Mobile phone jammer is an instrument used to prevent cellular phones from receiving signals from base stations. When used, the jammer effectively disables cellular phones. These devices can be used in practically any location, but are found primarily in places where a phone call would be particularly disruptive because silence is expected.
Jamming is usually distinguished from interference that can occur due to device malfunctions or other accidental circumstances. Devices that simply cause interference are regulated under different regulations. Unintentional 'jamming' occurs when an operator transmits on a busy frequency without first checking whether it is in use, or without being able to hear stations using the frequency. Another form of unintentional jamming occurs when equipment accidentally radiates a signal, such as a cable television plant that accidentally emits on an aircraft emergency frequency.
TABLE OF CONTENTS
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRCT
TABLE OF CONTENT
CHAPTER ONE
- INTRODUCTION
- AIM/OBJECTIVE OF THE PROJECT
- PROJECT BACKGROUND
- STATEMENT OF PROBLEM
- SCOPE OF PROJECT /LIMITATION
- APPLICATION OF THE PROJECT
- PURPOSE OF THE PROJECT
- PROJECT ORGANISATION
CHAPTER TWO
LITERATURE REVIEW
2.0 LITERATURE REVIEW
2.2 PREVIOUS WORK
2.3 PRESENT WORK
2.4 HOW A GSM JAMMER WORKS
2.5 HOW GSM JAMMERS ARE MADE
2.6 GSM JAMMER RANGE
2.7 RADIO FREQUENCY JAMMER USES
2.8 RADIO FREQUENCY JAMMER EVOLUTION
CHAPTER THREE
3.0 CONSTRUCTION METHODOLOGY
3.1 DISTINCTION BETWEEN "JAMMING" AND "INTERFERENCE"3.2 APPLICATION OF GSM JAMMER IN LECTURE AUDITORIUM
3.3 IMPACT OF GSM JAMMER ON SERVICE DELIVERY
CHAPTER FOUR
4.0 TECHNICAL ASPECTS OF THE PRIVACY OF MOBILE PHONE USERS
4.1 HOW MOBILE PHONE NETWORKS WORK
4.2 SECURITY MEASURES IN DIFFERENT MOBILE PHONE SYSTEMS
4.3 PRIVACY THREATS FROM TECHNICAL PERSPECTIVES
CHAPTER FIVE
5.0 CONCLUSIONS, RECOMMENDATIONS AND FUTURE WORK
- CONCLUSIONS
- RECOMMENDATION
5.2 REFERENCES
CHAPTER ONE
1.1 INTRODUCTION
Mobile phones have become essential tools for communication and information exchange in the last two decades. Many people rely on their mobile phones in their personal lives as well as their businesses. Most mobile phone users exchange very sensitive and private information using their mobile phones assuming that the mobile phone network is reliable and secure.
GSM signal jammer is a device which blocks transmission by creating interference. This wireless signal jammer can be categorized into the Radio Frequency (RF) jammer and GSM jammer.
A Radio Frequency jammer is a device used to disrupt or prevent communication via a broadcasted RF signal. It is an RF and GSM frequency disrupter commonly known as wideband radio frequency (RF) and GSM cell phone jammer. Simultaneously, they can blocks all GSM signal transmissions within the jammer's transmission range. The device can possibly block these frequencies by transmitting a dirty signal (like noise) on the same frequency at which the GSM and radio system operates.
A GSM jammer is a device that transmits a signal on the same frequency at which the GSM operates. The jamming succeeds when the mobile phones in the area where the jammer is located are disabled.
In recent times, where bombs are being planted and detonated by GSM or Radio Frequency signals, this device can be at an advantage by jamming the signals required for the detonation of the bomb.
Presently, the mobile jammer devices are becoming civilian products rather than electronic warfare devices, since with the increasing number of the mobile phone users the need to disable mobile phones in specific places where the ringing of cell phone would be disruptive has increased. These places include worship places, university lecture rooms, libraries, concert halls, meeting rooms, and other places where silence is appreciated.
The solution to these annoying and disrupting noises is to install a device which can block the signal transmission from mobile phones and radio sets and thus, disrupt the triggering of bombs by these wireless signals.
