| 基于空时编码和干扰对齐的干扰消除方法 |
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| 引用本文： | 孙江峰,田心记. 基于空时编码和干扰对齐的干扰消除方法[J]. 计算机科学, 2015, 42(10): 122-125 |
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| 作者姓名： | 孙江峰 田心记 |
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| 作者单位： | 河南理工大学计算机科学与技术学院 焦作454004,河南理工大学计算机科学与技术学院 焦作454004 |
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| 基金项目： | 本文受河南省高等学校矿山信息化重点学科开放实验室开放基金(KZ2012-03)资助 |
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| 摘 要： | 对于每个用户配置4根天线的X信道,提出了一种基于空时编码和干扰对齐的干扰消除方法。设计了4×4的速率为2的空时码字,并且在码字中引入零向量。首先通过干扰对齐将每个接收端接收到的非期望接收码字对齐,然后对接收信号进行线性操作以消除非期望接收的码字,最后对接收信号进行非线性运算使得期望接收的码字互不干扰。所提方案的自由度为16/3,分集增益为8。仿真结果显示,所提方案的可靠性优于相同场景中的已有方案。
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| 关 键 词： | X信道 空时编码 干扰对齐 自由度 分集增益 |
| 收稿时间： | 2014-10-24 |
| 修稿时间： | 2015-01-02 |
Interference Cancellation Method Based on Space-time Code and Interference Alignment |
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| SUN Jiang-feng and TIAN Xin-ji. Interference Cancellation Method Based on Space-time Code and Interference Alignment[J]. Computer Science, 2015, 42(10): 122-125 |
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| Authors: | SUN Jiang-feng and TIAN Xin-ji |
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| Affiliation: | School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo 454004,China and School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo 454004,China |
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| Abstract: | An interference cancellation method based on space-time code and interference alignment was proposed for X channel with four antennas of each user.4×4 space-time codeword with coding rate being 2 was designed,and zero vectors were introduced into each codeword.Firstly,the unwanted codewords for each receiver are aligned by interference alignment.Then,the unwanted codewords are mitigated by linear operation on received signals.Finally,the wanted codewords are not interfering with each other by non-linear operation on received signals.The sum degrees of freedom and the diversity gain are 16/3 and 8 respectively.Simulation results show that the reliability of proposed scheme outperforms the existing scheme at the same scene. |
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| Keywords: | X channel Space-time code Interference alignment Degrees of freedom Diversity gain |
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