Site-Specific and Frequency-Dependent Channel Characterization and MIMO Performance in FR3
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917186805694464 |
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| author | Cui, Zhuangzhuang Chattopadhyay, Rudranil Vanspranghels, Emiel Pollin, Sofie |
| author_facet | Cui, Zhuangzhuang Chattopadhyay, Rudranil Vanspranghels, Emiel Pollin, Sofie |
| contents | Next-generation wireless systems aim to enable on-demand connectivity through dynamic spectrum utilization. Motivated by this vision, this paper investigates the propagation characteristics and MIMO performance of the upper mid-band, spanning approximately 7-24 GHz and unofficially referred to as FR3. Using site-specific ray-tracing (RT) simulations based on the Sionna framework, we analyze indoor and outdoor environments at representative frequencies across FR1, FR3, and FR2, including 3.5, 7, 10, 14, 20, 24, and 28 GHz, under both single-antenna and multi-antenna configurations. The results show that FR3 exhibits intermediate propagation behavior between sub-6 GHz and millimeter-wave bands while sustaining effective spatial multiplexing and favorable spectral efficiency. Furthermore, large-array analysis indicates that performance gains in FR3 are closely tied to antenna scaling, highlighting the importance of large-size or large-aperture MIMO architectures for practical deployments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_02903 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Site-Specific and Frequency-Dependent Channel Characterization and MIMO Performance in FR3 Cui, Zhuangzhuang Chattopadhyay, Rudranil Vanspranghels, Emiel Pollin, Sofie Systems and Control Next-generation wireless systems aim to enable on-demand connectivity through dynamic spectrum utilization. Motivated by this vision, this paper investigates the propagation characteristics and MIMO performance of the upper mid-band, spanning approximately 7-24 GHz and unofficially referred to as FR3. Using site-specific ray-tracing (RT) simulations based on the Sionna framework, we analyze indoor and outdoor environments at representative frequencies across FR1, FR3, and FR2, including 3.5, 7, 10, 14, 20, 24, and 28 GHz, under both single-antenna and multi-antenna configurations. The results show that FR3 exhibits intermediate propagation behavior between sub-6 GHz and millimeter-wave bands while sustaining effective spatial multiplexing and favorable spectral efficiency. Furthermore, large-array analysis indicates that performance gains in FR3 are closely tied to antenna scaling, highlighting the importance of large-size or large-aperture MIMO architectures for practical deployments. |
| title | Site-Specific and Frequency-Dependent Channel Characterization and MIMO Performance in FR3 |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2601.02903 |