Tracker and Jammer

8/7/2019 Tracker and Jammer

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In GSM tracker system ,the cell informationprovided by each cell of the GSM network istaken from the mobile device and converted

into the form of an SMS which is sent back tothe master system. The master systemidentifies the cell and locates the vehicle.

JAMMING is the act of intentionally directingelectromagnetic energy at a communicationsystem to disrupt or prevent signaltransmission.


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GPS Global Positioning System Allow GPS receiver to determine its exact POSITION in

longitude and latitude, velocity, direction etc.

GSM Global System of Mobile Allow this POSITION information to be sent to central

control room as SMS or GSM data call

GPRS General Packet Radio Service Allow transfer of multimedia content like photograph

to central control room or other mobile unit


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GSM is required in Vehicle tracking systems because GPS

system can normally only receive location information

from satellites but cannot communicate back with them.Hence we need some other communication system like

GSM to send this location information to central control

room.

Other technologies can also be used but they are more

costly


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Tracker

LBS (Location based services)

Push Based

Pull BasedApplication


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Communicating With GSM Modem

Using Software (NetMonHR)


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Getting data from Microcontroller

Separating Cell ID and LAC

Finding out methods to map on

google map

Navigation


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1. TRANSMITTER:

Interconnect

network 89V51

MAX-232

LCD

Display


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2. RECEIVER:

Interconnect

network89V51

PC

Interface

IC 4050


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The frequency of the transmitted signal of thejammer must cover the GSM frequency range

As the power received from the GSM Base Station isusually low, It is easier to jamm the downlink (i.e.Jamming the mobile station 'handset' receiver) thanuplink, hence the jammer output frequency shouldcover the downlink frequency.

UPLINK DOWNLINK

GSM 900 890 915 MHz 935 960 MHz


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PowerSupply

3.5,5,

12,-

12V

IFSection

RFSection


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RF section is the most important part ofthe jammer.

It consists of VCO,RF power amplifier andantenna.

These components were selectedaccording to the specification of the

jammer such as frequency range andcoverage.


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The function of the IF-section of the Mobile jammer is

to generate the tuning signal required by the VCO in

the RF-Section.

The main parts of the IF-Section are:

Triangular Wave Generator

Noise Generator

Signal Mixer and DC offset


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The Jammer designed to take its power

from the regular 220V AC wall outlets.

The IF & RF sections of the jammerrequire +3.5, 5, +12, and -12 DC Voltages.

Transformer Rectifier Filter

+ Regulator

+12V

+ Regulator

+5V

- Regulator

- 12V


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Jammer can be use in the followingplaces:

Conference room

Temples and Mosques

Government offices

Libraries

Tracker and Jammer

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