厦门理工学院学报
廈門理工學院學報
하문리공학원학보
JOURNAL OF XIAMEN UNIVERSITY OF TECHNOLOGY
2014年
5期
51-55
,共5页
TET-LDPC码%EXIT图%门限值%优化分析
TET-LDPC碼%EXIT圖%門限值%優化分析
TET-LDPC마%EXIT도%문한치%우화분석
TET-LDPC code%EXIT chart%threshold%optimization and analysis
两边类型低密度奇偶校验码( two-edge type low density parity check, TET-LDPC码)是一种高效的信道纠错码,其性能受到删余变量节点度( punctured variable node degree, PVN度)的影响。为了分析PVN度对TET-LDPC码纠错性能的影响,基于外信息转移图( extrinsic information transfer, EXIT图)估算了TET-LDPC码在不同PVN度情况下的门限值,利用门限值的好坏来分析纠错性能的优劣,进而通过选取门限值好的PVN度优化TET-LDPC码。仿真结果显示,经过EXIT图优化的TET-LDPC码具有更好的纠错性能。利用EXIT图优化分析TET-LDPC码的方法,比现有的仿真试值法更加简捷、直观。
兩邊類型低密度奇偶校驗碼( two-edge type low density parity check, TET-LDPC碼)是一種高效的信道糾錯碼,其性能受到刪餘變量節點度( punctured variable node degree, PVN度)的影響。為瞭分析PVN度對TET-LDPC碼糾錯性能的影響,基于外信息轉移圖( extrinsic information transfer, EXIT圖)估算瞭TET-LDPC碼在不同PVN度情況下的門限值,利用門限值的好壞來分析糾錯性能的優劣,進而通過選取門限值好的PVN度優化TET-LDPC碼。倣真結果顯示,經過EXIT圖優化的TET-LDPC碼具有更好的糾錯性能。利用EXIT圖優化分析TET-LDPC碼的方法,比現有的倣真試值法更加簡捷、直觀。
량변류형저밀도기우교험마( two-edge type low density parity check, TET-LDPC마)시일충고효적신도규착마,기성능수도산여변량절점도( punctured variable node degree, PVN도)적영향。위료분석PVN도대TET-LDPC마규착성능적영향,기우외신식전이도( extrinsic information transfer, EXIT도)고산료TET-LDPC마재불동PVN도정황하적문한치,이용문한치적호배래분석규착성능적우렬,진이통과선취문한치호적PVN도우화TET-LDPC마。방진결과현시,경과EXIT도우화적TET-LDPC마구유경호적규착성능。이용EXIT도우화분석TET-LDPC마적방법,비현유적방진시치법경가간첩、직관。
Two-edge type LDPC ( TET-LDPC) codes are a class of good channel error-correction codes. Their performances are significantly impacted by punctured variable node ( PVN) degrees. In order to analyze the impact of PVN degrees on TET-LDPC codes, an optimization and analysis method was proposed to estimate the thresholds of TET-LDPC codes with different PVN degrees based on extrinsic information transfer ( EXIT) charts. Since good thresholds indicated good performances, the optimization of TET-LDPC codes was accomplished by choosing PVN degrees with good thresholds. Simulation results showed that the TET-LDPC codes optimized by the proposed method outperformed other TET-LDPC codes. The proposed EXIT-chart-based optimization and analysis method is easier and more visual than the exiting performance-simulation method.
