i want to know the differenc between different modulation technique in summary examin and curves between them.

Question

i want summary report about difference between modulations technique pluse that i want curves show difference between them axis of curves are signal to noise ratio and probapility of error
wite big thanks for you

Answer 1

Wikipedia is your friend. You can start from here and follow the links:
http://en.wikipedia.org/wiki/Modulation