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can any one remove the errors in this code of matlab

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shoaib19

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% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% MIMO-OFDM CCDF CURVES
 
 
clear
clc
AoD = 2*pi;   %Angle of Departure
AoA = 2*pi;   %Angle of Arrival
dt  = 0.3;   %antenna separations at transmiter in lambda 
dr  = 0.3;   %antenna separations at receiver in lambda
nt_v=[2 4 8];
nr_v=[2 4 8];
noise_variance=1e-4;%Noise Variance
SNR_db_v=0:2:10;%SNR Vector in db
SNR_v=10.^((SNR_db_v)/10);%db to power conversion
%for k=1
    nt = nt_v(1);
    nr = nr_v(1);
for i=1:length(SNR_v)
        Pt=noise_variance*SNR_v(i);%total power 
for j=1:10000
         [TCM ,RCM , CCM , MCM ] = ChannelEstimation( nt,nr,dt,dr,AoD,AoA);
        ChannelMatrix=MCM;
        [Capacity_WF(i,j),Capacity(i,j)]=waterfilling(ChannelMatrix,Pt,noise_variance);%applying water filling
end
end
 
 
%end
C1=(Capacity_WF(1,:));
C2=(Capacity_WF(2,:));
C3=(Capacity_WF(3,:));
C4=(Capacity_WF(4,:));
C5=(Capacity_WF(5,:));
C6=(Capacity_WF(6,:));
[a,b]=hist(C1,25);
[c,d]=hist(C2,25);
[e,f]=hist(C3,25);
[g,h]=hist(C4,25);
[i,j]=hist(C5,25);
[k,l]=hist(C6,25);
a=a/sum(a);
c=c/sum(c);
e=e/sum(e);
g=g/sum(g);
i=i/sum(i);
k=k/sum(k);
f1=figure(1)
 
plot(b,1-cumsum(a),'-ob',d,1-cumsum(c),'-*r',f,1-cumsum(e),'->m',h,1-cumsum(g),'-<g',...
                    j,1-cumsum(i),'-sk',l,1-cumsum(k),'-^c','LineWidth',2);
 
xlabel('Capacity (bps/Hz)')
ylabel('Probability (Capacity(bps/Hz))')
grid on
set(f1,'color',[1 1 1])
hold off
 
 
function [TCM ,RCM ,CCM ,MCM ] = ChannelEstimation( Ntx,Nrx,dt,dr,AOD,AOA)
 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
 
 
%MIMO CHANNEL ESTIMATION
 
% OUTPUT VARIABLES 
%  TCM = Transmitter Correlation Matrix
%  RCM = Receiver Correlation Matrix
%  CCM = Channel Covariance Matrix
%  MCM = MIMO Channel Matrix 
% INPUT VARIABLES
%  Ntx = No of trasmit antennas
%  Nrx = No of receive antennas
%  dt  = antenna seperation at transmitter in lambda
%  dr  = antenna seperation at receiver in lambda
%  AOA = angle of departure in radians
%  AOA = angle of arrival in radians
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%    
 
% Initializing
 Pr=zeros(Nrx,Ntx);
 Pt=zeros(Nrx,Ntx);
 vec_r=zeros(1,Nrx*Ntx);
 H=zeros(Nrx,Ntx);
 
% Receiver Correlation Matrix Generation
 
for i=1:Nrx;
for j=1:Nrx;
            Pr(i,j)=besselj(0,AOA*dr*abs(j-i));
end;
end;
 
RCM=Pr;
 
% Transmitter Correlation Matrix Generation
 
for i=1:Ntx;
for j=1:Ntx;
            Pt(i,j)=besselj(0,AOD*dt*abs(j-i));
end;
end;
 
TCM=Pt;
 
% Channel Covariance Matrix Generation
 
 
CCM=kron(Pt,Pr);
 
% MIMO Channel Matrix Generation
 
    [V,D] = eig(CCM);
    G=V*sqrt(D);
    r=random('rician',1,Nrx,Ntx);
for j=1:Ntx;
for i=1:Nrx;
            vec_r(i+(j-1)*Nrx)=r(i,j);
end;
end;
 
    vec_H=G*vec_r';
for j=1:Ntx;
for i=1:Nrx;
           H(i,j)=vec_H(i+(j-1)*Nrx);
end;
end;
 
MCM=H;
 
 
 
 
end
 
 
 
