Research Article
Channel Measurement for Multiple Frequency Bands in Subway Tunnel Scenario
| Parameters | Narrowband measurement | Broadband measurement |
| Frequency | 2.6 GHz/3.5 GHz/5.6 GHz/10 GHz/28 GHz | 3.5 GHz/5.6 GHz | Probe signal | Sine wave | PN sequence | Bandwidth | 0 | 160 MHz | Antenna structure | Omnidirectional antenna (Tx) | Omnidirectional antenna (Rx) | Uniform rectangular array (Tx) | Uniform cylindrical array (Rx) | Polarization of Tx/Rx antenna | Vertical/vertical | Dual polarization: 3.5 GHz: ±45° 5.6 GHz: vertical and horizontal | Height of Tx/Rx antenna | 1.8 m/2.7 m | 1.8 m/2.7 m | Farthest measurement distance | 800 m | 500 m | Number of sampling points | 85 | 3.5 GHz: 91 5.6 GHz: 43 |
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