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IntroductionTurbo codes[1] has been shown to yield re-markable coding gains close to theoretical limits,yetadmitting a relatively simple iterative decordingtechnique,which are attracting the attention ofmany researchers.Owing to the parallel concate-nation,the code rate ofturbo codes,denoted as R,is low.Puncturing is the predominant strategy toconstruct high code rate turbo codes[2 ,3 ] .Punctur-ing schemes are crucial to the performance ofpunc-tured turbo codes( PTC) .Since any puncturingsc… 相似文献
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