64QAM demodulation - always gets same output - matlab

Question

I want to read bits from a file and then to convert them to complex double. Each number is 32 bits (16 Re and 16 Im). Then I want to use qamdemod to get 6 bits per one complex number and to save those bits in new text file.
I did that program but I always gets the same number as output 010011=50
that is the program:
% % Main Algorithm
N=16; %length of one sample
RUNTIME = input('How long you want to run in sec=');
prompt = '0 - for sequentially. 1 - for randomaly =';
n = input(prompt);
x=0;
switch n
case 0
timerID = tic; %# Start a clock and return the timer ID
disp('sequentially');
fid=fopen('rand.bin'); %need to check if file opened
fid_w=fopen('samples.txt','w'); %write to file
while true
%# Perform process
Re=fread(fid,N);
Re=Re'; %transpose to row vector
Im=fread(fid,N);
Im=Im'; %transpose to row vector
if size(Re)~=N
disp('Re is out of range');
break;
end
if size(Im)~=N
disp('Im is out of range');
break;
end
Re_dec=bi2de(Re);
Im_dec=bi2de(Im);
in = (Re_dec/65535) + (Im_dec*(1i)/65535); % unit circle 65535
double(in);
disp("IN:");
disp(in);
out = qamdemod(in,64);
data_out = de2bi(out);
disp(data_out);
fprintf(fid_w,'%f\n',in); %write to sample file
if (feof(fid))
disp('end of file');
break;
end
if(toc(timerID) > RUNTIME) %# Get the elapsed time for the timer
disp('end of time');
break;
end
end
case 1
disp('randomaly')
otherwise
disp('error')
end
fclose('all'); %close all open files
% out = lteSymbolDemodulate(in,'64QAM');

Answer 1

qamdemod was not working correctrly: the right code is:
% % Main Algorithm
RUNTIME = input('How long you want to run in sec=');
prompt = '0 - for sequentially. 1 - for randomaly =';
n = input(prompt);
x=0;
N=16;
fid=fopen('rand.bin'); %need to check if file opened
fid_w=fopen('samples.txt','w'); %write to file
switch n
case 0
disp('sequentially');
sequentially(fid,fid_w,RUNTIME); %call sequentially function
case 1
disp('randomaly');
randomaly(fid,fid_w,RUNTIME); %call randomaly function
otherwise
disp('Error: Wrong select')
end
fclose('all'); %close all open files
fid=fopen('samples.txt'); %need to check if file opened
digest=entropy(fid); %Creating entropy
disp(digest);
fclose('all'); %close all open files
function sequentially(fid,fid_w,RUNTIME)
N=16; %length of one sample
timerID = tic; %# Start a clock and return the timer ID
while true
%# Perform process
Re_bin=fread(fid,N);
if size(Re_bin')~=N
disp('Re is out of range');
break;
end
% disp("Re_bin=");
% disp(Re_bin');
Re=convert_to_number(Re_bin);
Im_bin=fread(fid,N);
if size(Im_bin')~=N
disp('Im is out of range');
break;
end
Im=convert_to_number(Im_bin);
in=complex(Re,Im);
% disp("IN:");
% disp(in);
out = conv_qam64(in);
% disp("OUT:");
% disp(out);
%%%%%%%% if want binary can use bin_out to convert %%%%%%%%%
% bin_out=dec2bin(out);
% disp("OUT BIN:");
% disp(bin_out);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
fprintf(fid_w,'%2.0f\n',out); %write to sample file
if (feof(fid))
% disp('end of file');
break;
end
if(toc(timerID) > RUNTIME) %# Get the elapsed time for the timer
% disp('end of time');
break;
end
end
% fclose('all'); %close all open files