Cross Correlation of tranmit and recieve signal

I am generating the ofdm modulated random transmit signal. And used usrp to recive the signal. Now I am correlating the two signals.

As the transmit signal is of the size (1*88 double), and the recived signal is of size(101888*1 double)

so I want to correlate transmit signal wiht each chunk of the recive signal with step size of transmit signal 88.

But when I correlate, I see only one peak which is strange. So i want if there is something wrong woth the code.

please see the below following code I used and suggest me the changes to be made

%Write time domain signal to binary file

file=fopen('H:\MatlabFiles\Transmit Signals\ransig\ran_trans.dat','w');

fwrite(file,x_psd);

fclose(file);

%Read binary file to time domain signal

Fsave=fopen('H:\MatlabFiles\Transmit Signals\ransig\ranrecv.dat','rb');

Data=fread(Fsave);

fclose(Fsave);

%cross corelation of signals

j=length(x_psd);

if ismatrix(Data)

[r,c]=size(Data);

for i=1:88:r %change the stepsize for the pulse generation

c=xcorr2(j,i);

figure(7),

plot(c);

end

end