GSM 900 Moblie Jammer Jisrawi

7/24/2019 GSM 900 Moblie Jammer Jisrawi

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GSM-900 Mobile JAMMER

EE592:Graduation Project

Ahmad Jisrawi


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INTRODUCTION

JAMMING is the act of intentionally directing

electromagnetic energy at a communication

system to disrut or re!ent signal transmission"

#he G$M Jammer is a de!ice that transmit

signal on the same fre%uency at &itch the G$M

system oerates' the jamming success &hen themo(ile hones in the area &here the jammer is

located could)nt ma*e or reciece call hones "


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JAMMING Techniques 1

#ye +A,: JAMME-$

#ye ,.,: Intelligent /ellular 0isa(lers #ye +/,: Intelligent .eacon 0isa(lers

#ye ,0,: $mart JAMME-$

#ye ,E,: 1araday /age EMI $uression#echni%ues3


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GSM JAMMING Requireen! 1

Jamming is successful &hen the jamming signal denies theusa(ility of the communications transmission" In digital

communications' the usa(ility is denied &hen the error rate of

the transmission cannot (e comensated (y error correction"

4sually a successful jamming attac* re%uires that the jammer

o&er is roughly e%ual to signal o&er at the recei!er"

#he effects of jamming deend on the jammingtosignal ratio

J6$3' and the modulation scheme"


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GSM JAMMING Requireen! "Jammingto$ignal ratio is gi!en (y:

7here:

Pj 8 jammer o&erPt 8 transmitter o&er

Gjr 8 antenna gain jammer to recei!er3

Grj 8 antenna gain recei!er to Jammer3

Gtr 8 antenna gain transmitter to recei!er3

Grt 8 antenna gain recei!er to transmitter3

.r 8 communications recei!er (and&idth

.j 8 jamming transmitter (and&idth

-tr 8 range (et&een communications transmitter and recei!er

-jt 8 range (et&een jammer and communications recei!er

j 8 jammer signal loss including olariation mismatch3

r 8 communication signal loss

BLRGGP

BLRGGP

S

J

jjjrrttrt

rrtrrjjrj

2

2

=


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GSM JAMMING Requireen! #

#he fre%uency of the transmitted signal of the jammer

must co!er the G$M fre%uency range

As the o&er recei!ed from the G$M .ase $tation is

usually lo&' It is easier to jamm the do&nlin* i"e"

Jamming the mo(ile station ;handset; recei!er3 than

ulin*' hence the jammer outut fre%uency should

co!er the do&nlin* fre%uency"

Uplink Downlink

GSM 900 890-915 MHz 935-960 MHz


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Desi$n %n& I'leen!%!ion

GSM Mobile JAMMER

Power

Supply

5, 9,-9 V

!

Se"#ion

$!

Se"#ion

.loc* diagram of the mo(ile Jammer


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GSM-900 Mobile J%er

R(-Sec!ion 1

#he -1section is resonsi(le for generating andtransmitting the -1Jamming signal" #he mainarts are:


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GSM-900 Mobile J%er

R(-Sec!ion "

#he outut o&er of the jammer &as designed so that it has a

range of 2>m' and &as calculated as follo&: Jr jammer o&er at mo(ile recei!er3 ? $ma@ $N-min

$N-min 8 9 d. for mo(ile recei!er and$ma@ 8 B5d.m Mo(ile station signal o&er at mo(ile

recei!er3

Jr ? 2C d.m

#he jammer outut o&er 8 Jr D 1free sace ath loss e%uation:

1 8 2"C5 D 2> log f F03' f in MH and 0 in m

=utut o&er 8 5 2C 8 C d.m


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GSM-900 Mobile J%er

R(-Sec!ion #

The )CO 1

#he MAK2L2 >> M for a tune !oltage from >"C 2"L


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GSM-900 Mobile J%er

R(-Sec!ion *

The )CO "

#he MAK2L2


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GSM-900 Mobile J%er

R(-Sec!ion +

The )CO #

#he outut of #he M


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GSM-900 Mobile J%er

R(-Sec!ion ,

R( o.er A'li/iers 1

#&o -1 o&er amlifiers &ere used to achie!e

the re%uired outut o&er i"e" Cd.m3"

