Gaussian approximate message passing detection of orthogonal time frequency space modulation
Gaussian approximate message passing detection of orthogonal time frequency space modulation
Message passing (MP) aided detectors are designed for orthogonal time frequency space (OTFS) modulated system. We first characterize the transmit-receive relationship of our OTFS-modulated system in the delay-Doppler (DD) domain by designing a joint factor graph. Based on this joint factor graph, we then conceive a joint message passing aided (JMPA) detector. Furthermore, a novel low-complexity Gaussian approximate MP (GA-MP) detector is also conceived, which models the a posteriori probabilities propagated through the proposed joint factor graph by Gaussian distributions. Finally, we demonstrate that the proposed GA-MP detector outperforms the state-of-the-art MP detector by at least 1.5 dB at a bit error ratio (BER) of 10^{-4}, while keeping the same complexity order.
OTFS modulation, message passing
10999-11004
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
1 October 2021
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Xiang, Luping, Liu, Yusha, Yang, Lie-Liang and Hanzo, Lajos
(2021)
Gaussian approximate message passing detection of orthogonal time frequency space modulation.
IEEE Transactions on Vehicular Technology, 70 (10), .
(doi:10.1109/TVT.2021.3102673).
Abstract
Message passing (MP) aided detectors are designed for orthogonal time frequency space (OTFS) modulated system. We first characterize the transmit-receive relationship of our OTFS-modulated system in the delay-Doppler (DD) domain by designing a joint factor graph. Based on this joint factor graph, we then conceive a joint message passing aided (JMPA) detector. Furthermore, a novel low-complexity Gaussian approximate MP (GA-MP) detector is also conceived, which models the a posteriori probabilities propagated through the proposed joint factor graph by Gaussian distributions. Finally, we demonstrate that the proposed GA-MP detector outperforms the state-of-the-art MP detector by at least 1.5 dB at a bit error ratio (BER) of 10^{-4}, while keeping the same complexity order.
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final
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Accepted/In Press date: 3 August 2021
Published date: 1 October 2021
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Publisher Copyright:
© 1967-2012 IEEE.
Keywords:
OTFS modulation, message passing
Identifiers
Local EPrints ID: 450861
URI: http://eprints.soton.ac.uk/id/eprint/450861
ISSN: 0018-9545
PURE UUID: 3d83f94c-81c7-4437-988d-5fd5eca36621
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Date deposited: 16 Aug 2021 16:49
Last modified: 13 Dec 2024 02:36
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