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
 
 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%INITIALIZING%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
clear
clc
AoD     =   0:pi/3:2*pi;         %Angle of Departure
AoA     =   0:pi/3:2*pi;         %Angle of Arrival
dt_vec      =   [0.2 0.3 0.4 0.5];   %antenna separations at transmiter in lambda 
dr_vec      =   [0.2 0.3 0.4 0.5];   %antenna separations at receiver in lambda
color = ['-ob';'->r';'-*m';'-^g';];
numTx   =   2;                   % number of transmit antennas
numRx   =   2;                   %number of receive antennas
 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
for i=1:4
    dt = dt_vec(i);
    dr = dr_vec(i);
 
for j=1:length(AoD)
 
    [TCM ,RCM , CCM , MCM ] = ChannelEstimation( numTx,numRx,dt,dr,AoD(j),AoA(j));
 
 
            a_12(j)=RCM(1,2)
            b_12(j)=TCM(1,2)
 
 
 
end
 
    f1 = figure(1);
    hold on
   plot(AoD,a_12,color(i,:),'LineWidth',2);
 
    axis([0 2*(pi) -1 1])
    grid on
    set(f1,'color',[1 1 1])
    set(gca,'xtick',0:pi/3:2*(pi));
 
    set(gca,'xticklabel',{'0', '60' , ...
'120', '180','240','300',' 360'})
 
    xlabel('Angle of Departure/Arrival in Degree')
    ylabel('Transmitter/Receiver Spatial Correlation Coefficient')
    hold off
 
 
end
 
 
 
%OFDM modulation of one subframe of random uniformly-distributed noise,
%   using a 10MHz 2-antenna configuration.
    clc
 
    enb = struct('NDLRB',6,'CyclicPrefix','Normal','CellRefP',2)
    dims = lteDLResourceGridSize(enb)
    grid = complex(rand(dims)-0.5,rand(dims)-0.5);
    waveform = lteOFDMModulate(enb,grid)
    plot(real(10*log10(fft(waveform))))
 
 
 
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED   
 
% MIMO-OFDM System (Transmiter----MIMO_Channel----Receiver)
 
 
 
 
 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%Initializing%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%                            
clc
clear
    n              =   256;    % Number of bits to process
    M              =   16;     % Size of signal constellation
    s              =   64;     %total number of subcarriers
    k              =   log2(M);% Number of bits per symbol
    Guard_Interval =   s/4;    % Guard interval length
    numTx          =   2;      % number of transmit antennas
    numRx          =   2;      %number of receive antennas
    Rs             =   20e6;   %Signal Sample Rate  20MHz(LteSpecification)
    maxDopp        =   30;     %MaximumDopplerShift
    SNR            =   20;     %SNR in db
    tu             =   3.2e-6; %useful symbol period
    tg             =   0.8e-6; %guard interval length
    ts             =   tu+tg;  %total symbol duration
    scb            =   312.5e3;%sub carrier spacing
    fc             =   3.6e9;  %carrier frequency
    AoD            =   2*pi;   %Angle of Departure
    AoA            =   2*pi;   %Angle of Arrival
    dt             =   0.20;   %antenna separations at transmiter in lambda 
    dr             =   0.15;   %antenna separations at receiver in lambda
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%Transmitter%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%                        
 
%----------------------------%DATA GENERATION-----------------------------%
 
x= randi([0 1],n,1) 
xsym = bi2de(reshape(x,k,length(x)/k).','left-msb');
 
%------------------------SYMBOLS MAPPING (16-QAM)-------------------------% 
 
QAM16_Modulator = comm.RectangularQAMModulator(16,...
'NormalizationMethod','Average power',...
'SymbolMapping', 'Custom', ...
'CustomSymbolMapping',...
                         [11 10 14 15 9 8 12 13 1 0 4 5 3 2 6 7]);
 
mod_sig = step(QAM16_Modulator ,xsym);% Mapping(16-QAM Modulation)
 
%------------------------MIMO OSTBC (ALAMOUTI)----------------------------%
 
hAlamoutiEnc = comm.OSTBCEncoder(...
'NumTransmitAntennas',2);
 
encData = step(hAlamoutiEnc, mod_sig);%MIMO Coding(ALAMOUTI)
 
%------------------------OFDM MODULATION(IFFT)----------------------------%
 
x1=encData(:,1); %data stream 1
x2=encData(:,2); %data stream 2
%x3=encData(:,3); %data stream 3
%x4=encData(:,4); %data stream 4
 
Data_IFFT1=ifft(x1,s);%OFDM Modulation(IFFT)on data stream 1
Data_IFFT2=ifft(x2,s);%OFDM Modulation(IFFT)on data stream 2 
%Data_IFFT3=ifft(x3,s);%OFDM Modulation(IFFT)on data stream 3
%Data_IFFT4=ifft(x4,s);%OFDM Modulation(IFFT)on data stream 4
 
