TY - JOUR
T1 - Blind Channel Estimation for RIS-Assisted Millimeter Wave Communication Systems
AU - Jia, Dianhao
AU - Shen, Wenqian
AU - An, Jianping
AU - Shim, Byonghyo
N1 - Publisher Copyright:
© 1967-2012 IEEE.
PY - 2026
Y1 - 2026
N2 - In the research of RIS-assisted communication systems, channel estimation is a problem of vital importance for further performance optimization. In order to reduce the pilot overhead to the greatest extent, blind channel estimation methods are required, which can estimate the channel and the transmit signals at the same time without transmitting pilot sequence. Different from existing researches in traditional MIMO systems, the RIS-assisted two-hop channel brings new challenges to the blind channel estimation design. Hence, a novel blind channel estimation method based on compressed sensing for RIS-assisted multiuser millimeter wave communication systems is proposed for the first time in this paper. Specifically, for accurately estimating the RIS-assisted two-hop channel without transmitting pilots, we propose a block-wise transmission scheme. Among different blocks of data transmission, RIS elements are reconfigured for better estimating the cascade channel. Inside each block, data for each user are mapped to a codeword for realizing the transmit signal recovery and equivalent channel estimation simultaneously. Simulation results demonstrate that our method can achieve a considerable accuracy of channel estimation and transmit signal recovery.
AB - In the research of RIS-assisted communication systems, channel estimation is a problem of vital importance for further performance optimization. In order to reduce the pilot overhead to the greatest extent, blind channel estimation methods are required, which can estimate the channel and the transmit signals at the same time without transmitting pilot sequence. Different from existing researches in traditional MIMO systems, the RIS-assisted two-hop channel brings new challenges to the blind channel estimation design. Hence, a novel blind channel estimation method based on compressed sensing for RIS-assisted multiuser millimeter wave communication systems is proposed for the first time in this paper. Specifically, for accurately estimating the RIS-assisted two-hop channel without transmitting pilots, we propose a block-wise transmission scheme. Among different blocks of data transmission, RIS elements are reconfigured for better estimating the cascade channel. Inside each block, data for each user are mapped to a codeword for realizing the transmit signal recovery and equivalent channel estimation simultaneously. Simulation results demonstrate that our method can achieve a considerable accuracy of channel estimation and transmit signal recovery.
KW - Reconfigurable intelligent surface
KW - blind channel estimation
KW - compressed sensing
UR - https://www.scopus.com/pages/publications/105014598969
U2 - 10.1109/TVT.2025.3603193
DO - 10.1109/TVT.2025.3603193
M3 - Article
AN - SCOPUS:105014598969
SN - 0018-9545
VL - 75
SP - 3497
EP - 3502
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 2
ER -