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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:

sreevenkjan

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

shoaib19

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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
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sreevenkjan

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

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