title: To find FM signal's phase in Matlab
body: <p>I want to find the phase of an FM signal. Matlab code of message signal is </p>
  
  <pre><code>m= ones(1,Fs); 
  m= [m(1:round(.4*Fs))*1, m(round(.4*Fs)+1:round(.7*Fs))*-2 ...
      m(round(.7*Fs)+1:Fs)*0];
  </code></pre>
  
  <p>How can I find phase of FM signal?</p>