QPP交织器的修正量度算法

交织器是Turbo信道编码的重要组成部分，交织器的扩展因子通常是衡量一个交织器好坏的量度。阐述了基于整数环的QPP（quadraticpermutationpolynomials）交织器可以产生最大扩展因子，从代数几何视角研究了交织器的修正了的非线性度性质，提出了一种交织器的新的量度，这个量度是扩展因子和非线性度的函数。通过计算机仿真表明，由这种新的量度选择的交织器在误码率上表现出较优性能。

The Algorithm of Refined Metric of Quadratic Permutation Polynomial Interleavers

An interleaver is a critical component for the channel coding performance of turbo codes. An interleaver of quadratic permutation polynomials over integer rings that could generate maximum-spread factor was presented. New properties of permutation polynomial interleavers were investigated from an al- gebraic-geometric perspective resulting in a new non-linearity metric for interleavers. A new interleaver metric that is a function of both the non-linearity metric and the spread factor was proposed. Extensive computer simulation results confirm the efficacy of the new metric on the error rates.