互信息量最大化和低复杂度的全双工中继网络自干扰消除和干扰对齐算法

谢显中; 王闯; 雷维嘉; 兰顺福

doi:10.11999/JEIT150791

互信息量最大化和低复杂度的全双工中继网络自干扰消除和干扰对齐算法

doi: 10.11999/JEIT150791

基金项目:

国家自然科学基金(61271259, 61471076)，重庆市教委科学技术研究项目(KJ120501, KJ130536)，长江学者和创新团队发展计划(IRT1299)，重庆市科委重点实验室专项经费(CSTC)

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出版历程
- 收稿日期: 2015-07-01
- 修回日期: 2016-02-22
- 刊出日期: 2016-05-19

A Self-interference Cancellation and Interference Alignment Algorithm for Full-duplex Relay Networks with Maximum Mutual Information and Low Complexity

Funds:

The National Nature Science Foundation of China (61271259, 61471076), Scientific and Technological Research Program of Chongqing Education Commission (KJ120501, KJ130536), Changjiang Scholars and Innovative Research Team (IRT1299), Special funds of Key Laboratory of Chongqing Science and Technology Committee

摘要

摘要: 该文针对多用户全双工中继干扰信道，同时考虑全双工中继自干扰消除及用户端干扰消除问题。首先，提出了基于最大化全局互信息量的自干扰消除和干扰对齐算法，并具体给出了自干扰消除矩阵的具体求解算法和方案。进一步，给出了信号对齐和干扰抑制的可行性条件，并分析了系统的互信息量和所受干扰噪声功率，以及系统的自由度。理论分析和仿真结果显示，与现有的典型全双工中继方案相比，该文算法可以提高系统互信息量和自由度，并有较低误码率；另外，该文算法的中继只需进行简单的功率约束，不需做复杂的信号处理，降低了整个系统的信号处理复杂度。
- 全双工中继 /
- 自干扰消除 /
- 干扰对齐 /
- 全局互信息量 /
- 自由度
Abstract: This paper considers a multi-user full-duplex relay interference channel where self- interference and user interference exist. Firstly, a self-interference cancellation and interference alignment algorithm based on maximum global mutual information is proposed, and then the concrete algorithm and scheme of self-interference cancellation matrix is given. Furthermore, this paper investigates the feasibility conditions of the signal alignment and interference suppression, so as to analyze the mutual information, the interference plus noise power and the degree of freedom of the system. Theoretical analysis and simulation results show that the proposed algorithm can improve the mutual information and the degree of freedom of the system, and reduce the bit error rate compared with the existing typical full-duplex relay scheme. In addition, the relay only needs to do simple power constraints, and it is not necessary to do complex signal processing which reduces the complexity of signal processing for the whole system.
- Full-duplex relay /
- Self-interference cancellation /
- Interference alignment /
- Global mutual information /
- Degree of freedom

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参考文献(14)

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