Matlab code for Cell Phone Jammer

[Adil Israr]

matlab using cellphone jammer

Hello, I am Telecom student and doing my final year project on Cell Phone Jammer, i need Cell Phone Jammer simulation in matlab,,plz help me as soon as possible.Thanks

 

[manish12]

matlab code for cell phone jammer

first tell me the exact function of "Cell Phone Jammer" . how it works ?

 

[Adil Israr]

cell phone jammer

I am basically working on dual band Cell phone jammer.
I will jam two GSM bands i.e; GSM 900 & GSM 1800.
It will cosists of two parts:
1)IF section
2)RF section
In the IF section following components will made;
a)Triangular wave generator (Sweep generator)
b)Noise generator
c)Mixer
d)Clamper
RF section contains following parts:
a)Two VCOs(output frequencies equal to downlink frequencies of the bands).
b)The power amplifier;

This jamming techniques is DENIAL of SERVICE:
In this 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 minimum value. This kind of jamming technique is the
simplest one since the device is always on.

Added after 3 minutes:

this is for GSM 1800. The output frequency is 1785-1900 MHz and the output
power is up to 5 dBm.

this is for GSM 900. The output frequency is 925-970 MHz and the output
power is up to 8 dBm.

Plz help me as soon as possible.

 

[kalukhana]

functioning of cellphone jammer

that jammer operating in denial of service mode may not actually require a matlab code. the circuit elements are purely analog unless you are working with a programmable VCO. but i can assure you that the jammer would still function without any programming....the VCO is the most important part but hard to find. I actually developed a circuit but upto now I've been unable to obtain a VCO. can you refer me somewhere or to junk or radio equipment, cellphone e.t.c?

 

[elghawari]

hiya I would like to ask about Cell Phone Jammer simulation in matlab, could you please send to me the simulation to elghawari@yahoo.com

Added after 35 seconds:

as soon as possible.

 

[weeny]

Matlab code for cell phone jammer

%%%%%%%%%%%%% The main.m file %%%%%%%%%%%%%%%
clear;
% Parameters of the Gaussian filter:
n1=10;sigma1=3;n2=10;sigma2=3;theta1=0;
% The amplitude of the noise:
noise=0.1;
[w,map]=gifread('lena.gif');
x=ind2gray(w,map);
filter1=d2gauss(n1,sigma1,n2,sigma2,theta);
x_rand=noise*randn(size(x));
y=x+x_rand;
f1=conv2(x,filter1,'same');
rf1=conv2(y,filter1,'same');
figure(1);
subplot(2,2,1);imagesc(x);
subplot(2,2,2);imagesc;
subplot(2,2,3);imagesc(f1);
subplot(2,2,4);imagesc(rf1);
colormap(gray);
%%%%%%%%%%%%%% End of the main.m file %%%%%%%%%%%%%%%

---------- Post added at 05:23 AM ---------- Previous post was at 05:22 AM ----------

%Initialization D=1 (D = interleaving depth)
clear;
Ts=1/1e3; % tx rate = 10k bps
NA=10000;
A=floor(rand(1,NA)+0.5);
%A=randint(1,NA);
input=A;
G=[1 0 0; 1 0 1; 1 1 1];
k=1;

N=length(channel_output);
SNRdB= -10:5:20;
SNR=10.^(SNRdB/10);
Counter=zeros(1,length(SNRdB));
loop=0;

%************************************************* **************
% AWGN + fading *
%************************************************* **************
Fd=66; % Actual fading rate
fm=round(Fd*NA*Ts);

%Generate two inputs of 1 x N matrix
xin=randn(1,(NA+2)*3);
yin=randn(1,(NA+2)*3);

%Loop for all values of frequencies and truncate at just before f=fm
for f=1fm-1)
filter(f)=1.5/(pi*fm*sqrt(1-(f/fm)^2));
end
for f=(fm-1)NA+2)*3
filter(f)=0;
end

%Inputs of the filter is multiplied with the filter transfer function
xout=xin.*filter;
yout=yin.*filter;

%Perform inverse Fourier Transform on both output
xifft=real(ifft(xout));
yifft=real(ifft(yout));

% normaliation so that E{R^2}= 1 / in Watt = 0 dB
std_x=std(xifft);
std_y=std(yifft);
xifft=xifft/std_x/sqrt(2);
yifft=yifft/std_y/sqrt(2);

%Sum the square the of the IFFT and take the square root of it
rx=sqrt(xifft.^2+yifft.^2);

%************************************************* ***************
%Calculate for all value of SNRdB in AWGN + fading
%************************************************* ***************
loop=0;
for b=sqrt(SNR) %b is the signal level
loop=loop+1;
dfad=0;
for n=1NA+2)*3 %n = no of bits
x=randn;
t=channel_output;
if t>=0.5
a=b*rx;
r=a+x;
if r<0
dfad=dfad+1; % error has occured, increase counter
Df=0;
else
Df=1;
end
else
a=(-b)*rx;
r=a+x;
if r>0
dfad=dfad+1;
Df=1;
else
Df=0;
end
end
Counterf(loop)=dfad; % w/o decode
end
output=viterbi(G,k,Df); % E is output of decoder
zf=0;
v=1;
for v=v:1:length(A);
if xor(input(1,v),output(1,v))==1
zf=zf+1;
end
end
Counter_wcf(loop)=zf;
end% loop for signal (b) in AWGN + fading


%plot simulation in AWGN + fading without coding
Pef=Counterf/N;
%semilogy(SNRdB,Pef,'b');
%hold on;
%plot simulation in AWGN + fading with coding
Pe1f=Counter_wcf/NA;
save D1_66SNRdBPe1fPef
%semilogy(SNRdB,Pe1f,'b'); %D=1 no interleaving
%hold on;

---------- Post added at 05:25 AM ---------- Previous post was at 05:23 AM ----------


:shock:
clear;
Ts=1/1e3; % tx rate = 10k bps
NA=10000;
A=floor(rand(1,NA)+0.5);
%A=randint(1,NA);
input=A;
G=[1 0 0; 1 0 1; 1 1 1];
k=1;

N=length(channel_output);
SNRdB= -10:5:20;
SNR=10.^(SNRdB/10);
Counter=zeros(1,length(SNRdB));
loop=0;

 

[ritikamehta]

Re: matlab using cellphone jammer

Hello, I am Telecom student and doing my final year project on Cell Phone Jammer, i need Cell Phone Jammer simulation in matlab,,plz help me as soon as possible.Thanks

my problem is exactly same as tours..if u have already got the solution please contact me asap...thanx

 

[ssave]

Hi... I would like to ask about Cell Phone Jammer , could you please send to me the final report to east_one@hotmail.com
as soon as possible.
thanks alot