TY - GEN
T1 - Optimal Element Spacing for RIS-aided MIMO Terahertz Communication
AU - Matemu, Arnold
AU - Kim, Dong Ho
AU - Lee, Kyungchun
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - In conventional multiple-input multiple-output (MIMO) systems, the antenna elements at the transmitter, receiver, and the reflecting elements at the reconfigurable intelligent surface (RIS) are typically spaced at λ/2 spacing. Such spacing often results in spatial correlation, which limits the multiplexing gain and, consequently, the achievable spectral efficiency. This limitation becomes more pronounced in the terahertz (THz) band, envisioned for future wireless systems, due to its severe propagation losses. To address this, we propose the design of the optimal element spacings that improve the multiplexing gain and spectral efficiency in RIS-aided THz MIMO communications. Simulation results show that the proposed design achieves significant gains over the conventional λ/2 spacing, demonstrating its potential for next-generation wireless networks.
AB - In conventional multiple-input multiple-output (MIMO) systems, the antenna elements at the transmitter, receiver, and the reflecting elements at the reconfigurable intelligent surface (RIS) are typically spaced at λ/2 spacing. Such spacing often results in spatial correlation, which limits the multiplexing gain and, consequently, the achievable spectral efficiency. This limitation becomes more pronounced in the terahertz (THz) band, envisioned for future wireless systems, due to its severe propagation losses. To address this, we propose the design of the optimal element spacings that improve the multiplexing gain and spectral efficiency in RIS-aided THz MIMO communications. Simulation results show that the proposed design achieves significant gains over the conventional λ/2 spacing, demonstrating its potential for next-generation wireless networks.
KW - Multiple-input multiple-output (MIMO)
KW - multiplexing gain
KW - reconfigurable intelligent surface (RIS)
UR - https://www.scopus.com/pages/publications/105035071389
U2 - 10.1109/ICTC66702.2025.11388443
DO - 10.1109/ICTC66702.2025.11388443
M3 - Conference contribution
AN - SCOPUS:105035071389
T3 - International Conference on ICT Convergence
SP - 2140
EP - 2143
BT - 2025 16th International Conference on Information and Communication Technology Convergence, ICTC 2025
PB - IEEE Computer Society
T2 - 16th International Conference on Information and Communication Technology Convergence, ICTC 2025
Y2 - 14 October 2025 through 17 October 2025
ER -