User's Manual Part 1

Designing an LGCell Solution

7-18 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40

620004-0 Rev. E

7.2.3 Coverage Distance

Equations (1) and (2), on pages 7-15 and 7-16, 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 7-14 gives the value of the first term of Equation (3) (i.e., (20log(4πf/c)) for

various frequency bands.

Table 7-14 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

a. The 800 MHz CDMA/900 MHz GSM dual-band LGCell supports the following bands:

800 MHz CDMA

Downlink: 870 to 880 MHz

Uplink: 825 to 835 MHz

Bandwidth: 10 MHz

900 MHz GSM:

Downlink: 954 to 960 MHz

Uplink: 909 to 915 MHz

Bandwidth: 6 MHz

These bands are narrower than those for the 800 MHz Cellular and 900 MHz GSM single-band

LGCells. However, because the mid-band frequencies of the 800/900 dual-band LGCell bands are

almost identical to those for the single-band LGCells, the 20log(4

πf/c) terms also are almost identical.

To simplify this table and those that follow, it is assumed that the first term in the equation (3) is the

same for the 800 MHz Cellular and the 800 MHz CDMA systems; likewise for the 900 MHz GSM sys-

tems.

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