Wireless Link Budget Estimation for Advanced Wireless Networks

Student name
Student registration number
Date of submission
1/28/2019

TASK I
Performing link budget estimation to find out the minimum transmission power required by the
transmission station for maximum transmission speed in the entire area.
Assumption:
No obstacle because the antenna is placed high enough and there is line of sight.
SN Rmaxspeed=20 dB
gaintx=2 dBi
STEP I
To fill up the table with the details as created in the plan,
1
Parameters Value
Distance between T & R 4km
Light-of-Sight Yes
Fresnel zone effect No
Frequency band 850Mhz
Transmitter Antenna Gain 2dBi
Receiver RSSI -45dB
Receiver Antenna Gain 2dbi
Required SNR 20db

To obtain the receiver RSSI- the linear measurement of how good the radio signal is between the
RC transmitter and receiver. It is the received signal strength indication- a safety feature critical
to a WWAN deployment in a new suburb.
EIGRP=PT −Lc+Ga
EIGRP=PT −0+2 dBi
To determine the Fresnel zone radius,
R ( mtrs )=17.31∗
√ D ( ¿ km )
4 f ( GHz )
¿ 17.31∗ √ 4
4∗0.85 =18.7753 m
R=18.7753 m
STEP II
The link budget estimation for the VU Collaborate for the required transmission power value,
maximum channel noise value, and link margin value,
Parameters Value
Required transmission power 50.0dBm
Maximum channel noise -10.0dB
Link margin 8.0dB
C
N =EIRP ( λ
4 πr )2
( Gr
lk T s B )
C
N 0
=EIRP ( λ
4 πr )2
( 1
lk
Gr
T s )
[ C
N0 ]dB
=EIRP−FSL−L+
[ Gr
T s ]dB
+228.6 [ dB−Hz ]
2