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	—