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

XIE Xianzhong; WANG Chuang; LEI Weijia; LAN Shunfu

doi:10.11999/JEIT150791

Volume 38 Issue 5

May 2016

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Article Navigation > Journal of Electronics & Information Technology > 2016 > 38(5): 1186-1193

XIE Xianzhong, WANG Chuang, LEI Weijia, LAN Shunfu. A Self-interference Cancellation and Interference Alignment Algorithm for Full-duplex Relay Networks with Maximum Mutual Information and Low Complexity[J]. Journal of Electronics & Information Technology, 2016, 38(5): 1186-1193. doi: 10.11999/JEIT150791

Citation:

XIE Xianzhong, WANG Chuang, LEI Weijia, LAN Shunfu. A Self-interference Cancellation and Interference Alignment Algorithm for Full-duplex Relay Networks with Maximum Mutual Information and Low Complexity[J]. Journal of Electronics & Information Technology, 2016, 38(5): 1186-1193. doi: 10.11999/JEIT150791

Citation:

XIE Xianzhong, WANG Chuang, LEI Weijia, LAN Shunfu. A Self-interference Cancellation and Interference Alignment Algorithm for Full-duplex Relay Networks with Maximum Mutual Information and Low Complexity[J]. Journal of Electronics & Information Technology, 2016, 38(5): 1186-1193. doi: 10.11999/JEIT150791

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

doi: 10.11999/JEIT150791

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

Received Date: 2015-07-01
Rev Recd Date: 2016-02-22
Publish Date: 2016-05-19

Abstract

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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References(14)

References

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