%------------------------CYCLIC PREFIXING---------------------------------%
 
OFDM_Sym1= [Data_IFFT1(s- Guard_Interval + 1 : s);Data_IFFT1]; 
OFDM_Sym2= [Data_IFFT2(s- Guard_Interval + 1 : s);Data_IFFT2];
 
%OFDM_Sym3= [Data_IFFT3(s- Guard_Interval + 1 : s);
%OFDM_Sym4= [Data_IFFT4(s- Guard_Interval + 1 : s);
 
%---------------------DIGITAL TO ANALOG CONVERSION------------------------%
 
tt=0:  5.0000e-08:ts- 5.0000e-08;
OFDM_BPS1=(OFDM_Sym1'.*(exp(1j*2*pi*fc*tt)));
OFDM_BPS1=OFDM_BPS1';
OFDM_BPS2=(OFDM_Sym2'.*(exp(1j*2*pi*fc*tt)));
OFDM_BPS2=OFDM_BPS2';
%OFDM_BPS3=(OFDM_Sym3'.*(exp(1j*2*pi*fc*tt)));
%OFDM_BPS3=OFDM_BPS3'
%OFDM_BPS4=(OFDM_Sym4'.*(exp(1j*2*pi*fc*tt)));
%OFDM_BPS4=OFDM_BPS4'
 
Data=horzcat(OFDM_BPS1,OFDM_BPS2);
 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%Channel%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[TCM ,RCM , CCM , MCM ] = ChannelEstimation( numTx,numRx,dt,dr,AoD,AoA);
 
hChan = comm.MIMOChannel(...
'SampleRate',               Rs,...
'MaximumDopplerShift',      maxDopp,...
'TransmitCorrelationMatrix',TCM,...
'ReceiveCorrelationMatrix', RCM,...
'PathGainsOutputPort',      true);  
 
AWGN= comm.AWGNChannel(...
'NoiseMethod', 'Signal to noise ratio (SNR)',...
'SNR',SNR,...
'SignalPower', 1);
 
[chanOut, pathGains] = step(hChan,Data); % MIMO Rayleigh Fading Channel 
rx= step(AWGN, chanOut); %Adding AWGN noise 
 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%Receiver%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
%-----------------------------SIGNAL RECEPTION----------------------------%
 
rxSignal=rx;
y1=rxSignal(:,1); %received data frrom antenna 1
y2=rxSignal(:,2); %received data frrom antenna 2
 
%---------------------ANALOG TO DIGITAL CONVERSION------------------------%
 
OFDM_rx1=(y1'.*(exp(1j*2*pi*fc*tt)));
OFDM_rx1=OFDM_rx1';
OFDM_rx2=(y2'.*(exp(1j*2*pi*fc*tt)));
OFDM_rx2=OFDM_rx2';
 
%------------------------REMOVING CYCLIC PREFIX---------------------------%
 
Data1_Removeal_Gaurd  = OFDM_rx1(Guard_Interval+1:s+Guard_Interval); 
Data2_Removeal_Gaurd  = OFDM_rx2(Guard_Interval+1:s+Guard_Interval);
 
%------------------------OFDM DEMODULATION (FFT)--------------------------%
 
Data_FFT1=fft(Data1_Removeal_Gaurd ,s);
Data_FFT2=fft(Data2_Removeal_Gaurd,s);
g=zeros(16,1);
Data_ZP1=[g;Data_FFT1];
Data_ZP2=[g;Data_FFT2];
Data2=horzcat(Data_ZP1,Data_ZP2);
 
%---------------------MIMO DECODING(ALAMOUTI DECODING)--------------------%
 
 
hAlamoutiDec =comm.OSTBCCombiner(...
'NumTransmitAntennas',2,...
'NumReceiveAntennas', 2);
 
decData = step(hAlamoutiDec, Data2,squeeze(pathGains));
decData_rzp=decData(length(g)+1:s+Guard_Interval);
 
 
%-----------------SYMBOLS DECODING(16-QAM DEMODULATION)-------------------%
 
QAM16_DeModulator = comm.RectangularQAMDemodulator(...
'ModulationOrder', 16, ...
'NormalizationMethod', 'Average power',...
'SymbolMapping', 'Custom', ...
'CustomSymbolMapping',...
                         [11 10 14 15 9 8 12 13 1 0 4 5 3 2 6 7]);
 
 
 zsym = step(QAM16_DeModulator ,decData_rzp);
 
