ISSN 2319-8885 Vol.03,Issue.30 October-2014,

Pages:5929-5932

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Advanced Mobile Signal Jammer for GSM, CDMA and Networks with Prescheduled Time Duration using ARM7 TDMI Processor Based LPC2148 Controller 1 2 KAKU RAMAKRISHNA , TULASI SANATH KUMAR 1PG Scholar, Dept of ECE, ASCET, Gudur, Andhrapradesh, India. 2Assistant Professor, Dept of ECE, ASCET, Gudur, Andhrapradesh, India.

Abstract: This Paper is designed and implemented for signal jammers for GSM, CDMA and 3G networks with prescheduled time duration using ARM7.the mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use .this case enough interference with the communication between mobile phone and communicating towers to render the phones unusable .upon activating mobile jammers all mobile phones will indicate “NO NETWORK AVAILABLE” . Incoming calls are blocked as if the mobile phone were off. When the mobile jammers are turned off, all mobile phones will automatically re-establish communications and provide full service .the activation and deactivation time schedules can be programmed with microcontroller. Real time clock chip DS1307 is used to set the schedule. In this project we have a jammer section, microcontroller. RTC and GSM modem .this information is given to the microcontroller will send data to GSM just before the select time and GSM will send message to the users whose number are programmed in the GSM that the jammer is going to active and communication will be stopped. After message sent by GSM. Mobile jammer circuit will active and signal are jammed or blocked.

Keywords: Mobile Jammer, ARM7.RTC, GSM Modem.

I. INTRODUCTION particularly disruptive because silence is expected. As with Communication jamming device were first developed and other radio jamming, cell phone jammers block cell phone used by military. This interest comes from the fundamental use by sending out radio waves along the same frequencies objective of denying the successful transport of information that cellular phone use. These causes enough interface with from the sender (tactical commander) to the receiver (the the communication between cell phones and towers to radar army personnel), and vice-versa. Nowadays, mobile phones the phones unusable. On most retail phones, the network are becoming essential tool in our daily life. The technology would simply appear out of range. Most cell phones use behind cell phone jamming is very simple. The widely use different bands to send the mobile phone could create some problems as the sound of ringing becomes annoying or disrupting. This could happen in some places like conference room, aw court, libraries, lecture room and mosques. The jamming device broadcasts an RF signal in the frequency range reserved for cell phones that interference with the cell phone signal, which results in a “no network available” display on the cell phone screen. All phones with in the effective radius of the jammer are science. It should be mentioned that cell phone jammers are illegal devices in most countries.

II. RELATED WORK A. Mobile jammer A mobile phone jammer is an instrument used to prevent cellular phones from receiver signal from based station. When used, the jammer effectively disables cellular phones (fig 1). This device can be used in practically any location, but are found primarily in places where a phone call would be particularly in places where a phone call would be Figure 1. basic principal mobile signal jammer.

Copyright @ 2014 IJSETR. All rights reserved. KAKU RAMAKRISHNA, TULASI SANATH KUMAR and receive communications from towers (called frequency 1. Power supply division depleting, FDD). Jammers can work by either Smaller jamming device are battery operated. Some look disrupting phone to tower frequencies or tower to phone like cell-phone batteries. Stronger device can be plugged into frequencies. Smaller handheld models block all bands from a standard outlet or wired in to a vehicle‟s electrical system. 800 MHz to 1900 MHz within a 30-foot range (9meters). Small devices tend to used the former method, while larger 2. Circuitry more expensive models many interfere directly with the The main electronic components of a jammer are: tower. The GSM jammer is a device that transmit signal on Voltage-controlled oscillator: generates the radio signal that the same frequency at which the GSM system operates, the will interface with the cell phone signal. jamming success when the mobile phone in the area where the jammer is located can‟t communicate, the basic idea Tuning circuit: controls the frequency at which the jammer military use that was called denial of service attack. Mobile broad cast its signal by sending a particular voltage to the jammer is used to prevent mobile phone from receiving or oscillator transmitting signal with the base stations. When used, the jammer effectively disables cellular phones as shown in fig 2. Noise generator: produces random electronic output in a There are several ways to jam an RF device. The three most specified frequency range to jam the cell-phone network common techniques can be categorized as follows: signal (part of the tuning circuit)

