衰落信道硬判决解调下的Turbo码译码方法  

Hard-decision decoding methods of Turbo codes in fading channels

作　　者：王昊博[1] 陈为刚[1] 吴月敏[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《信息技术》2013年第6期29-32,共4页Information Technology

基　　金：2011天津市科技兴海项目(KJXH2011-2);天津市自然科学基金(11JCYBJC00400)

摘　　要：实际应用中某些通信系统的解调器只能输出硬判决信息,无法较好地匹配Turbo码采用的软输入软输出译码算法。针对衰落信道,提出了一种对硬判决信息进行修正,改善Turbo码译码性能的方法。该方法通过对译码初始化信息根据不同的可靠性进行补偿,可改善来自信道的硬判决接收值的准确性。仿真结果表明,改进方法可有效提高Turbo码译码的性能,复杂度也较低。In practical application, some demodulators could only provide hard-decision values, which are not compatible with the coding scheme using soft-in soft-out decoder, such as Turbo decoders. For fading channels, a decoding method was proposed which modifies the hard-decision values and improves the decoding performance. By compensating the decoding initial information with different reliable levels, the method proposed improves the accuracy of hard-decision values from channels. The simulation results show that, the improved method could improve the performance of Turbo decoding effectively with quite low complexity.

关 键 词：TURBO码 硬判决 瑞利衰落信道 协作通信 

分 类 号：TN911.22[电子电信—通信与信息系统]