Research on Interference Suppression Algorithm in Reconfigurable Intelligent Surface Environment in ZP-OFDM

ZENG Rong; SHAO Zhimin

doi:10.11999/JEIT211389

Volume 44 Issue 7

Jul. 2022

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ZENG Rong, SHAO Zhimin. Research on Interference Suppression Algorithm in Reconfigurable Intelligent Surface Environment in ZP-OFDM[J]. Journal of Electronics & Information Technology, 2022, 44(7): 2358-2365. doi: 10.11999/JEIT211389

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ZENG Rong, SHAO Zhimin. Research on Interference Suppression Algorithm in Reconfigurable Intelligent Surface Environment in ZP-OFDM[J]. Journal of Electronics & Information Technology, 2022, 44(7): 2358-2365. doi: 10.11999/JEIT211389

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Research on Interference Suppression Algorithm in Reconfigurable Intelligent Surface Environment in ZP-OFDM

doi: 10.11999/JEIT211389

ZENG Rong,
SHAO Zhimin^,

School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China

Funds: The Open Research Foundation of the State Key Laboratory of Mobile Communication, Southeast University (2020D-13), The Open Project of Zhijiang Laboratory (2019LC0AB02)

Received Date: 2021-12-01
Accepted Date: 2022-05-24
Rev Recd Date: 2022-05-11

Available Online: 2022-05-27

Publish Date: 2022-07-25

Abstract

Abstract

Equivalent channel time variation caused by coefficient conversion of reflective elements in Zero Prefix Orthogonal Frequency Division Multiplexing (ZP-OFDM) system in Reconfigurable Intelligent Surface (RIS) scene, it destroys the orthogonality of Orthogonal Frequency Division Multiplexing (OFDM) system and produces serious Inter Carrier Interference (ICI). In this paper, by constructing the system transmission model in this scenario, analyzing the ICI power and modeling the time-varying characteristics of the coefficient conversion of the reflection element, the ICI is compensated by constructing the inter subcarrier interference suppression matrix to suppress the impact of the equivalent time-varying channel caused by the change of reflection coefficient on the system performance. The simulation results show that the inter subcarrier interference is effectively suppressed, and the interference suppression algorithm proposed in this paper can significantly improve the transmission performance of the system.

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References(22)

References

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