#he first stage o&er amlifier &as the MA-

C$M from Mini/ircuits it has a gain of d. for

fre%uency range from 0/ to B>>> M

so the outut of this stage should (e 5d.m

for the d.m outut of the


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GSM-900 Mobile J%er

R(-Sec!ion

R( o.er A'li/iers "

Inut and outut are matched to 5>hom load

#he MA-C$M is current (iased o&er amlifier

#yical (iasing /onfiguration for the MA-C$M


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GSM-900 Mobile J%er

R(-Sec!ion

R( o.er A'li/iers #

#he second stage o&er amlifier is the itachi

P1>B>( dual o&er amlifier &ith efficiency at C"

It can oerate either on G$M9>> or 0/$B>>' so

e@ternal circuitry &as designed to configure it to oeratein G$M mode

#he outut of the o&er amlifier is 5d.m

for Bd.m inut


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GSM-900 Mobile J%er

R(-Sec!ion 9

R( o.er A'li/iers *

$ymmetric #Net&or* &ith Cd. attenuation &as used #o

o(tain Bd.m at the inut of the second o&er amlifier from

the 5d.m outut of the first o&er amlifier"

1or Cd. attenuation' and matched to 5>ohm transmission

line' "LB 8 K 6 K D -B33F5> 6 5> D -B3

5> 8 -2 D 5>3 66 -3 D -B

&here K 8 -2 D 5>366-"


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GSM-900 Mobile J%er

R(-Sec!ion 10

The An!enn%

B6C &a!e monoole

antenna' &ith center

fre%uency at 9BLMh and

(and&idth of B5> M" 5> ohm imedance


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GSM-900 Mobile J%er

R(-Sec!ion 11


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GSM-900 Mobile J%er

R(-Sec!ion 1"


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#he function of the I1section of the Mo(ilejammer is to generate the tuning signal re%uired

(y the


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GSM-900 Mobile J%er

I(-Sec!ion "

Tri%n$ul%r 2%3e Gener%!or

#he circuit used to generate

the triangular &a!e is the 555

#imer as A$#A.E

M4#I

( )CRRf

extr

21

%%&1

+

=


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GSM-900 Mobile J%er

I(-Sec!ion #

Noise Gener%!or 1

Noise &ill hel in mas*ing the jamming transmission'ma*ing it loo* li*e random noise to an outsideo(ser!er"

#he noise generator used is (ased on the a!alanche

noise generated (y a Hener (rea*do&n henomenon" #he noise generator circuit consists of:

A standard L" !olt Hener diode &ith a small re!ersecurrent

#ransistor (uffer National ML audio amlifier function as:

$mall signal amlifier .and ass filter


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GSM-900 Mobile J%er

I(-Sec!ion *

Noise Gener%!or "

Noise generator outut sectrum


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GSM-900 Mobile J%er

I(-Sec!ion +

Si$n%l Mi4er %n& DC-O//se! Circui!s

#he triangle &a!e andnoise signals are mi@ed

using =Am configured

as summer"

A 0/ !oltage is added tothe resulted signal to o(tain

the re%uired tuning !oltage

using 0iode/lamer circuit"

GSM 900 M bil J


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GSM-900 Mobile J%er

I(-Sec!ion ,

Sche%!ics


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GSM-900 Mobile J%er

I(-Sec!ion

C5


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GSM-900 Mobile J%er

o.er Su''l6 1

#he Jammer designed to ta*e it)s o&er from the regular

22>< A/ &all outlets"

#he I1 Q -1 sections of the jammer re%uire D5' D9' and

9 0/


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GSM-900 Mobile J%er

o.er Su''l6 "

Circui! Sche%!ic


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GSM-900 Mobile J%er

o.er Su''l6 #

C5


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Conclusions

In this roject a G$M9>> Mo(ile Jammer&as designed and (uilt"

#he roject &as tested against the t&o G$M

9>> Net&or*s in Jordan i"e" 1astlin* andMo(ilecom3 and has ro!en success"

#he effecti!e jamming range &as not ase@ected' due to the shortage in the currentsulied to the o&er amlifier also a moresta(le o&er suly needed for a ro(ustoeration"


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RuestionsS

GSM 900 Moblie Jammer Jisrawi

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