几个影响Woven卷积码纠错性能的因素.pdf

信息技术 2005 年第 7 期 Information Technology ( ) 　　中图分类号 :TN911. 22 　　文献标识码 :A 　　文章编号 :1009 - 2552 2005 07 - 0047 - 03 几个影响 Woven 卷积码纠错性能的因素 于 　浩 , 谢显中 , 范 　静 (重庆邮电学院移动通信重点实验室 , 重庆 400065) 摘 　要 : 为了解决性能和设备复杂性的矛盾 , 普通级联卷积码将两个卷积编码器串联 。然而在 ( ) 通信系统的接收端内码解码器会将差错汇集在突发 burst 中使外码解码器不能完全纠正这些错 误. Woven 卷积码采用特殊的 “编织”方式 , 将内码解码器的错误以某种形式分散开来 , 这种结 构使其获得良好的纠错性能 。本文在介绍 Woven 码的构造和生成矩阵后 , 对影响 Woven 码纠错 性能的几个因素进行了分析 。 关键词 : Woven 卷积码 ; 级联 ; 影响因素 Some influential factors of Woven convolutional codes ’error correction performance YU Hao , XIE Xianzhong , FAN Jing (Mobile Telecommunication Key Lab. , Chongqing University of Posts and Telecommunications , Chongqing 400065 ,China) Abstract : Cascaded convolutional code is a simple cascade of two convolutional encoders with low complexi ty. The error correction performance of such construction is not very promising. On the receiver side in a com munication system the inner decoder will group the errors in bursts , which the outer decoder cannot handle . Woven convolutional codes adopt the “Woven ”scheme to disperse the errors of inner coder in some special manner . This structure makes Woven convolutional codes perform better . In this paper , some influential fac tors of Woven convolutional codes’error correction performance are analyzed after intr