A Directivity-Dependent Rician K-Factor Model for Indoor Industrial Channels
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arXiv
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866909025123172352 |
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| author | Tzarouchis, Dimitrios C. |
| author_facet | Tzarouchis, Dimitrios C. |
| contents | We derive a physics-based, closed-form model linking antenna directivity to the root-mean-square (RMS) delay spread and mean excess delay in large reverberant indoor environments. Starting from the Rician K-factor-the ratio of line-of-sight (LOS) to scattered power we show that K scales with the total transmit-plus-receive (Tx+Rx) antenna gain through a single reverberance factor that quantifies scatter anisotropy. For an arbitrary scatter power delay profile (PDP), we derive a general identity connecting sigma, tau, and K; the exponential scatter model is the physically motivated special case. Ray-tracing simulations over 100 random link placements in a 57300 m3 industrial hall at 75 GHz validate the model. Compact design rules map target delay-spread values to the minimum required antenna gain, enabling wideband mmWave industrial links. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_03811 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Directivity-Dependent Rician K-Factor Model for Indoor Industrial Channels Tzarouchis, Dimitrios C. Systems and Control We derive a physics-based, closed-form model linking antenna directivity to the root-mean-square (RMS) delay spread and mean excess delay in large reverberant indoor environments. Starting from the Rician K-factor-the ratio of line-of-sight (LOS) to scattered power we show that K scales with the total transmit-plus-receive (Tx+Rx) antenna gain through a single reverberance factor that quantifies scatter anisotropy. For an arbitrary scatter power delay profile (PDP), we derive a general identity connecting sigma, tau, and K; the exponential scatter model is the physically motivated special case. Ray-tracing simulations over 100 random link placements in a 57300 m3 industrial hall at 75 GHz validate the model. Compact design rules map target delay-spread values to the minimum required antenna gain, enabling wideband mmWave industrial links. |
| title | A Directivity-Dependent Rician K-Factor Model for Indoor Industrial Channels |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2605.03811 |