Orthogonal Time Frequency Space (OTFS) with Dual-Mode Index Modulation

Hang Zhao; Dongxuan He; Ziqi Kang; Hua Wang

doi:10.1109/LWC.2021.3053981

Orthogonal Time Frequency Space (OTFS) with Dual-Mode Index Modulation

Hang Zhao, Dongxuan He^*, Ziqi Kang, Hua Wang

^*Corresponding author for this work

School of Information and Electronics

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

44 Citations (Scopus)

Abstract

Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.

Original language	English
Article number	9335633
Pages (from-to)	991-995
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	10
Issue number	5
DOIs	https://doi.org/10.1109/LWC.2021.3053981
Publication status	Published - May 2021

Keywords

OTFS
OTFS-DM-IM
dual-mode index modulation
modified log-likelihood ratio detector

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10.1109/LWC.2021.3053981

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title = "Orthogonal Time Frequency Space (OTFS) with Dual-Mode Index Modulation",

abstract = "Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.",

keywords = "OTFS, OTFS-DM-IM, dual-mode index modulation, modified log-likelihood ratio detector",

author = "Hang Zhao and Dongxuan He and Ziqi Kang and Hua Wang",

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AU - Zhao, Hang

AU - He, Dongxuan

AU - Kang, Ziqi

AU - Wang, Hua

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Y1 - 2021/5

N2 - Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.

AB - Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.

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Orthogonal Time Frequency Space (OTFS) with Dual-Mode Index Modulation

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