The Tri-Hybrid MIMO Architecture
Fuente:
arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908382658560000 |
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| author | Heath, Jr., Robert W. Carlson, Joseph Deshpande, Nitish Vikas Castellanos, Miguel Rodrigo Akrout, Mohamed Chae, Chan-Byoung |
| author_facet | Heath, Jr., Robert W. Carlson, Joseph Deshpande, Nitish Vikas Castellanos, Miguel Rodrigo Akrout, Mohamed Chae, Chan-Byoung |
| contents | We present an evolution of multiple-input multiple-output (MIMO) wireless communications known as the tri-hybrid MIMO architecture. In this framework, the traditional operations of linear precoding at the transmitter are distributed across digital beamforming, analog beamforming, and reconfigurable antennas. Compared with the hybrid MIMO architecture, which combines digital and analog beamforming, the tri-hybrid approach introduces a third layer of electromagnetic beamforming through antenna reconfigurability. This added layer offers a pathway to scale MIMO spatial dimensions, important for 6G systems operating in centimeter-wave bands, where the tension between larger bandwidths and infrastructure reuse necessitates ultra-large antenna arrays. We introduce the key features of the tri-hybrid architecture by (i)~reviewing the benefits and challenges of communicating with reconfigurable antennas, (ii)~examining tradeoffs between spectral and energy efficiency enabled by reconfigurability, and (iii)~exploring configuration challenges across the three layers. Overall, the tri-hybrid MIMO architecture offers a new approach for integrating emerging antenna technologies in the MIMO precoding framework. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_21971 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Tri-Hybrid MIMO Architecture Heath, Jr., Robert W. Carlson, Joseph Deshpande, Nitish Vikas Castellanos, Miguel Rodrigo Akrout, Mohamed Chae, Chan-Byoung Information Theory Networking and Internet Architecture We present an evolution of multiple-input multiple-output (MIMO) wireless communications known as the tri-hybrid MIMO architecture. In this framework, the traditional operations of linear precoding at the transmitter are distributed across digital beamforming, analog beamforming, and reconfigurable antennas. Compared with the hybrid MIMO architecture, which combines digital and analog beamforming, the tri-hybrid approach introduces a third layer of electromagnetic beamforming through antenna reconfigurability. This added layer offers a pathway to scale MIMO spatial dimensions, important for 6G systems operating in centimeter-wave bands, where the tension between larger bandwidths and infrastructure reuse necessitates ultra-large antenna arrays. We introduce the key features of the tri-hybrid architecture by (i)~reviewing the benefits and challenges of communicating with reconfigurable antennas, (ii)~examining tradeoffs between spectral and energy efficiency enabled by reconfigurability, and (iii)~exploring configuration challenges across the three layers. Overall, the tri-hybrid MIMO architecture offers a new approach for integrating emerging antenna technologies in the MIMO precoding framework. |
| title | The Tri-Hybrid MIMO Architecture |
| topic | Information Theory Networking and Internet Architecture |
| url | https://arxiv.org/abs/2505.21971 |