Autocorrelation for walsh code

[santoshfatale]

hi all,
I had generated walsh code in MATLAB using hadamard() function. But when I am trying to find out auto correlation by in-build function its giving triangular type shape whose amplitude are decreasing from center. But I read that auto-correlation for walsh code is impulse function.So plz help me in understanding auto-correlation function for walsh code.

Thanks....

 

[thylacine1975]

Does the autocorrelation *appear* triangular because MATLAB is simply joint the dots between successive points in the plot? (this is the default). Try plotting the autocorrelation again, with 'rx' as the third argument to the plot function to represent each calculated point as a red cross.