Reflecting impulse response with respect to y-axis

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Greetings, I have a discrete-time signal at the +x-axis. I'm having a problem to reflect the signal with respect to the y-axis so that my signal is located at the -x-axis.
Example, I have a impulse response of Hn=[4 2 1 0.5] which means h[0]=4, h[1]=2, h[3]=1 and h[4]=0.5. So i would like to reflect the impulse response with respect to the y-axis so that the response will be h[-3]=0.5, h[-2]=1, h[-1]=2 and h[0]=4.

Accepted Answer

Rick Rosson
Rick Rosson on 11 Oct 2014
Edited: Rick Rosson on 11 Oct 2014
n = -3:0;
h = fliplr(Hn);
stem(n,h);
  3 Comments
Jimmy
Jimmy on 11 Oct 2014
my second question is that how to apply time reversal convolution after reflecting the new impulse response?
Rick Rosson
Rick Rosson on 11 Oct 2014
Please post a new question so that more people will see it.

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