Spoofing: In this kind of jamming, the device forces the RF amplification (gain stage): boost the power of the radio mobile to turn off itself. This type is very difficult to be frequency output to high enough level to jam a signal implemented since the jamming device first detects any Check your phone: if the battery on your phone is okay and mobile phone in a specific area, then the device sends the you‟d like to continue your conversation, try walking away signal to disable the mobile phone .some type of this from the the area. You may be able to get out of the jammer‟s technique can detect if a nearby mobile phone is there and range with just a few steps. sends a message to tell the user to switch the phone to the (intelligent disablers). 3. Every jamming device has an antenna to send the signal. Shielding attacks: This is known as TEMPEST or EMF Some are contained rical cabinet. On stronger device, shielding. This kind required closing an area in a faraday antennas are external to provide longer range and tuned for cage so that any device inside this cage cannot transmit or individual frequencies. The effect of jamming depends on the receiver RF signal from outside of the cage. This area can be jamming-to- signal ratio (j/s), modulation schema, channel large as buildings. coding and interleaving of the target system. Generally jamming-to- signal ratio can measure according to the Denial of service: This technique is referred to DOS. In this following equation technique, the device transmits a noise signal at the same operating frequency of the mobile phone in order to decrease the signal -to-noise ratio (SNR) of the mobile under its (1) minimum value. This kind of jamming technique is the simplest one since the device is always on. Our device is of Pj=jammer power, Pt-transmitter power, Gjr=antenna gain this type. from jammer to receiver, Grj=antenna gain from receiver to jammer , Gtr=antenna gain from transmitter to receiver , Grt=antenna gain from receiver to transmitter, Br=communication receiver , Bj=jamming transmitter bandwidth, Rtr=rang between communication transmitter and receiver, Rjt=range between jammer and communication receiver, Lr=jammer signal loss, Lr=communication signal loss

Jammers simply overflow the frequency used by phones with radio waves. Jamming signal needs enough Figure2. Block diagram of the jammer device. power to collide and cancel GSM signal. Cell phones are designed to increase their power when facing low level A. Component of mobile jammer interface. Jammer should recognize that power. Power of Electronically speaking, cell-phone jammers are very jamming signal should match the power increase from the basic device. The simplest just have an on/off and a light that phone. Sophisticated jammers can block several networks to indicates it‟s on. More complex device have switches to head off dual or tri-mode phone that automatically switch activate jamming at different frequencies. Components of among different network to find open signal. High end device jammer include: can block all frequencies. GSM(global system for mobile

International Journal of Scientific Engineering and Technology Research Volume.03, IssueNo.30, October-2014, Pages: 5929-5932 Advanced Mobile Signal Jammer for GSM, CDMA And 3G Networks with Prescheduled Time Duration using ARM7 TDMI Processor Based LPC2148 Controller communication) ranges erope900 MHz, asia-1800 MHz, mechanism are much simpler than those of complex USA-1.9 MHz (fig 3 and 4). instruction set computer (CISC) design.

D. Liquid-crystal display (LCD) A flat panel display electronic visual display that uses the light modulation properties of liquid crystal. Liquid crystals do not emit light directly. LCD are available to display arbitrary image or fixed image which can be displayed or hidden, such as preset words, digits, and 7- segment displays as in a digital clock. They use the same basic technology, except that arbitrary image is made up of a large number of small pixels, while other displays have large elements.

E. Global system for mobile communication (GSM) GSM/GPRS RS232 modem from rhydo LABZ is built with SIMCOM make sim900 quad-band GSM/GPRS engine .GSM, which stands for global system for mobile communication, reigns (important) as the world‟s most Figure 3. Passing of jammer signals in half –duplex and widely used cell phone technology. Cell phones use a cell full-duplex mode. phone service carrier‟s GSM network by searching for cell phone towers in the nearby area. Global system for mobile communication (GSM) is globally accepted standard for digital cellular communication. GSM is the name of a standardization group established in 1982 to create a common European mobile telephone standard that would formulate specification for a pan-European mobile cellular radio system operating at 900 MHz it is estimated that many countries outside of Europe will join the GSM partnership.

