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简化的固定复杂度球型译码算法

A Simplified Fix-Complexity Sphere Decoding
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摘要 提出一种适用于多输入多输出通信系统的简化的固定复杂度球型译码算法.研究多天线接收信号的概率分布,根据接收信号满足卡方分布的特性,提出利用累计分布函数,结合检测错误上限,确定裁剪半径,将检测过程中大于该裁剪半径的节点裁剪掉.仿真结果表明,简化的固定复杂度球型译码算法在高信噪比的情况下,可以有效降低计算复杂度. A further simply the calculation complexity of the fixed-complexity sphere decoding（ FSD）was proposed for the multiple-input-multiple-output（ MIMO） system. By exploiting the channel noise probability distribution,a threshold determined by the upper bound of the symbol error ratio and cumulative distribution function of Chi-squared distribution can be set to cut nodes with larger metrics. Simulation results show that the proposed algorithm drops the complexity efficiently.
作者 毛新宇 范伟亮 王志军
机构地区 北京大学信息科学技术学院
出处 《北京邮电大学学报》 EI CAS CSCD 北大核心 2015年第4期15-18,共4页 Journal of Beijing University of Posts and Telecommunications
基金 国家高技术研究发展计划(863计划)项目(2014AA01A704) 国家自然科学基金项目(61471405)
关键词 多天线系统 固定复杂度 球型译码算法 裁剪半径 multiple-input-multiple-output system fixed-complexity sphere decoding cut radius
分类号 TN911.7 [电子电信—通信与信息系统]
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参考文献14

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北京邮电大学学报
2015年 第4期

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