一种新的Turbo码译码迭代停止准则  

New iterative stopping criteria for Turbo code decoding

作　　者：蒲攀[1,2] 何东健[1] 田彩丽[2] 

机构地区：[1]西北农林科技大学机械与电子工程学院,陕西杨凌712100 [2]西北农林科技大学信息工程学院,陕西杨凌712100

出　　处：《计算机工程与应用》2009年第27期66-68,共3页Computer Engineering and Applications

摘　　要：介绍了Turbo码编码与译码原理。针对传统停止迭代准则译码耗费硬件资源的不足,提出了利用外部信息结合交叉熵迭代停止准则作为新的迭代停止准则算法。仿真分析结果显示:新的迭代停止准则可在不同的信噪比情况下,保证迭代次数适中并确保译码性能的稳定,应用该算法既可提高无线通信的数据传输质量、减小系统传输时延,又可最大限度地节约硬件资源。This paper introduces encode and decode principle of Turbo code.Owing to the disadvantage that traditional stopping criteria expend hardware resource too much,uses the combination of cross entropy criteria and exterior information by way of the stopping criteria.The result of simulation indicate that the new stopping criteria can guarantee the number of iteration and decoding capability under the circumstance of difference of Signal-to-Noise;it can increase the quality of digital wireless transmission, reduce the system delay and save hardware resource furthest by using this algorithm.

关 键 词：TURBO码 迭代停止准则 交叉熵准则 外部信息 

分 类 号：TN911.22[电子电信—通信与信息系统]