User's Manual

PN 9000-10 Help Hot Line (U.S. only): 1-800-530-9960 5-37
620021-0 Rev. A
5.4.4 Spread Spectrum Link Budget Analysis for a Microcell
Application
Spread Spectrum Link Budget Analysis: Downlink
Line Downlink
Transmitter
a. BTS transmit power per traffic channel (dBm) 30.0
b. Voice activity factor 50%
c. Composite power (dBm) 40.0
d. Attenuation between BTS and Unison (dB) –24
e. Power per channel into Unison (dBm) 9.0
f. Composite power into Unison (dBm) 16.0
g. Unison gain (dB) 0.0
h. Antenna gain (dBi) 3.0
i. Radiated power per channel (dBm) 12.0
j. Composite radiated power (dBm) 19.0
Airlink
k. Handoff gain (dB) 0.0
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/(N
o
+l
o
)7.0
v. Receive Sensitivity (dBm) –118.4
w. Minimum received signal (dBm) –99.4
x. Maximum path loss (dB) –99.4