利用外信息平衡因子改善Turbo码译码性能  

Improving Turbo Decoding Performance Using Extrinsic Information Balance Factor

作　　者：邵菲[1] 周辉[1] 

机构地区：[1]装备指挥技术学院信息装备系,北京101416

出　　处：《装备指挥技术学院学报》2006年第4期73-77,共5页Journal of the Academy of Equipment Command & Technology

摘　　要：一般在Turbo码的迭代译码过程中，所利用的外信息均来源于信道的接收信息，而这种单一的外信息来源方式，并不能使Turbo码的性能达到最佳；引入了外信息平衡因子，在译码硬判决后通过误码检测提取有用的误码信息，提高外信息的可靠性；给出了一个图像传输系统的实例及其结果分析；实验结果表明：采用该方法可以减少迭代次数，进一步提高Turbo码的译码性能。Almost all used in the course of Turbo decoding are the information received by the channel, which will not help to produce the best decoding performance. Modifying the extrinsic information through error detection and providing the balance factor can improve the performance of Turbo decoding and the reliability of the extrinsic information. An example of image transmission system with its application is given in the paper. The experience results show that the method will improve the decoding efficiency and transmission performance.

关 键 词：TURBO码译码 外信息 平衡因子 

分 类 号：TN911.22[电子电信—通信与信息系统]