# Chirp signal display in matlab

Started by January 29, 2008
Hi,
Can anybody help me display the following chirp signal in matlab??

s_tx = A*rect(tau/Tp)*exp(j*2*pi*fc*tau + j*pi*K*tau^2);

I do not know how to code 'rect' function in matlab.
You can assume arbitrary values for the quantities.
Thanks.
A rect function is 1 within a certain range and then 0 outside. So all you
have to do
to code the "rect" function is to make sure that s_tx is 0 outside of
(-tau/Tp,tau/Tp)

If you really want to "code" it, you can create a vector with 1s within
(-tau/Tp,tau/Tp)
and 0 outside and then do a .* (note the dot) with your exp() function.

Nandan

On Jan 28, 2008 8:34 AM, Ishtiaque Ahmed wrote:

> Hi,
> Can anybody help me display the following chirp signal in matlab??
>
> s_tx = A*rect(tau/Tp)*exp(j*2*pi*fc*tau + j*pi*K*tau^2);
>
> I do not know how to code 'rect' function in matlab.
> You can assume arbitrary values for the quantities.
> Thanks.
>
Hello,
I need to know how to find the Chirp rate in a chirp signal. 'K' is the chirp rate in the following equation:
s_tx = A*rect(tau/Tp)*exp(j*2*pi*fc*tau + j*pi*K*tau^2);

Hopr to hear. Thanks.

*Thanks to Nandan.

Nandan Das wrote:
A rect function is 1 within a certain range and then 0 outside. So all you have to do
to code the "rect" function is to make sure that s_tx is 0 outside of (-tau/Tp,tau/Tp)

If you really want to "code" it, you can create a vector with 1s within (-tau/Tp,tau/Tp)
and 0 outside and then do a .* (note the dot) with your exp() function.

Nandan

On Jan 28, 2008 8:34 AM, Ishtiaque Ahmed wrote:
Hi,
Can anybody help me display the following chirp signal in matlab??

s_tx = A*rect(tau/Tp)*exp(j*2*pi*fc*tau + j*pi*K*tau^2);

I do not know how to code 'rect' function in matlab.
You can assume arbitrary values for the quantities.
Thanks.