Flexible Precoding for Multi-User Movable Antenna Communications
Fuente:
arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | |
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| _version_ | 1866916159448678400 |
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| author | Yang, Songjie Lyu, Wanting Ning, Boyu Zhang, Zhongpei Yuen, Chau |
| author_facet | Yang, Songjie Lyu, Wanting Ning, Boyu Zhang, Zhongpei Yuen, Chau |
| contents | This letter rethinks traditional precoding in multi-user wireless communications with movable antennas (MAs). Utilizing MAs for optimal antenna positioning, we introduce a sparse optimization (SO)-based approach focusing on regularized zero-forcing (RZF). This framework targets the optimization of antenna positions and the precoding matrix to minimize inter-user interference and transmit power. We propose an off-grid regularized least squares-based orthogonal matching pursuit (RLS-OMP) method for this purpose. Moreover, we provide deeper insights into antenna position optimization using RLS-OMP, viewed from a subspace projection angle. Overall, our proposed flexible precoding scheme demonstrates a sum rate that exceeds more than twice that of fixed antenna positions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_18847 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flexible Precoding for Multi-User Movable Antenna Communications Yang, Songjie Lyu, Wanting Ning, Boyu Zhang, Zhongpei Yuen, Chau Information Theory Signal Processing This letter rethinks traditional precoding in multi-user wireless communications with movable antennas (MAs). Utilizing MAs for optimal antenna positioning, we introduce a sparse optimization (SO)-based approach focusing on regularized zero-forcing (RZF). This framework targets the optimization of antenna positions and the precoding matrix to minimize inter-user interference and transmit power. We propose an off-grid regularized least squares-based orthogonal matching pursuit (RLS-OMP) method for this purpose. Moreover, we provide deeper insights into antenna position optimization using RLS-OMP, viewed from a subspace projection angle. Overall, our proposed flexible precoding scheme demonstrates a sum rate that exceeds more than twice that of fixed antenna positions. |
| title | Flexible Precoding for Multi-User Movable Antenna Communications |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2402.18847 |