Research Article
Measurement of Coherence Bandwidth in UHF Radio Channels for Narrowband Networks
Table 3
Measured values of coherence bandwidth for UHF narrowband channels.
| Parameter | City | Hilly terrain | Flat terrain |
| Number of PDP measurements | 64365 | 59918 | 169945 | Minimal distance to BS [km] | 0.46 | 0.7 | 12.4 | Maximal distance to BS [km] | 63.8 | 81.2 | 62.7 |
| Coherence bandwidth calculated from rms delay spread for correlation 0.5 |
| mean value [kHz] | 315.4 | 390.6 | 479.7 | exceeded in 50% of cases [kHz] | 318.6 | 437.3 | 497.3 | exceeded in 90% of cases [kHz] | 122.6 | 173.6 | 409.8 | exceeded in 99% of cases [kHz] | 49.1 | 64.8 | 248.8 | minimal value [kHz] | 18 | 23.4 | 32.3 | below 25 kHz [% of time] | 0.1 | 0.003 | — |
| Coherence bandwidth calculated from PDP Fourier transform for correlation 0.5 |
|
mean value [kHz] | 392.5 | 455.4 | 522.6 | exceeded in 50% of cases [kHz] | 427.4 | 504.7 | 534.2 | exceeded in 90% of cases [kHz] | 188.1 | 272.5 | 482.3 | exceeded in 99% of cases [kHz] | 75.2 | 95 | 356.6 | minimal value [kHz] | 32.4 | 43.6 | 48.7 | below 25 kHz [% of time] | — | — | — |
| Coherence bandwidth calculated from PDP Fourier transform for correlation 0.9 |
| mean value [kHz] | 140.6 | 167.7 | 198.6 | exceeded in 50% of cases [kHz] | 145.3 | 185.9 | 204.3 | exceeded in 90% of cases [kHz] | 66.8 | 89.7 | 176 | exceeded in 99% of cases [kHz] | 36.9 | 42.8 | 121.9 | minimal value [kHz] | 21.8 | 23.5 | 26.8 | below 25 kHz [% of time] | 0.13 | 0.013 | — |
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