| 非均匀纠错Turbo码在图像无线传输中的应用 |
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| 引用本文： | 肖东亮,孙洪,江森,苏祥芳,保宗悌.非均匀纠错Turbo码在图像无线传输中的应用[J].电路与系统学报,2002,7(1):83-86. |
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| 作者姓名： | 肖东亮 孙洪 江森 苏祥芳 保宗悌 |
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| 作者单位： | 1. 武汉大学电子信息学院,湖北,武汉,430072
2. 华南师范大学电信工程系,广东,广州,510631 |
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| 基金项目： | 国家自然科学基金(60072041) 资助项目 |
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| 摘 要： | 本文根据信源泉编码流中信息比特重要性不均匀特点，采用变码率信道编码、分集发送、分集接收、非均匀迭代译码策略，对传统的Turbo码编译码器结构做了改进，给出了实验结果。通过比较发现，改进算法降低了时延，提高了Turbo码译码算法的纠错性能，特别适合于多媒体非实时无线传输业务。
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| 关 键 词： | Turbo码 非均匀纠错技术 算术编码 图像无线传输 |
| 文章编号： | 1007-0249(2002)01-0083-04 |
| 修稿时间： | 2001年6月18日 |
Turbo Codes with Unequal Error Protection method for Transmission of Images over Wireless channels |
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| XIAO Dong-liang,SUN Hong,JIANG Sen,SU Xiang-fang,BAO Zong-ti.Turbo Codes with Unequal Error Protection method for Transmission of Images over Wireless channels[J].Journal of Circuits and Systems,2002,7(1):83-86. |
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| Authors: | XIAO Dong-liang SUN Hong JIANG Sen SU Xiang-fang BAO Zong-ti |
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| Abstract: | We show that how Turbo codes can be endowed with unequal error protection(UEP).UEP is achieved by:1) suitably positioning the different importance classes of information symbols in the encoded information;2) puncturing the redundancy symbols with a non-uniform pattern;3) suitably choosing the number of decoding iteration which were matched to the different sensitivity of source encoded symbols;4) a scheme using convolution Turbo codes with four transmitters and four receivers has been proposed according to the different important classes. UEP is a promising choice due to its good performance and small delays. |
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| Keywords: | Turbo codes joint source-channel coding unequal error protection arithmetic coding |
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