【作者】 许兆； 王珂； 李卓；

【Author】 XU Zhao WANG Ke LI Zhuo (College of Communications and Engineering,Jilin University,Changchun 130022)

【机构】 吉林大学通信工程学院；

【摘要】 论文提出了一种基于线性预测控制的Turbo码译码结构。将SISO模块近似等价为线性模块并建立线性模型,通过分量译码器前n次的外部信息值来预测第n+1次的外部信息值,并代替其第n+1次的译码外部信息值。由于线性预测控制模块的计算量和计算时间均小于译码算法,因此,相比于传统的译码方案,可以降低译码算法的复杂度并减少译码时延。仿真结果表明,基于线性预测控制的Turbo码译码结构的误码率性能比传统的Turbo码译码结构低0.1-0.2dB,但是可以减少分量译码器的一次译码迭代。更多还原

【Abstract】 This paper presents an improved decoding structure of Turbo code based on Linear Prediction Control algorithm.The SISO module could be equivalent to a linear module established by the values of the former exterior information of the component decoder.The value of No(n+1)exterior information could be predicted by the linear module.Compared to.the traditional decgding algorithm,the computation quantity and computing time of the Linear Prediction Control Algorithm(LPCA)will be smaller.Therefore,the complexity and delay of the decoding algorithm can be reduced by the new decoding scheme presented in this paper.The simulation results show that the error-rate performance of the new decoding structure based on LPCA is only lower by 0.1-0.2dB than the traditional Turbo decoding structure,but it can reduce a decoding iterative process of the component decoder.更多还原