| MIMO系统中k-best球形译码算法研究 |
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| 引用本文： | 林云,王宇.MIMO系统中k-best球形译码算法研究[J].电波科学学报,2009,24(1). |
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| 作者姓名： | 林云 王宇 |
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| 作者单位： | 重庆邮电大学,通信与信息工程学院,重庆,400065 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金-中物院NSAF联合基金，重庆市自然科学基金CSTC |
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| 摘 要： | 通过对广度优先策略中有恒定复杂度的层排序k-best球译码算法进行分析,提出一种每节点保留可变扩展节点的层排序k-best球形译码算法(k-best SDA Ⅱ),在64QAM调制及每层保留8节点的实数SDA模型下,通过仿真的方法得出了保留恒定扩展节点的k-best SDA当每节点保留扩展节点数大于等于2时,性能基本不变(k-best SDA Ⅰ);而改进的k-best SDA Ⅱ则对k-best SDA Ⅰ在性能与复杂度上作了比较好的折中,前者计算复杂度大约减少了28%,而性能的损失基本可以忽略.
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| 关 键 词： | 多输入多输出 检测算法 球形译码 k-best球形译码算法 |
Study on k-best sphere decoding algorithm in MIMO systems |
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| LIN Yun,WANG Yu.Study on k-best sphere decoding algorithm in MIMO systems[J].Chinese Journal of Radio Science,2009,24(1). |
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| Authors: | LIN Yun WANG Yu |
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| Affiliation: | College of Communication and Information Technology in Chongqing University of Posts and Telecommunications;Chongqin 400065;China |
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| Abstract: | Maximum likelihood detection(MLD) can provide the best performance in minimum bit errors ratio rule in multiple input multiple output(MIMO) system.However,exponentially searching for the ML solution becomes infeasible as the number of antenna and constellation points increases.Thus,the sphere decoding algorithm with the middle searching complexity is regarded extensively as a sub-MLD.In this paper,k-best SDA with fixed complexity,which adopt breath-first search strategy,was analyzed.And a type of k-best SDA... |
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| Keywords: | MIMO detective algorithm sphere decoding k-best SDA |
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