Optimal Design of Multiuser mmWave LOS MIMO Systems Using Hybrid Arrays of Subarrays

In this paper, we investigate optimal design of millimeter-wave (mmWave) multiuser line-of-sight multiple-input-multiple-output (LOS MIMO) systems using hybrid arrays of subarrays based on hybrid block diagonalization (BD) precoding and combining scheme. By introducing a general 3D geometric channel...

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Bibliographic Details
Published in:IEICE Transactions on Communications 2024/01/01, Vol.E107.B(1), pp.262-271
Main Authors: PAN, Zhaohu, LI, Hang, HUANG, Xiaojing
Format: Article
Language:English
Subjects:
and subarray deployment
Arrays
Design parameters
Eigenvalues
hybrid arrays
Hybrid systems
Line of sight
massive MIMO
Millimeter waves
MIMO communication
multiuser
Optimization
Parameter sensitivity
Three dimensional models
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Summary:In this paper, we investigate optimal design of millimeter-wave (mmWave) multiuser line-of-sight multiple-input-multiple-output (LOS MIMO) systems using hybrid arrays of subarrays based on hybrid block diagonalization (BD) precoding and combining scheme. By introducing a general 3D geometric channel model, the optimal subarray separation products of the transmitter and receiver for maximizing sum-rate is designed in terms of two regular configurations of adjacent subarrays and interleaved subarrays for different users, respectively. We analyze the sensitivity of the optimal design parameters on performance in terms of a deviation factor, and derive expressions for the eigenvalues of the multiuser equivalent LOS MIMO channel matrix, which are also valid for non-optimal design. Simulation results show that the interleaved subarrays can support longer distance communication than the adjacent subarrays given the appropriate fixed subarray deployment.
ISSN:0916-8516
1745-1345
DOI:10.1587/transcom.2023EBP3091