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Volume 14
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10.3390/electronics14030521
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Iterative Maximum Ratio Combining Detector for Satellite Multiple-Input Multiple-Output/Orthogonal Time–Frequency Space Systems Based on Soft-Symbol Interference Cancelation

by
Meng Sun
1,2,3,
Qi Zhang
1,2,3,4,*,
Haipeng Yao
5,
Ran Gao
6,
Jiayuan Li
1,2,3,
Weiying Feng
7,
Fu Wang
1,
Xiaohu Li
7,
Xiangyu Liu
8,
Feng Tian
1,
Qinghua Tian
1,
Yi Zhao
8,
Liang Liu
9 and
Yuqi Wang
9
1
School of Electronic Engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China
2
State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China
3
Beijing Key Laboratory of Space-Ground Interconnection and Convergence, Beijing 100876, China
4
Science and Technology on Information Systems Engineering Laboratory, National University of Defense Technology, Changsha 410073, China
5
School of Information and Communication Engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China
6
School of Information and Electronics, Beijing Institution of Technology, Beijing 100081, China
7
School of Space and Environment, Beihang University, Beijing, 100191, China
8
Beijing Institute of Control and Electronic Technology, Beijing 100038, China
9
Institute of Telecommunication and Navigation Satellites, Beijing 100094, China
*
Author to whom correspondence should be addressed.
Electronics 2025, 14(3), 521; https://doi.org/10.3390/electronics14030521
Submission received: 22 December 2024 / Revised: 19 January 2025 / Accepted: 21 January 2025 / Published: 27 January 2025
Versions Notes

Abstract

Orthogonal time–frequency space (OTFS) modulation combined with massive multiple-input multiple-output (MIMO) can simultaneously address the problems caused by multipath delay, the Doppler effect, and channel fading. To mitigate inter-subcarrier and inter-symbol interference in satellite–terrestrial MIMO-OTFS systems, an iterative maximum ratio combining detection algorithm based on hard-decision interference cancelation (ICH-IMRC) is proposed. The signal detection is iterated by performing MRC on the interference-canceled received symbols. To mitigate the error spread in the interference cancelation process, iterative maximum ratio combining detection based on soft symbol interference cancelation (S-IMRC) is proposed, which is improved based on ICH-IMRC. The interference cancelation is updated by the expectation of other symbols, and the expectation and variance of symbols are updated by soft judgment with the posterior probability of symbols. To improve the detection convergence speed, optimal relaxation parameters are obtained based on the Sparrow Search Algorithm (SSA). Simulation results show that the proposed S-IMRC has superior error rate performance compared to the conventional algorithms for satellite–terrestrial MIMO-OTFS systems. Furthermore, the proposed algorithm is applicable to various satellite channel models and achieves excellent BER for different orders of orthogonal amplitude-modulated signals and different antenna array sizes.
Keywords: satellite networks; MIMO; OTFS; MRC; SSA satellite networks; MIMO; OTFS; MRC; SSA

Share and Cite

MDPI and ACS Style

Sun, M.; Zhang, Q.; Yao, H.; Gao, R.; Li, J.; Feng, W.; Wang, F.; Li, X.; Liu, X.; Tian, F.; et al. Iterative Maximum Ratio Combining Detector for Satellite Multiple-Input Multiple-Output/Orthogonal Time–Frequency Space Systems Based on Soft-Symbol Interference Cancelation. Electronics 2025, 14, 521. https://doi.org/10.3390/electronics14030521

AMA Style

Sun M, Zhang Q, Yao H, Gao R, Li J, Feng W, Wang F, Li X, Liu X, Tian F, et al. Iterative Maximum Ratio Combining Detector for Satellite Multiple-Input Multiple-Output/Orthogonal Time–Frequency Space Systems Based on Soft-Symbol Interference Cancelation. Electronics. 2025; 14(3):521. https://doi.org/10.3390/electronics14030521

Chicago/Turabian Style

Sun, Meng, Qi Zhang, Haipeng Yao, Ran Gao, Jiayuan Li, Weiying Feng, Fu Wang, Xiaohu Li, Xiangyu Liu, Feng Tian, and et al. 2025. "Iterative Maximum Ratio Combining Detector for Satellite Multiple-Input Multiple-Output/Orthogonal Time–Frequency Space Systems Based on Soft-Symbol Interference Cancelation" Electronics 14, no. 3: 521. https://doi.org/10.3390/electronics14030521

APA Style

Sun, M., Zhang, Q., Yao, H., Gao, R., Li, J., Feng, W., Wang, F., Li, X., Liu, X., Tian, F., Tian, Q., Zhao, Y., Liu, L., & Wang, Y. (2025). Iterative Maximum Ratio Combining Detector for Satellite Multiple-Input Multiple-Output/Orthogonal Time–Frequency Space Systems Based on Soft-Symbol Interference Cancelation. Electronics, 14(3), 521. https://doi.org/10.3390/electronics14030521

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