TABLE 1: OPERATING FREQUENCY BANDS

Figure 4. Working of jammers.

B. Micro controller This section forms the control unit of the whole project. This section basically consists of a microcontroller with its associated circuitry like crystal with capacitors, reset circuit, In our design, the jamming frequency must be the same pull up resistors (if needed) and so on. The microcontroller the downlink, because it needs lower power to do jamming forms the heart of the project because it controls the drives then the uplink rang and there is no need to jam the base begins interfaced and communicates with the drives station itself. So, our frequency design will be as follows: according to the program being written. a microcontroller is a small computer on a single integrated circuit consisting of a GSM 900------935-960 MHz relatively simple CPU combined with support function such as crystal oscillator ,timers, watchdog timer, serial and analog GSM 1800 1805-1880 MHz i/o etc. microcontroller are also used in specific, high technology, and aerospace projects. Microcontrollers are The CDMA frequency range will be 860-894 MHz (Asia designed for small or dedicated application. & Europe) and 850-894 MHz (United States).

C. ARM7TDMI III. HARDWEARE IMPLEMENTATION ARM is the abbreviation of advanced RISC machines, it The below fig 5 is the block diagram of the system that to the names of a class of processor, and is the name of kind set the scheduled time duration for mobile jammer. The technology too. The RISC instruction set, and related decode activation and deactivation time schedules can be International Journal of Scientific Engineering and Technology Research Volume.03, IssueNo.30, October-2014, Pages: 5929-5932 KAKU RAMAKRISHNA, TULASI SANATH KUMAR programmed with microcontroller. In order to run the RTC legal inside bank, often used also in libraries. United (real time clock) one crystal oscillator is externally Kingdom: illegal to use, but legal to interfaced, an oscillator is an electronic circuit that produces a repetitive electronic signal. The power supply interfaced it IV. CONCOLUSION is used to battery backup for the purpose of update the time This paper is successfully completed using mobile jammer when the absence of power. The A.C input i.e., 230v from and ARM7.by this system we can deactivate all the mobile the mains supply is step down by the transformer to 12v and signals at any locations. We designed a device that stops is fed to a rectifier. One reset button interface, Reset is used phone ringing in particular time period. This device could be for putting the microcontroller into a „known‟ condition. That used in places where ringing is not desired at specific times, partially means that microcontroller can behave rather as these ringing may disturb people in such place. The design inaccurately under certain undesirable condition. In order to drive works in dual band. It jams both the GSM900 and continuous its proper functioning it has to be reset. Relay is GSM1800 bands. The device was able to jam the three main an electrically controllable switch widely used in industrial cell phone carriers in Jordan controls, automobile and appliances. V. REFERENCE [1] www.howstuffwork.com. [2] en.wikipedia.org/wiki/mobile_phone_jammer. [3] multitopic conference2008.INMIC 2008. [4]ccnga.uwaterloo.ca/jscouria/GSM/gsmreporter.html. [5]ieeee explore.com. [6]”zone of scilence[cell phone jammer],”spectrum, ieee Vol.42,no.5,18,may2005.

Figure 5: block diagram system.

One LCD (liquid crystal display) also interface in this micro controller, it is flat electronic visual display that used that use the light modulating properties of liquid crystals. These components are specialized for being used with the microcontrollers, which means that they cannot be activated by standard IC circuits. RTC (real time clock) is interface because it is widely used device that provides accurate time and date for many applications. LED indicator interface in this microcontroller it have a life of at last ten years and consumer 90 percent less power than conventional indicators, depend on the type of the materials (Ga, AS, p).

A. Legal Issues India: government and schools use jammers. United States: illegal to operate, manufacture, import, or offer of up to $11,000 and imprisonment of up to one year. Pakistan:

International Journal of Scientific Engineering and Technology Research Volume.03, IssueNo.30, October-2014, Pages: 5929-5932