Parallel Interference Cancellation Technology for F-OFDM under High-Speed Mobility Scenario

doi:10.13190/j.jbupt.2020-236

Journal of Beijing University of Posts and Telecommunications ›› 2021, Vol. 44 ›› Issue (4): 12-18.doi: 10.13190/j.jbupt.2020-236

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Parallel Interference Cancellation Technology for F-OFDM under High-Speed Mobility Scenario

QIN Wei, HU Chun-jing, PENG Mu-gen, LIU Xi-qing

School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2020-11-12 Published:2021-07-13

Abstract

Abstract: The complex propagation environment and high-speed mobility of transceivers in the fifth generation of mobile communications system (5G) can cause severe Doppler spread problem. To suppress the severe inter-carrier interference caused by the Doppler spread, an enhanced parallel interference cancellation scheme based on the filtered orthogonal frequency division multiplex (PIC-F-OFDM) system isproposed. In PIC-F-OFDM, the transmitting data stream is splitted into two brancheswhich are then separately fed into the inverse fast Fourier transform and fast Fourier transform modules. The two branches are then combined by the equal gain combining algorithm at the receiver to improve the signal-to-interference ratio. The simulation results show that PIC-F-OFDM achieves a lower bit error rate than the existing schemes in high-speed mobility scenarios under the 5G radio band. Besides, the proposed PIC-F-OFDM scheme can configure the parameters flexibly for each sub-band, which helps to meet the communication requirements of various service.

Key words: high-speed railway communication, Doppler spread, inter-subcarrier interference, parallel interference cancellation

CLC Number:

TN911.25

QIN Wei, HU Chun-jing, PENG Mu-gen, LIU Xi-qing. Parallel Interference Cancellation Technology for F-OFDM under High-Speed Mobility Scenario[J]. Journal of Beijing University of Posts and Telecommunications, 2021, 44(4): 12-18.

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Parallel Interference Cancellation Technology for F-OFDM under High-Speed Mobility Scenario

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