Novel Interference Alignment Scheme Based on Dynamic Feedback and Power Allocation

LI Shibao; HE Chang; LIU Jianhang; WANG Yixin

doi:10.11999/JEIT170505

Volume 40 Issue 3

Mar. 2018

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Article Navigation > Journal of Electronics & Information Technology > 2018 > 40(3): 728-733

LI Shibao, HE Chang, LIU Jianhang, WANG Yixin. Novel Interference Alignment Scheme Based on Dynamic Feedback and Power Allocation[J]. Journal of Electronics & Information Technology, 2018, 40(3): 728-733. doi: 10.11999/JEIT170505

Citation:

LI Shibao, HE Chang, LIU Jianhang, WANG Yixin. Novel Interference Alignment Scheme Based on Dynamic Feedback and Power Allocation[J]. Journal of Electronics & Information Technology, 2018, 40(3): 728-733. doi: 10.11999/JEIT170505

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Novel Interference Alignment Scheme Based on Dynamic Feedback and Power Allocation

doi: 10.11999/JEIT170505

Funds:

The National Natural Science Foundation of China (61601519), The Shandong Provincial Natural Science Foundation (ZR2014FM017, ZR2016FL02), The Fundamental Research Funds for the Central Universities (18CX02134A, 18CX02137A)

Received Date: 2017-05-26
Rev Recd Date: 2017-11-29
Publish Date: 2018-03-19

Abstract

Abstract

In multi-user MIMO systems, the accuracy of the Channel State Information (CSI) has a sufficient effect on performance of interference alignment scheme. To solve the problem of interference leakage caused by limited feedback of CSI, a novel method for interference alignment based on dynamic feedback and power allocation is proposed. First, the relationship between system sum rate and the allocation for channel state feedback bits and transmitting power is analyzed theoretically, and the formula of sum rate of the system considering dynamic feedback and power allocation is derived. Based on the above analysis, the model of optimizing allocation for feedback bits and power problem is set to improve the throughput of system. Then, a low-complexity solution to the problem is raised on the basis of channel quasi-static characteristic, and the feedback bit and power allocation scheme are obtained by the Karush-Kuhn-Tucker (KKT) condition. Simulation results show that the proposed method can effectively reduce the interference leakage and improve the system sum rate compared with the interference alignment scheme that just dynamically feedbacks channel state.
- MIMO,
- Interference alignment,
- Limited feedback,
- Dynamic feedback,
- Power allocation

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References(20)

References

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