Need help in Matlab code

Hallo , Can any one help me in matlab code.

Here is my issue..

I have one transmiter and 6 recieving channels placed at a distance of lamda/2, here i transmitted my signal i.e sinusoidal signal with rectangular envelop of frequency fc=40khz and fs=40200hz(since high frequency so alliasing effect, I choosed fs by the condition fs>fc>fs/2).Say X=A*cos(wc*t)

Once Signal is transmitted, The signal is transmitted back due to the point target (i.e i know the coordinates of the target). Now the recieving channels recieve the signal with time delay(td). I know the time delay from coordinate geometry. Now my recieved Signal is Rx=A*cos(wc(t-td))

Now what i need is i need the recieved signal from 6 channels and compare all the 6 recieved signals. In such a way that for example i transmited my signal at t=0 then the recieved signal should start from t=timedealy, And the sampling frequency is same at recieve and transmitter.

Here is my code for the signal transmitted and finding the delays and after that i need help from you to plot the delayed version of signal;

 # Item one

clear all;
clc;
%Signal Transmitting from a reference transmitter
fs=40200;%fs>fc>fs/2 for Higher frequencies due to aliasing
t=-0.1:1/fs:0.1; %in seconds
fc=40e3;% in HZ
c=1550;%in mts/sec
lamda=c/fc%in mts
wc=2*pi*fc;
A=1;
n=length(t)
x1=A*rect(t).*exp(j*wc*t);%A*sin(wc*t);
figure(1)
plot(t,x1);

 # Item two

[dpb]

If you want some help, format the code and make it legible -- too compressed to wade through as is, sorry...