Cascade Interference Alignment Algorithm for Ambient Backscatter Cellular Networks Downlink

LI Shibao; WANG Xiaoli; SUN Mingyu; LI Quanyu; CUI Xuerong; LIU Jianhang

doi:10.11999/JEIT221534

Volume 45 Issue 7

Jul. 2023

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Article Navigation > Journal of Electronics & Information Technology > 2023 > 45(7): 2342-2349

LI Shibao, WANG Xiaoli, SUN Mingyu, LI Quanyu, CUI Xuerong, LIU Jianhang. Cascade Interference Alignment Algorithm for Ambient Backscatter Cellular Networks Downlink[J]. Journal of Electronics & Information Technology, 2023, 45(7): 2342-2349. doi: 10.11999/JEIT221534

Citation:

LI Shibao, WANG Xiaoli, SUN Mingyu, LI Quanyu, CUI Xuerong, LIU Jianhang. Cascade Interference Alignment Algorithm for Ambient Backscatter Cellular Networks Downlink[J]. Journal of Electronics & Information Technology, 2023, 45(7): 2342-2349. doi: 10.11999/JEIT221534

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Cascade Interference Alignment Algorithm for Ambient Backscatter Cellular Networks Downlink

doi: 10.11999/JEIT221534

1.
College of Oceanography and Space Informatics, China University of Petroleum (East China), Qingdao 266580, China
2.
College of Computer Science and Technology, China University of Petroleum (East China), Qingdao 266580, China

Funds: The National Natural Science Foundation of China (61972417, 61902431), The Natural Science Foundation of Shandong Province (ZR2020MF005)

Received Date: 2022-12-12
Rev Recd Date: 2023-05-30

Available Online: 2023-06-09

Publish Date: 2023-07-10

Abstract

Abstract

Ambient backscatter cellular network can support both cellular communication and ambient backscatter communication, which has a broad application prospect, but there is serious interference between ambient backscatter signals and cellular network signals. To solve this problem, a Cascade Interference Alignment (CIA) algorithm for ambient backscatter cellular networks is proposed. In order to align the interference of base station signals to reader and users, a two-tier precoding matrix is designed. Considering the limitation that the computing capacity of the backscatter node is weak and it can not design the precoding matrix independently, the backscatter signal is pre-coded by combining the channel state information from the base station to the backscattering device. A two-tier interference suppressing matrix for users and a three-tier interference suppressing matrix for reader are designed to eliminate the interference from different sources. The simulation results show that the proposed algorithm can eliminate the complex interference in the ambient backscattering cellular network, ensure the normal transmission of the cellular network signal and backscattering signal, and provide the better sum rate performance.
- Cellular networks,
- Backscatter,
- Interference alignment

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References(22)

References

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