IRS多分区辅助太赫兹多子阵列波束成形设计

doi:10.11959/j.issn.1000-436x.2023158

Abstract

Abstract:

In the IRS-aided THz communication system, in order to break the channel sparsity limitation on the system spatial multiplexing gain, a hybrid beam forming architecture with wide-spaced multi-subarrays at the transceiver/transmitter side was proposed and the transmission scheme of IRS multi-partition-aided THz multi-subarrays was designed.Firstly, a non-convex objective function with multivariate coupling and non-convex constraints was constructed based on the principle of maximizing spectrum efficiency.Then, the optimization problem was decoupled into two easy-to-solve sub-problems, namely, the reflection coefficient matrix design of IRS and the hybrid beamforming matrix design at the transceiver/receiver.Finally, the Riemannian manifold optimization algorithm was used to calculate the reflection coefficient matrix of IRS, and the closed solution of the hybrid beamforming matrix design at the transceiver/receiver was obtained through mathematical derivation.Simulation results show that compared with the baseline scheme, the proposed scheme can achieve better spectrum efficiency.

Key words: intelligent reflecting surface, two-level spatial multiplexing, hybrid beamforming, Riemannian manifold optimization

CLC Number:

TN92

Zufan ZHANG, Rui TANG. Design of beamforming for IRS multi-partition-aided THz multi-subarray[J]. Journal on Communications, 2023, 44(8): 78-88.

Figures/Tables 5

References 25

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