| 基于代价函数的译码器自适应定点截短算法 |
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| 引用本文： | 梁栋,方涵,张春飞,王文博.基于代价函数的译码器自适应定点截短算法[J].北京邮电大学学报,2011,34(2):76-80. |
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| 作者姓名： | 梁栋 方涵 张春飞 王文博 |
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| 作者单位： | 泛网无线通信教育部重点实验室(北京邮电大学),北京,100876;泛网无线通信教育部重点实验室(北京邮电大学),北京,100876;泛网无线通信教育部重点实验室(北京邮电大学),北京,100876;泛网无线通信教育部重点实验室(北京邮电大学),北京,100876 |
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| 基金项目： | 国家高技术研究发展计划项目(2009AA01Z244) |
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| 摘 要： | 分析比较了现有典型定点截短算法的性能和优缺点，提出了一种联合考虑上溢出和下溢出的基于代价函数的自适应定点截短算法，其性能优于其他截短算法,接近于穷举法；时间复杂度大大低于穷举法，与其他截短算法相仿. 该算法被用于开发基于叠加码的广播通信系统硬件平台中，其有效性在软件仿真和硬件平台上得到了验证.
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| 关 键 词： | 无线通信 软译码 定点仿真 溢出 叠加码 |
| 收稿时间： | 2010-06-26 |
An Algorithm of Fix-Point Information Interception for Soft Decoding Based on Cost function |
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| LIANG Dong,FANG Han,ZHANG Chun-fei,WANG Wen-bo.An Algorithm of Fix-Point Information Interception for Soft Decoding Based on Cost function[J].Journal of Beijing University of Posts and Telecommunications,2011,34(2):76-80. |
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| Authors: | LIANG Dong FANG Han ZHANG Chun-fei WANG Wen-bo |
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| Affiliation: | LIANG Dong,FANG Han,ZHANG Chun-fei,WANG Wen-bo(Key Laboratory of Universal Wireless Communication(Beijing University of Posts and Telecommunications),Ministry of Education,Beijing 100876,China) |
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| Abstract: | In digital wireless communication systems,to reduce the complexity of channel decoding,the soft information always needs to be intercepted as fix-point information before channel decoding.Up-overflow and down-overflow will be happened during the interception process,and then two kinds of system performance degradation will be occured.Based on joint consideration about these two kinds of overflow,a new adaptive fix-point information interception method is suggested,so that the system performance will show be... |
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| Keywords: | wireless communications soft decoding fix-point simulation overflow superposition coding |
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