Design of hybrid field beamforming scheme for STAR-RIS-aided communication systems
A beamforming design scheme was proposed based on simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) communication systems. To address the hybrid near-far field challenges induced by extremely large-scale antenna arrays (ELAA), a hybrid channel model based on ar...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2025-07-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2025099/ |
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| Summary: | A beamforming design scheme was proposed based on simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) communication systems. To address the hybrid near-far field challenges induced by extremely large-scale antenna arrays (ELAA), a hybrid channel model based on array steering vectors was established first. Subsequently, a hybrid clustering strategy for far-near field users based on hybrid non-orthogonal multiple access (H-NOMA) and a serial interference cancellation (SIC) scheme at the receiving end were proposed to match far-near field users according to the channel strength from STAR-RIS to users. Through joint optimization of beamforming vectors and STAR-RIS phase shift matrices, a suboptimal solution was derived for the max-min total rate optimization problem. Simulation results demonstrate the superior performance of the proposed scheme in hybrid scenarios, where STAR-RIS and H-NOMA effectively enhance system performance. Compared with conventional passive RIS, orthogonal multiple access (OMA), and far-field channel modeling approaches, the proposed scheme achieves 220.9%, 71.2%, and 23.4% improvements in max-min total rate, respectively. |
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| ISSN: | 1000-436X |