Robust Interference Alignment Algorithm Based on QR Decomposition

Xie Xian-zhong; Zhang Sen-lin; Xiao Zheng-ying

doi:10.11999/JEIT141585

Volume 37 Issue 8

Aug. 2015

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Xie Xian-zhong, Zhang Sen-lin, Xiao Zheng-ying. Robust Interference Alignment Algorithm Based on QR Decomposition[J]. Journal of Electronics & Information Technology, 2015, 37(8): 1957-1963. doi: 10.11999/JEIT141585

Citation:

Xie Xian-zhong, Zhang Sen-lin, Xiao Zheng-ying. Robust Interference Alignment Algorithm Based on QR Decomposition[J]. Journal of Electronics & Information Technology, 2015, 37(8): 1957-1963. doi: 10.11999/JEIT141585

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Robust Interference Alignment Algorithm Based on QR Decomposition

doi: 10.11999/JEIT141585

Received Date: 2014-12-11
Rev Recd Date: 2015-04-20
Publish Date: 2015-08-19

Abstract

Abstract

Most interference alignment algorithms assume that the senders know perfect Channel State Information (CSI), but in practical communication systems, due to the channel estimation error, the delayed feedback and so on, the CSI often exists the error. Therefore, a robust interference alignment algorithm is presented based on the QR decomposition. Firstly, the QR is used to preprocess the jointly received signal with the of error for eliminating half of the interference terms. Then this paper minimizes the interference power from the sender to the other receivers to design the pre-coding matrix, and utilizes Minimum Mean Square Error (MMSE) criterion to design the interference suppression matrix. Finally, under the conditions of perfect CSI and error CSI, the simulation results verify that the proposed algorithm improves effectively the performance of the system.
- Wireless communication,
- Robust interference alignment,
- Channel estimation error,
- QR decomposition,
- Performance of system

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References(17)

References

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