Π(n)=f1n−fnn2 mod K, where the QPP coefficients f1 and f2 are designed to provide good error performance for a given block length K."/>
QPP interleaver/de-interleaver for turbo codes
A quadratic permutation polynomial (QPP) interleaver is described for turbo coding and decoding. The QPP interleaver has the form:Π(n)=f1n−fnn2 mod K, where the QPP coefficients f1 and f2 are designed to provide good error performance for a given block length K.
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机译：描述了用于涡轮编码和解码的二次置换多项式（QPP）交织器。 QPP交织器具有以下形式：<？in-line-formulae description =“在线公式” end =“ lead”？>Π（ n ）= f 1 nf n n 2 mod K， <？公式description =“ In-line Formulae” end =“ tail”？>其中QPP系数f 1 和f 2 旨在为给定的块长度K提供良好的错误性能。
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