please check this code and give me the suggestion about this , this is OFDM TX

[hakrajput]

% No.of Carriers: 64
% Single frame size: 68 bits
% Total no. of Frames: 100
% Modulation: 16-QAM
% No. of Pilots: 4
% Cylic Extension: 25%(16)

close all
clear all
clc


%OFDM TRANSMISSION
%% Block 1 (SERIAL DATA SOURCE GENERATOR)

% Generating and coding data
t_data=randint(9600,1)';
x=1;
si=1; %for BER rows
FS=4096; %IFFT/FFT length
Kmax=1705; %number of subcarriers
Kmin=0;
%%
for d=1:100;
data=t_data(x:x+95);
x=x+68;
k=3;
n=6;
s1=size(data,2); % Size of input matrix
j=s1/k;
end %%(ye line mai ny dali hai)

%%
% Convolutionally encoding data
constlen=7;
codegen = [171 133]; % Polynomial
trellis = poly2trellis(constlen, codegen);
codedata = convenc(data, trellis);

%%
%Interleaving coded data

s2=size(codedata,2);
j=s2/4;
matrix=reshape(codedata,j,4);

intlvddata = matintrlv(matrix',2,2)'; % Interleave.
intlvddata=intlvddata';

%%
% Binary to decimal conversion

dec=bi2de(intlvddata','left-msb');


%%
%% 16 QAM MODULATION

M=16;
y = qammod(dec,M);
%Figure(1);

scatterplot % malsa ho ga tou change kro ga
%plot;

%%
% Pilot insertion

lendata=length;
pilt=3+3j;
nofpits=4;

k=1;

for i=(1:13:52)

pilt_data1(i)=pilt;

for j=(i+1:i+12);
pilt_data1(j)=y(k);
k=k+1;
end
end


pilt_data1=pilt_data1'; % size of pilt_data =52
pilt_data(1:52)=pilt_data1(1:52); % upsizing to 64
pilt_data(13:64)=pilt_data1(1:52); % upsizing to 64

for i=1:52

pilt_data(i+6)=pilt_data1(i);

end

% Zero Pading
% edit yahan sy start kia hai dobara

N=Kmax+1;
a=-1+2*round(rand(N,1)).'+i*(-1+2*round(rand(N,1)).');
A=length(a);
info=zeros(FS,1);

info(1A/2))= [ a(1A/2)).'];
info((FS-((A/2)-1)):FS)= [ a(((A/2)+1):A).'];
carriers=FS.*ifft(info,FS);
%carriers=info:FS
%UPCONVERTER
L=length(carriers);
delay=64; % Reconstruction filter delay

%%
% IFFT
figure(2);
ifft_sig=ifft(pilt_data',64);
%time=(1:length(carriers))'/FS
time=(1:length(carriers))
plot(time,ifft_sig)



i failed to plot ifft , i received this message "vector must be of same length "
please tell me friend how to resolve this