Channel Estimation for FAS-Assisted Multiuser mmWave Systems

Xu H, Zhou G, Wong KK, New WK, Wang C, Chae CB, Murch R, Jin S, Zhang Y (2024)

Publication Type: Journal article

Publication year: 2024


Book Volume: 28

Pages Range: 632-636

Journal Issue: 3

DOI: 10.1109/LCOMM.2023.3347951


This letter investigates the challenge of channel estimation in a multiuser millimeter-wave (mmWave) time-division duplexing (TDD) system. In this system, the base station (BS) uses a multi-antenna uniform linear array (ULA), while each mobile user has a fluid antenna system (FAS). Accurate channel state information (CSI) plays a crucial role in the precise placement of antennas in FAS. To tackle this issue, we propose a low-sample-size sparse channel reconstruction (L3SCR) method, capitalizing on the sparse propagation paths of mmWave channels. Simulation results show that our method obtains precise CSI with minimal hardware switching and pilot overhead. As a result, the system sum-rate approaches the upper bound with perfect CSI.

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Xu, H., Zhou, G., Wong, K.K., New, W.K., Wang, C., Chae, C.B.,... Zhang, Y. (2024). Channel Estimation for FAS-Assisted Multiuser mmWave Systems. IEEE Communications Letters, 28(3), 632-636.


Xu, Hao, et al. "Channel Estimation for FAS-Assisted Multiuser mmWave Systems." IEEE Communications Letters 28.3 (2024): 632-636.

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