为了提高多元低密度奇偶校验（LDPC,low density parity-check）码符号翻转译码算法的性能并降低译码的复杂度,提出了基于平均概率和停止准则的多元LDPC码加权符号翻转译码（APSCWSF,average probability and stopping criterion weight...为了提高多元低密度奇偶校验（LDPC,low density parity-check）码符号翻转译码算法的性能并降低译码的复杂度,提出了基于平均概率和停止准则的多元LDPC码加权符号翻转译码（APSCWSF,average probability and stopping criterion weighted symbol flipping）算法。该算法将校验节点邻接符号节点的平均概率信息作为权重,使翻转函数更加有效,提高符号的翻转效率,进而改善译码性能。并且通过设置迭代停止准则进一步加快算法的收敛速度。仿真结果显示,在加性高斯白噪声信道下,误符号率为10-5时,相比WSF算法、NSCWSF算法（Osc=10）和NSCWSF算法（Osc=6）,APSCWSF算法（Osc=10）分别获得约0.68 d B、0.83 d B和0.96 d B的增益。同时,APSCWSF算法（Osc=6）的平均迭代次数也分别降低78.60%~79.32%、74.89%~75.95%和67.20%~70.80%。展开更多
There are some mathematical models(see Example2.4)and analogous results in standard martingale theorywhich can not be described by the usual fuzzy martingaletheory because of the lack of corresponding semi-orderin the...There are some mathematical models(see Example2.4)and analogous results in standard martingale theorywhich can not be described by the usual fuzzy martingaletheory because of the lack of corresponding semi-orderin the fuzzy number space(E^n,D).In this paper,asuitable semi-order in the fuzzy number space(E^n,D)and the semi-order fuzzy supermartingale and submar-tingale are introduced,the charaterlstics of semi-ordersupermartingales and submartingales,as well as theDood’s stopping theorem for them(the bounded stoppingtimes theorem and the general stopping times theoremfor a class of closable semi-order fuzzy supermartin-gales and submartingales)are established.展开更多
文摘为了提高多元低密度奇偶校验（LDPC,low density parity-check）码符号翻转译码算法的性能并降低译码的复杂度,提出了基于平均概率和停止准则的多元LDPC码加权符号翻转译码（APSCWSF,average probability and stopping criterion weighted symbol flipping）算法。该算法将校验节点邻接符号节点的平均概率信息作为权重,使翻转函数更加有效,提高符号的翻转效率,进而改善译码性能。并且通过设置迭代停止准则进一步加快算法的收敛速度。仿真结果显示,在加性高斯白噪声信道下,误符号率为10-5时,相比WSF算法、NSCWSF算法（Osc=10）和NSCWSF算法（Osc=6）,APSCWSF算法（Osc=10）分别获得约0.68 d B、0.83 d B和0.96 d B的增益。同时,APSCWSF算法（Osc=6）的平均迭代次数也分别降低78.60%~79.32%、74.89%~75.95%和67.20%~70.80%。
文摘There are some mathematical models(see Example2.4)and analogous results in standard martingale theorywhich can not be described by the usual fuzzy martingaletheory because of the lack of corresponding semi-orderin the fuzzy number space(E^n,D).In this paper,asuitable semi-order in the fuzzy number space(E^n,D)and the semi-order fuzzy supermartingale and submar-tingale are introduced,the charaterlstics of semi-ordersupermartingales and submartingales,as well as theDood’s stopping theorem for them(the bounded stoppingtimes theorem and the general stopping times theoremfor a class of closable semi-order fuzzy supermartin-gales and submartingales)are established.
