查询结果:   黄晓红,高荣蔓.过采样滤波器组作为纠错码的阈值新算法[J].计算机应用与软件,2015,32(6):160 - 162,207.
中文标题
过采样滤波器组作为纠错码的阈值新算法
发表栏目
网络与通信
摘要点击数
788
英文标题
NEW THRESHOLD ALGORITHM WITH OFBS AS ERROR-CORRECTION CODE
作 者
黄晓红 高荣蔓 Huang Xiaohong Gao Rongman
作者单位
河北联合大学信息工程学院 河北 唐山 063009     
英文单位
School of Information Engineering,Hebei United University,Tangshan 063009,Hebei,China     
关键词
过采样滤波器组 纠错码 阈值 联合信源信道编码
Keywords
Oversampled filter banks (OFBS) Error correction code Threshold JSCC
基金项目
河北省教育厅项目(Q2012029)
作者资料
黄晓红,教授,主研领域:数字信号处理。高荣蔓,硕士生。 。
文章摘要
考虑量化噪声和信道噪声,搭建基于过采样滤波器组OFBS(Oversampled Filter Banks)的联合信源信道编码系统,研究系统的传输检错纠错性能。提出新的阈值选取方法,该方法是基于贝叶斯假设检验为理论依据的,能根据实际信号和噪声统计特性做实时分析,得出适当的阈值。通过Matlab对系统进行仿真,结果表明信道在不同的转移概率条件,OFBS作为纠错码的阈值新算法的计算复杂度低,并且有很好的检错纠错性能。通过对一维信号的纠错,信号的峰值信噪比平均提高1到2 db。
Abstract
Considering the quantisation noise and channel noise, we construct OFBS-based joint source-channel coding (JSCC) system, and study the performance of transmission error detection and correction of the system. We also propose a new threshold selection method, which is based on Bayesian hypothesis testing and takes it for the theoretical basis, it can carry out real-time analysis according to practical signal and noise statistical characteristics to obtain the proper threshold. The system is simulated with Matlab, results show that when channel is under different transition probability conditions, the new threshold algorithm using OFBS as error-correcting codes has low computational complexity, and has good error correction performance as well. Through error correction on one-dimensional signal, the peak signal-noise ratio of the signal improves 1 db to 2 db in average.
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