User's Manual

PN 8100-40 Help Hot Line (U.S. only): 1-800-530-9960 7-39
620004-0 Rev. B
Link Budget Analysis
7.4.4 Spread Spectrum Link Budget Analysis for a Microcell
Application
Spread Spectrum Link Budget Analysis: Downlink
Line Downlink
Transmitter
a. BTS transmit power per carrier (dBm) 30.0
b. Voice activity factor 50%
c. Maximum composite power (dBm) 40.0
d. Attenuation between BTS and LGCell (dB) –30
e. Power per carrier into LGCell (dBm) 3.0
f. Composite power into LGCell (dBm) 10.0
g. LGCell gain (dB) 0.0
h. Antenna gain (dBi) 3.0
i. Radiated power per carrier (dBm) 3.0
j. Total radiated power (dBm) 13.0
Airlink
k. Handoff gain (dB) 7.0
l. Multipath fade margin (dB) 6.0
m. Log-normal fade margin with 8 dB std. deviation, edge reliability
90% (dB)
10.0
n. Additional loss (dB) 0.0
o. Body loss (dB) 3.0
p. Airlink losses (not including facility path loss) 19.0
Receiver
q. Mobile noise figure (dB) 7.0
r. Thermal noise (dBm/Hz) –174.0
s. Receiver interference density (dBm/Hz) –167.0
t. Information ratio (dB/Hz) 41.6
u. Required Eb/(No+lo) 7.0
v. Receive Sensitivity (dBm) –118.4
w. Minimum received signal (dBm) –99.4
x. Maximum path loss (dB) 102.4
y. Difference between open- and closed-loop transmitter power (dB) –2.0