Sui, Zeping and Liu, Zilong and Musavian, Leila and Yang, Lie-Liang and Hanzo, Lajos (2025) Generalized Spatial Modulation Aided Affine Frequency Division Multiplexing. IEEE Transactions on Wireless Communications. p. 1. DOI https://doi.org/10.1109/twc.2025.3613062 (In Press)
Sui, Zeping and Liu, Zilong and Musavian, Leila and Yang, Lie-Liang and Hanzo, Lajos (2025) Generalized Spatial Modulation Aided Affine Frequency Division Multiplexing. IEEE Transactions on Wireless Communications. p. 1. DOI https://doi.org/10.1109/twc.2025.3613062 (In Press)
Sui, Zeping and Liu, Zilong and Musavian, Leila and Yang, Lie-Liang and Hanzo, Lajos (2025) Generalized Spatial Modulation Aided Affine Frequency Division Multiplexing. IEEE Transactions on Wireless Communications. p. 1. DOI https://doi.org/10.1109/twc.2025.3613062 (In Press)
Abstract
Generalized spatial modulation-aided affine frequency division multiplexing (GSM-AFDM) is conceived for reliable multiple-input multiple-output (MIMO) communications over doubly selective channels. We commence by proposing several low-complexity detectors for large-scale GSM-AFDM systems to meet the diverse requirements of heterogeneous receiver designs in terms of detection complexity and reliability. Specifically, we introduce the linear minimum mean square error (LMMSE) equalizer-based maximum likelihood detector (LMMSE-MLD). By exploiting the GSM properties, we then derive the LMMSE-based transmitantenna activation pattern (TAP) check-based log-likelihood ratio detector (LMMSE-TC-LLRD). In addition, we propose a pair of new detectors, namely the greedy residual check detector (GRCD) and the reduced space check detector (RSCD). We also derive a bit error rate (BER) upper-bound by considering the MLD. Our analytical results are also available for multiple-input multiple-output (MIMO)-AFDM, since MIMO-AFDM can be regarded as a specical case of the proposed GSM-AFDM. Our simulation results demonstrate that 1) the BER upper bound derived is tight for moderate to high signal-to-noise ratios (SNRs), 2) the proposed GSMAFDM achieves lower BER than its conventional orthogonal frequency division multiplexing (OFDM), orthogonal time frequency space (OTFS) and AFDM counterparts. Specifically, at a BER of 10‾⁴ and a velocity of 540 km/h, the proposed GSM-AFDM is capable of attaining about 6 dB SNR gain compared to GSM-OFDM, and 3) the conceived detectors strike a compelling trade-off between the BER and complexity.
Item Type: | Article |
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Uncontrolled Keywords: | Affine frequency division multiplexing (AFDM); generalized spatial modulation (GSM); lowcomplexity detection; orthogonal time frequency space (OTFS); performance analysis |
Subjects: | Z Bibliography. Library Science. Information Resources > ZR Rights Retention |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Computer Science and Electronic Engineering, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 01 Oct 2025 15:02 |
Last Modified: | 02 Oct 2025 16:26 |
URI: | http://repository.essex.ac.uk/id/eprint/41675 |
Available files
Filename: GSM_AFDM.pdf
Licence: Creative Commons: Attribution 4.0