Simulation of using QAM Modulation at Broadband Wireless

Access 3,3 GHz with SUI Channel Model

Aulia Fil Ardhyana7209030053

BackgroundBWA 3,3 GHz

Data Rate

Using of QAM

ModulationSNR based

on the value Pathlo

sss

Probabilitas bit Error

PURPOSE

Using of QAM Modulation

Data Rate transmission at bwa 3,3 GHz with QAM Modulation

BTS to ss

METHODOLOGYDemografi URBAN

Calculate pathloss(dB)

Calculate RSSI

Calculat SNR

Perhitungan nilai Probabilitas Error

Perhitungan nilai Data Rate

PATHLOSSPathloss is the difference in power between the

power transmitted to the power of the received.

shows that the signal level heve attenuation.

pathloss in here using SUI channel modeling.

Graph of pathloss

0 1 2 3 4 5 6 7 850

60

70

80

90

100

110

120

130

140

150

Distance between Tx and Rx (km)

Pat

h lo

ss (

dB)

10 m receiver antenna height in urban, sub urban, and rural environment

urban

sub-urban

Rural

RSSIThe RSSI is specified in the fixed wimax when

analyzing signal strength it is useful to relate the RSSI to the distance between the BS and SS.

The system has receive signal strength indicator (RSSI) which reports a value in dB.

Graph of RSSI

0 1 2 3 4 5 6 7 8-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

Distance between Tx and Rx 8(km)

nila

i RS

SI

(dB

)Nilai RSSI dengan jarak transmit dan receive 8 Km tinggi SS = 10 m

urban

sub-urban

Rural

SNRSNR is a better measure for the actual operating

conditions of the receiver than the RSSI value, since the SNR value takes into account interference and noise condition to signal strength.

GRAPH OF SNR

-90 -80 -70 -60 -50 -40 -30 -20 -10 0 1018

20

22

24

26

28

30

32

34

Nilai RSSI

nila

i SN

R (

dB)

Nilai SNR berdasarkan perubahan jarak, SS = 10 m

urban

sub-urban

Rural

-90 -80 -70 -60 -50 -40 -30 -20 -10 0 1018

20

22

24

26

28

30

32

34

Nilai RSSI

nila

i SN

R (

dB)

Nilai SNR berdasarkan perubahan jarak, SS = 3 m

urban

-80 -70 -60 -50 -40 -30 -20 -10 0 1028

29

30

31

32

33

34

Nilai RSSI

nila

i SN

R (

dB)

Nilai SNR berdasarkan perubahan jarak, SS = 3 m

sub-urban

-70 -60 -50 -40 -30 -20 -10 0 1032

32.2

32.4

32.6

32.8

33

33.2

33.4

33.6

33.8

34

Nilai RSSI

nila

i SN

R (

dB)

Nilai SNR berdasarkan perubahan jarak, SS = 3 m

Rural

Probability of Bit ErrorBER is the performance to support the M-

QAM modulation. At any rate modulation usedto know the value of error probability (Pb)

so any modulation rate can be determined andthe performance quality in signal transmission.

Graph of Probability

0 5 10 15 20 25 30 3510

-7

10-6

10-5

10-4

10-3

10-2

10-1

100

Nilai SNR

nila

i pro

babi

litas

err

or (

dB)

Probabilitas Error berdasarkan nilai SNR

64 qam

16 qam

Data Ratedata rate is the speed of the data

transmitted from the BTS to the SS. This data rate depends on the

modulation used and according to the state of the environment

The expected results

All of parameters as  : pathlloss, RSSI, snr, the probability of bit error rateaims to determine the data in a transmission with QAM modulation

THANK YOU…