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

^*此作品的通讯作者

CAS - Institute of Acoustics
School of Electronic
University of Chinese Academy of Sciences
School of Information and Communication Engineering
Beijing University of Posts and Telecommunications
and Research (A*STAR)

科研成果: 期刊稿件 › 文章 › 同行评审

13 引用（Scopus）

摘要

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.

源语言	英语
页（从-至）	2028-2032
页数	5
期刊	IEEE Wireless Communications Letters
卷	12
期	12
DOI	https://doi.org/10.1109/LWC.2023.3305002
出版状态	已出版 - 1 12月 2023
已对外发布	是

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title = "Successive Interference Cancellation Aided Bidirectional Soft Decision Feedback Equalization for OTFS Systems",

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.",

keywords = "OTFS modulation, bidirectional equalizer, soft decision feedback, successive interference cancellation",

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

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T1 - Successive Interference Cancellation Aided Bidirectional Soft Decision Feedback Equalization for OTFS Systems

AU - Ye, Zihao

AU - Yan, Shefeng

AU - Sui, Zeping

AU - Zhang, Hongming

AU - Sun, Sumei

PY - 2023/12/1

Y1 - 2023/12/1

N2 - 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.

AB - 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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KW - bidirectional equalizer

KW - soft decision feedback

KW - successive interference cancellation

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

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