| 空间分集干扰对齐研究 |
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| 引用本文： | 王勤民,张忠培,刘明,结凤克.空间分集干扰对齐研究[J].系统工程与电子技术,2013,35(1):179-183. |
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| 作者姓名： | 王勤民 张忠培 刘明 结凤克 |
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| 作者单位： | 1.电子科技大学通信抗干扰技术国家重点实验室， 四川 成都 611731；
2.信息工程大学信息系统工程学院， 河南 郑州 450001 |
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| 基金项目： | 国家自然科学基金(61101092);国家重大科研专项(2012ZX03001027-001)资助课题 |
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| 摘 要： | 干扰对齐(interference alignment, IA)通过在接收端把干扰对齐到同一个子空间中，可以在干扰信道中实现最大的自由度，但在低信噪比时，IA可靠性较差，针对这个问题，研究了实现分集IA的条件，提出了基于子空间投影的单端分集及双端分集的具体实现方案。通过理论分析和仿真验证阐述了分集对改善IA性能的机理，给出了IA中分集与复用的折中方案。分集能提高IA的接收信噪比，减小差错概率,从而改善IA在低信噪比时的性能。最后,通过仿真验证了分集IA的性能。
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| 关 键 词： | 无线网络 干扰抑制 干扰对齐 分集 子空间投影 |
Research on spatial diversity interference alignment |
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| WANG Qin-min,HANG Zhong-pei,LIU Ming,JIE Feng-ke.Research on spatial diversity interference alignment[J].System Engineering and Electronics,2013,35(1):179-183. |
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| Authors: | WANG Qin-min HANG Zhong-pei LIU Ming JIE Feng-ke |
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| Institution: | 1. National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China; 2.Information System Engineering Institute, Information Engineering University, Zhengzhou 450001, China |
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| Abstract: | Interference alignment (IA) can achieve maximum degree of freedom in interference channal by aligning all the interference into an identical subspace at the receive side. IA degrades the reliability under the condition of low signal to noise ratio (SNR). After analyzing conditions of the diversity IA, the feasible schemes for implementing one side and two side diversity based on subspace projection are proposed. The impact mechanism of diversity on IA is presented by theoretic analysis and simulations. The comparison of diversity and multiplexing for IA is presented. Diversity can improve the received SNR of IA and lower the error probability, which improves the performance of IA at low SNR. Finally, the performance of IA is verified by simulations. |
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| Keywords: | wireless networks interference suppression interference alignment (IA) diversity subspace projection |
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