摘要
Turbo码由于其卓越的前向纠错能力在当今无线通信领域甚至有线通信领域受到了普遍的重视 ,WCDMA以及 CDMA2 0 0 0已经将其作为信道编码的关键技术。它的迭代译码过程需要 SNR的确切信息 ,以此来获得单个译码器输出的后验信息 ,因此主要探索了最终译码性能对 SNR正确性的依赖程度 ,并且提供了一种 SNR的估计方法 ,通过仿真显示出这种估计方法能够提供良好的译码性能。
Because of its excellent ability of forward error correction, turbo codes catch the eyes of many investigators in wireless communications and also in other fields of communications, and they becomes the key technology of channel coding in CDMA2000 and WCDMA system. Because in its iterative decoding process information of SNR is needed to produce proper posterior information of sub-decoders, this paper mainly explores how the final performance relies on correctness of SNR, and then provides a method to estimate it and demonstrate the good performance of the estimation by simulation.
出处
《重庆邮电学院学报（自然科学版）》
2002年第2期33-35,共3页
Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)
