摘要
Turbo码近年来一直是通信领域的研究重点,寻找好的分量码即是一个重要方向。Turbo码分量码编码器采用了以本原多项式作为反馈连接多项式的递归系统卷积码,以获得最大的最小码重和最大的自由距离。本文说明了另一个影响卷积码纠错能力的参量活性突发距离,提出以卷积码的斜率因子为替代参量来分析Turbo码。仿真说明在采用同一个本原多项式作为反馈连接多项式的情况下,分量码的斜率因子越大,则Turbo码的纠错性能相应越好,斜率因子可以作为评价Turbo码性能的另一个重要参数。
Turbo codes are being a highlight in communication field recent years. Searching a good component encoder is an important direction. A recursive systematic convolutional encoder using a primitive polynomial as its recursive polynomial is used in Turbo codes＇ component encoder,which provides the maximum minimum weight and the maximum free distance. The active burst distance affects the performance of convolutional codes too. The method of analyzing Turbo codes by the slope of convolutlonal codes is presented. Simulation results show that using the same recursive polynomial, performance of Turbo codes becomes better as the slope grows ,which means the slope can be considered as an important parameter to estimate and optimize the Turbo codes.
出处
《现代电子技术》
2005年第17期15-16,共2页
Modern Electronics Technique
