@inproceedings{7ee1b6695cf34e17a49f2eeaffcec4c2,
title = "Multiple-Input Multiple-Output AFDM with Index Modulation",
abstract = "In high-mobility scenarios, affine frequency division multiplexing with index modulation (AFDM-IM) has attracted significant attention due to its ability to convey information by combining active subcarrier indices with constellation symbols. Motivated by the spatial multiplexing concept in multiple-input multiple-output (MIMO) systems, in this paper, we propose the MIMO-AFDM-IM scheme to enhance spectral efficiency (SE) and bit error rate (BER) performance. Three detection methods are introduced to address the exponential complexity of Maximum Likelihood (ML) detection in MIMO-AFDM-IM. These methods aim to strike a balance between detection accuracy and computational complexity. Additionally, the average bit error probability (ABEP) of the MIMO-AFDM-IM scheme is derived to assess its performance. Computer simulations are carried out under time-varying multipath conditions, and the results demonstrate the superiority of the proposed MIMO-AFDM-IM over MIMOAFDM and AFDM-IM across various system configurations.",
keywords = "AFDM, DAFT domain, doubly dispersive channels, index modulation, MIMO systems",
author = "Ruiqi Cao and Yanqun Tang and Tianqi Mao and Muzi Yuan and Yuqing Liu and Hongjie Bao and Haibo Chen",
note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 36th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2025 ; Conference date: 01-09-2025 Through 04-09-2025",
year = "2025",
doi = "10.1109/PIMRC62392.2025.11275321",
language = "English",
series = "IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2025",
address = "United States",
}