KB turbo码中交织器的设计  

INTERLEAVERS FOR KB TURBO CODE

作　　者：孙毅[1] 高路[1] 赵建平[1] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程系,181信箱北京100876

出　　处：《电子与信息学报》2001年第5期503-506,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金 69896234

摘　　要：已知比特(KB,Known Bits)turbo码是采用将KB周期性的插入到信息比特中,不显著增加系统复杂程度而较大提高turbo码译码性能。但因为一般采用了随机交织器,所以在引入KB方法时,产生了不等差错保护的问题。这个问题可以通过采用KB交织器,将KB在交织器中均匀分配来解决。仿真证实,以伪随机交织器和S随机交织器为基础的KB交织器可以显著提高系统性能。而且采用KB turbo码可以方便地实现速率适配,满足第三代移动通信系统的要求。Known Bits(KB) method is a way of increasing the performance of turbo code by inserting 'known bits' periodically in a code word without increasing in complexity. KB method normally causes uneven protection due to the process of random interleaving. This problem can be solved with a KB interleaver to ensure uniform distribution of KB. It is found that KB interleaver can improve the performance of turbo code with pseudo random interleaver or S-random interleavers. This method also makes a rate-matching to be easy which is fairly important for systems using turbo codes.

关 键 词：KB TURBO码 交织器 设计 信道编码 

分 类 号：TN911.22[电子电信—通信与信息系统]