LTE系统中截尾卷积码译码算法研究及仿真性能分析

Research on an-based decode of Tail-biting convolutional codes and their performance analyses used to LTE system

在LTE的下行控制信道和广播信道中采用了截尾卷积编码方式,本文介绍了LTE系统中采用的卷积编码器以及广播信道架构,详细分析了截尾卷积码的两种常用译码算法,文章提出了一种改进循环译码算法,在基于LTE-PBCH信道链路中对各种译码算法进行仿真,仿真测试结果表明,截尾卷积码可满足LTE信道对高速率业务的要求,双回溯循环译码算法的译码性能最佳。

Tail-biting convolutional codes used in Physical broadcast channel and Physlcal flownlink control channel of LTE, this paper introduced the architecture of the convolutional encoder and Physical broadcast channel used in LTE, a detailed analysis of two common Viterbi algorithm,then put forward a new improved Viterbi algorithm, and in Physical broadcast channel system simulation was carried out. The conclusions indicate that the tail-biting convolutional codes adapt to LTE channel. Furthermore,the result proved that the Double trace-back Viterbi algorithm have the less errors in the same Signal to Noise Ratio.