Jamming devices overpower the cell phone by transmitting a signal on the same frequency and at a high enough power that the two signals collide and cancel each other out. Cell phones are designed to add power if they experience low-level interference, so the jammer must recognize and match the power increase from the phone.
To jam a cell phone, all you need is a device that broadcasts on the correct frequencies. Although different cellular systems process signals differently, all cell-phone networks use radio signals that can be interrupted. GSM, used in digital cellular and PCS-based systems, operates in the 900-MHz and 1800-MHz bands
Although cell phone jammers are capable of accomplishing the amazing feat of preventing cell phone communications, you may be surprised by the simplicity of these devices. In fact, cell phone jamming requires nothing more than the push of a button!
If you are a teacher or a student that is tired of other students gabbing away on their phones during class time, a classroom cell phone jammer may be exactly what you need. With these devices, you can stop the conversations instantly, prevent students from cheating on exams, and stop class disruptions caused by cell phone ringing and buzzing.
For a simple cell phone jammer that will knock out the cell phones of the students in a classroom, you won’t need a jammer that is very large or strong. In fact, you can likely use a pocket jammer, which looks like any ordinary cell phone, to keep the cell phones quiet in your classroom.
1.2 PROJECT BACKGROUND
The technology being used by this device is very simple. The mobile phone transmission is being blocked and interfered by RF which creates high noise. The frequency being generated by the jamming device jams the signal being generated by the cell tower. When the signal has been blocked, the mobile phone will show “NO NETWORK” on the network bar, and radio devices will not be able to tune into any signal. Thus, all phones and radio devices in the 200m radius of the jammer will be having the same situation.
Radio Frequency (RF) and Mobile signal jammer is an illegal device in many countries. It is because the device is blocking the signal which has been approved by government agency as a legal communication transmission system. According to the National Communications Commission (NCC) in Nigeria, “The manufacture, importation, sale, or offer for sale, of devices designed to block or jam wireless transmission is prohibited”.
1.3 STATEMENT OF PROBLEM
Due to the increasing sophistication and high technology, most people are using mobile phones, and also due to the need for man to stay updated with his environment, the use of radio is also in wide use.
Mobile phones have become a very important communication tool today. With the use of the mobile phones everywhere, it becomes annoying device while working, studying, praying and many more.
Modern technology has contributed to the sophistication of bombs which are being triggered by GSM and Radio signals.
For the course of this study, Wireless mobile jammer can be placed in schools – school mosque, and conference hall, meeting rooms, library and many more places which need quiet and peaceful environment. This device will block the transmission of GSM signals.
1.4 OBJECTIVES OF THE STUDY
When someone hears about cellphone jammers, you might have an initial overall negative impression. After all, why would someone want to cut off the communication of cell phone users?
The reality is, there are really many reasons to consider using a cell phone signal jammer — and within a variety of settings.
One place where cellphone jammers can be particularly useful is at a school or university. By blocking cell phone signals, students cannot become distracted by their phones. In addition, they cannot cheat by sending text messages to one another during exams.
High security premises, such as prisons and detention centers, can also benefits from a jammer because it can prevent illicit communication between inmates and visitors.
Of course, a cell phone jammer can also be beneficial in places such as a movie theater or a library where other patrons expect silence so they can enjoy their activities. Therefore, having a signal jammer can
* Increase security
* Prevent cheating
* Maintain a quiet atmosphere for your patrons
The reality is that signal jammers are not intended to harm. In fact, even when blocking cell phone signals, emergency services frequencies are not disturbed. So, to give yourself and your patrons the peace and quiet they deserve while still allowing those in your building or facility to remain safe, get a signal jammer.
1.4 SCOPE OF PROJECT /LIMITATION
This project only focuses on blocking the signal transmission of GSM900 which is the range between 935 to 960 MHz. This is because the components are hard to find in Nigeria for the GSM1800 frequency range between 1805 to 1880 MHz The components for GSM1800 are also very expensive compared to GSM900.
The second limitations of the project are, the device only can block the three main operators which are ETISALAT, MTN and GLOBACOM. This is because, the lines are only for Nigerian users and the frequency band range is between 935 to 960 MHz. These requirements fulfil the GSM900 specifications.
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