Successive Interference Cancellation Aided Bidirectional Soft Decision Feedback Equalization for OTFS Systems

Zihao Ye; Shefeng Yan; Zeping Sui; Hongming Zhang; Sumei Sun

doi:10.1109/LWC.2023.3305002

Successive Interference Cancellation Aided Bidirectional Soft Decision Feedback Equalization for OTFS Systems

Zihao Ye, Shefeng Yan^*, Zeping Sui, Hongming Zhang, Sumei Sun

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Soft decision feedback equalization (SDFE) paradigms are conceived for the orthogonal time frequency space (OTFS) modulation in this letter. The proposed schemes are performed by reconstructing the delay-Doppler (DD)-banded channel matrix, while the successive interference cancellation (SIC) and soft decision feedback techniques are exploited for mitigating inter-symbol interference (ISI). Moreover, the SDFE is beneficially amalgamated with the bidirectional structure, yielding the bidirectional SDFE (Bi-SDFE). Explicitly, by combining the forward and backward SDFEs' outputs, the proposed Bi-SDFE is capable of attaining both bidirectional diversity and error propagation mitigation. It is demonstrated that the convergence-enhanced Bi-SDFE can attain a better bit error ratio (BER) performance compared to some existing solutions.

Original language	English
Pages (from-to)	2028-2032
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	12
Issue number	12
DOIs	https://doi.org/10.1109/LWC.2023.3305002
Publication status	Published - 1 Dec 2023
Externally published	Yes

Keywords

OTFS modulation
bidirectional equalizer
soft decision feedback
successive interference cancellation

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10.1109/LWC.2023.3305002

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Ye, Z., Yan, S., Sui, Z., Zhang, H., & Sun, S. (2023). Successive Interference Cancellation Aided Bidirectional Soft Decision Feedback Equalization for OTFS Systems. IEEE Wireless Communications Letters, 12(12), 2028-2032. https://doi.org/10.1109/LWC.2023.3305002

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abstract = "Soft decision feedback equalization (SDFE) paradigms are conceived for the orthogonal time frequency space (OTFS) modulation in this letter. The proposed schemes are performed by reconstructing the delay-Doppler (DD)-banded channel matrix, while the successive interference cancellation (SIC) and soft decision feedback techniques are exploited for mitigating inter-symbol interference (ISI). Moreover, the SDFE is beneficially amalgamated with the bidirectional structure, yielding the bidirectional SDFE (Bi-SDFE). Explicitly, by combining the forward and backward SDFEs' outputs, the proposed Bi-SDFE is capable of attaining both bidirectional diversity and error propagation mitigation. It is demonstrated that the convergence-enhanced Bi-SDFE can attain a better bit error ratio (BER) performance compared to some existing solutions.",

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author = "Zihao Ye and Shefeng Yan and Zeping Sui and Hongming Zhang and Sumei Sun",

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Successive Interference Cancellation Aided Bidirectional Soft Decision Feedback Equalization for OTFS Systems

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Keywords

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