OTFS-IM channel estimation and data detection algorithm with a superimposed pilot pattern

Orthogonal time frequency space modulation (OTFS) has been proved to have better performance over orthogonal frequency division multiplexing (OFDM) under high-mobility environments. In this manuscript, we address the challenging problem of channel estimation in high-mobility scenarios for 5G and bey...

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Bibliographic Details
Published in2023 IEEE Statistical Signal Processing Workshop (SSP) pp. 586 - 590
Main Authors Ouchikh, Rabah, Aissa-El-Bey, Abdeldjalil, Chonavel, Thierry, Djeddou, Mustapha
Format Conference Proceeding
LanguageEnglish
Published IEEE 02.07.2023
Subjects
Bit error rate
Channel estimation
high-mobility
index modulation
Modulation
OFDM
OTFS
Spectral efficiency
Symbols
Time-frequency analysis
time-varying channels
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ISSN2693-3551
DOI10.1109/SSP53291.2023.10207981

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Summary:Orthogonal time frequency space modulation (OTFS) has been proved to have better performance over orthogonal frequency division multiplexing (OFDM) under high-mobility environments. In this manuscript, we address the challenging problem of channel estimation in high-mobility scenarios for 5G and beyond. To improve the spectral efficiency of the system, we combine superimposed pilots with index modulation paradigm. Indeed, we propose an iterative algorithm for channel estimation and symbol detection with superimposed pilot pattern for OTFS-IM systems. The proposed algorithm iterates between LMMSE-based data detection and data-aided channel estimation. Performance in terms of spectral efficiency and bit error rate are evaluated and compared against state-of-the-art methods.
ISSN:2693-3551
DOI:10.1109/SSP53291.2023.10207981