User's Manual

PN 8100-40 Help Hot Line (U.S. only): 1-800-530-9960 7-21
620004-0 Rev. B
Estimating RF Coverage
7.2.3 Coverage Distance
Equations (1) and (2), on pages 7-18 and 7-19, respectively, can be used to estimate
the distance from the antenna to where the RF signal decreases to the minimum
acceptable level at the wireless device.
Equation (2) can be simplified to:
PL = 20log(4πf/c) + PLSlogD (3)
where PLS is chosen to account for partition losses. Because different frequencies
penetrate partitions with different losses, the value of PLS will vary depending on the
frequency.
For simplicity, Equation (3) can be used to estimate the coverage distance of an
antenna that is connected to an RAU, for a given path loss, frequency, and type of
in-building environment.
Table 7-17 gives the value of the first term of Equation (3) (i.e., (20log(4πf/c)) for
various frequency bands.
Table 7-17 Frequency Bands and the Value of the first Term in Equation (3)
Band (MHz)
Mid-Band
Frequency
(MHz) 20log(4πf/c)Uplink Downlink
800 Cellular 824–849 869–894 859 31.1
800 iDEN 806–824 851–869 837.5 30.9
900 GSM 890–915 935–960 925 31.8
900 E-GSM 880–915 925–960 920 31.7
1800 DCS 1710–1785 1805–1880 1795 37.5
1800 CDMA (Korea) 1750–1780 1840–1870 1810 37.6
1900 PCS 1850–1910 1930–1990 1920 38.1