Performance Analysis and Approximate Message Passing Detection of Orthogonal Time Sequency Multiplexing Modulation

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Performance Analysis and Approximate Message Passing Detection of Orthogonal Time Sequency Multiplexing Modulation
Title:
Performance Analysis and Approximate Message Passing Detection of Orthogonal Time Sequency Multiplexing Modulation
Journal Title:
IEEE Transactions on Wireless Communications
Publication Date:
13 July 2023
Citation:
Sui, Z., Yan, S., Zhang, H., Sun, S., Zeng, Y., Yang, L.-L., & Hanzo, L. (2023). Performance Analysis and Approximate Message Passing Detection of Orthogonal Time Sequency Multiplexing Modulation. IEEE Transactions on Wireless Communications, 1–1. https://doi.org/10.1109/twc.2023.3293315
Abstract:
In orthogonal time sequency multiplexing (OTSM) modulation, the information symbols are conveyed in the delaysequency domain upon exploiting the inverse Walsh Hadamard transform (IWHT). It has been shown that OTSM is capable of attaining a bit error ratio (BER) similar to that of orthogonal time-frequency space (OTFS) modulation at a lower complexity, since the saving of multiplication operations in the IWHT. Hence we provide its BER performance analysis and characterize its detection complexity. We commence by deriving its generalized input-output relationship and its unconditional pairwise error probability (UPEP). Then, its BER upper bound is derived in closed form under both ideal and imperfect channel estimation conditions, which is shown to be tight at moderate to high signal-to-noise ratios (SNRs). Moreover, a novel approximate message passing (AMP) aided OTSM detection framework is proposed. Specifically, to circumvent the high residual BER of the conventional AMP detector, we proposed a vector AMP-based expectation-maximization (VAMP-EM) detector for performing joint data detection and noise variance estimation. The variance auto-tuning algorithm based on the EM algorithm is designed for the VAMP-EM detector to further improve the convergence performance. The simulation results illustrate that the VAMPEM detector is capable of striking an attractive BER vs. complexity trade-off than the state-of-the-art schemes as well as providing a better convergence. Finally, we propose AMP and VAMP-EM turbo receivers for low-density parity-check (LDPC)-coded OTSM systems. It is demonstrated that our proposed VAMP-EM turbo receiver is capable of providing both BER and convergence performance improvements over the conventional AMP solution.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the National Research Foundation, Singapore and Infocomm Media Development Authority - Future Communications Research & Development Programme.
Grant Reference no. : FCP-NUS-RG-2022-018
Description:
© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
ISSN:
1558-2248
1536-1276
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