Research Article

Channel Measurement for Multiple Frequency Bands in Subway Tunnel Scenario

Table 1

Measurement parameters.

ParametersNarrowband measurementBroadband measurement

Frequency2.6 GHz/3.5 GHz/5.6 GHz/10 GHz/28 GHz3.5 GHz/5.6 GHz
Probe signalSine wavePN sequence
Bandwidth0160 MHz
Antenna structureOmnidirectional antenna (Tx)Omnidirectional antenna (Rx)Uniform rectangular array (Tx)Uniform cylindrical array (Rx)
Polarization of Tx/Rx antennaVertical/verticalDual polarization: 3.5 GHz: ±45° 5.6 GHz: vertical and horizontal
Height of Tx/Rx antenna1.8 m/2.7 m1.8 m/2.7 m
Farthest measurement distance800 m500 m
Number of sampling points853.5 GHz: 91 5.6 GHz: 43