A Novel Block-Wise Index Modulation Scheme for High-Mobility OTFS Communications

As a promising technique for high-mobility wireless communications, orthogonal time frequency space (OTFS) has been proved to enjoy excellent advantages with respect to traditional orthogonal frequency division multiplexing (OFDM). However, a challenging problem is to design efficient systems to fur...

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Bibliographic Details
Published inIEEE/CIC International Conference on Communications in China - Workshops (Online) pp. 337 - 341
Main Authors Qian, Mi, Get, Yao, Wen, Miaowen, Ji, Fei
Format Conference Proceeding
LanguageEnglish
Published IEEE 11.08.2022
Subjects
diversity order
Fading channels
index modulation
Message passing
message passing algorithm
Modulation
OFDM
OTFS modulation
Simulation
Time-frequency analysis
Wireless communication
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ISSN2474-9133
DOI10.1109/ICCCWorkshops55477.2022.9896644

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Summary:As a promising technique for high-mobility wireless communications, orthogonal time frequency space (OTFS) has been proved to enjoy excellent advantages with respect to traditional orthogonal frequency division multiplexing (OFDM). However, a challenging problem is to design efficient systems to further improve the performance. In this paper, we propose a novel block-wise index modulation (IM) scheme for OTFS systems, named Doppler-IM with OTFS (DoIM-OTFS), where a block of Doppler resource bins are activated simultaneously. For practical implementation, we develop a low complexity customized message passing (CMP) algorithm for our proposed DoIM-OTFS scheme. Simulation results demonstrate our proposed DoIM-OTFS system outperforms traditional OTFS system without IM. The proposed CMP algorithm can achieve desired performance and robustness to the imperfect channel state information (CSI).
ISSN:2474-9133
DOI:10.1109/ICCCWorkshops55477.2022.9896644