-Density Parity-Check (LDPC) code is a powerful error correction code. Although first proposed in the 1960’s, it was not implemented due to its high hardware complexity. Recently, with the advance of VLSI technology, LDPC codes find extensively application in communication systems. Rahnavard et al. proposed how to achieve Unequal Error Protection (UEP) in LDPC code by appropriate code design. Their code design assigns different degrees to different groups of data bits. A dynamic scheduling decoding algorithm called Informed Dynamic Scheduling (IDS) was introduced to achieve configurable UEP for LDPC codes. The algorithm multiplies the residual of each group with different coefficients, trying to change the bit error rate (BER) of each group by altering their decoding schedules. Unfortunately, the attempt was not successful. Sometimes, the results even go in the opposite direction. Their strange results motivated our research. In this paper, we analyzed the coefficient method and found that the coefficient multiplication indeed changed the number of updates. However, it didn’t change the bit error rates. Why this phenomenon happen remains unanswered and it will need further studies. Yu, Chang Wu 俞征武 2011 學位論文 ; thesis 47 zh-TW |
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碩士 === 中華大學 === 資訊工程學系碩士班 === 99 === Low-Density Parity-Check (LDPC) code is a powerful error correction code. Although first proposed in the 1960’s, it was not implemented due to its high hardware complexity. Recently, with the advance of VLSI technology, LDPC codes find extensively application in communication systems. Rahnavard et al. proposed how to achieve Unequal Error Protection (UEP) in LDPC code by appropriate code design. Their code design assigns different degrees to different groups of data bits. A dynamic scheduling decoding algorithm called Informed Dynamic Scheduling (IDS) was introduced to achieve configurable UEP for LDPC codes. The algorithm multiplies the residual of each group with different coefficients, trying to change the bit error rate (BER) of each group by altering their decoding schedules. Unfortunately, the attempt was not successful. Sometimes, the results even go in the opposite direction. Their strange results motivated our research. In this paper, we analyzed the coefficient method and found that the coefficient multiplication indeed changed the number of updates. However, it didn’t change the bit error rates. Why this phenomenon happen remains unanswered and it will need further studies.
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author2 |
Yu, Chang Wu |
author_facet |
Yu, Chang Wu Hsiao, Jen-Wei 蕭仁瑋 |
author |
Hsiao, Jen-Wei 蕭仁瑋 |
spellingShingle |
Hsiao, Jen-Wei 蕭仁瑋 Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes |
author_sort |
Hsiao, Jen-Wei |
title |
Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes |
title_short |
Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes |
title_full |
Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes |
title_fullStr |
Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes |
title_full_unstemmed |
Analysis of Using Weighted Dynamic Scheduling on UEP LDPC Codes |
title_sort |
analysis of using weighted dynamic scheduling on uep ldpc codes |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/93493377638562579381 |
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