%-----------------OBTAINING BINARY INFORMATION----------------------------%
 
 
 z = de2bi(zsym,'left-msb');%Convert integers to bits
 z = reshape(z.',numel(z),1)%
 
 
 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%BIT ERROR RATE ANALYSIS%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
hError = comm.ErrorRate;
q = step(hError,x,z)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
 
 
clear
clc
AoD = 2*pi;   %Angle of Departure
AoA = 2*pi;   %Angle of Arrival
dt  = 0.3;   %antenna separations at transmiter in lambda 
dr  = 0.3;   %antenna separations at receiver in lambda
nt_v=[2 4 8];
nr_v=[2 4 8];
color = ['-ob';'->r';'-*m'];
color1 = ['-^g';'-sk';'-*y'];
noise_variance=1e-4;%Noise Variance
SNR_db_v=-10:3:20;%SNR Vector in db
SNR_v=10.^((SNR_db_v)/10);%db to power conversion
for k=1:3
    nt = nt_v(k);
    nr = nr_v(k);
for i=1:length(SNR_v)
        Pt=noise_variance*SNR_v(i);%total power 
for j=1:1000
         [TCM ,RCM , CCM , MCM ] = ChannelEstimation( nt,nr,dt,dr,AoD,AoA);
        ChannelMatrix=MCM;
        [Capacity_WF(i,j),Capacity(i,j)]=waterfilling(ChannelMatrix,Pt,noise_variance);%applying water filling
end
end
%%plotting the curves of capacity
    f1 = figure(1);
    hold on
    plot(SNR_db_v,mean(Capacity'),color(k,:),SNR_db_v,mean(Capacity_WF'),color1(k,:),'LineWidth',2);
end
 
    grid on
    set(f1,'color',[1 1 1])
    xlabel('SNR in dB')
    ylabel('Capacity bits/s/Hz')
 
    hold off
 
function [P] = Powerr(threshold,noiseVariance,temp,j)
 
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED   
 
%Calculating the optimal power for each channel
 
        P=threshold-(noiseVariance/temp(j));
end
 
    function [ th ] = threshold( gain_2,totalPower,noiseVariance,rank )
 
 
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
 
%Calculating the value of inverse of Lagrange multiplier that is the
%threshold value
 
    temp_2=0;
for i=1:rank
    temp_2=temp_2+(noiseVariance/gain_2(i));
 
end
th=(totalPower+temp_2)/rank;
end
 
 
function[ Capacity,Capacity_1]= waterfilling( channelMatrix,totalPower,noiseVariance )
 
 
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED
% ENGINEER SHOAIB MUSHTAQ  M.SHERYAR QAZI   MUZZAMMIL AHMED 
%Water filling Algorithm for optimal power allocation in MIMO-OFDM
%System%
 
    [U D V]=svd(channelMatrix);
    gain=diag(D);
    rank=nnz(gain);
    temp=gain.^2;
    j=rank;
    l=rank;
    p = zeros(1,rank);
 
while(rank>0)
        th=threshold(temp,totalPower,noiseVariance,rank);
        p(j)=Powerr(th,noiseVariance,temp,j);
 
if (p(j)>=0)
for k=rank-1:-1:1;
                p(k)=Powerr(th,noiseVariance,temp,k);
 
end
break
else
            p(j)=0;
            rank=rank-1;         
            j=j-1;
 
end
 
end
%%Calculating channel Capacity with Water Filling
            Capacity=0;
for i=1:1:l
                Capacity=Capacity+(log2(1+((temp(i)*p(i))/(noiseVariance))));
end
            shanoncapacity=sprintf('Capacity with Waterfilling are = %f bits/sec/Hz %s',Capacity);
%%Calculating channel Capacity with Out Water Filling
            Capacity_1=0;
            P=totalPower/l;
for i=1:1:l
                Capacity_1=Capacity_1+(log2(1+((temp(i)*P)/(noiseVariance))));
end
            shanoncapacity_1=sprintf('Capacity with out Waterfilling are = %f bits/sec/Hz %s',Capacity_1);

 
Last edited by a moderator:

can you post what error message you are getting on your Matlab compiler screen??. run the program and post the error you get.
 

can you post what error message you are getting on your Matlab compiler screen??. run the program and post the error you get.

i attached the pdf file in this file plz you can copy the code see the error and if possible plz remove error and send it to me
 

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  • thesis final with improvements (hassan).pdf
    2.2 MB · Views: 155

post the error which u are getting in the screen..it will be much faster to debug.
 

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