1.

What is the relation between cross correlation and auto correlation?

A. |r<sub>xy</sub>(l)|=‚àö(r<sub>xx</sub>(0).r<sub>yy</sub>(0))
B. |r<sub>xy</sub>(l)|‚â•‚àö(r<sub>xx(0)</sub>.r<sub>yy</sub>(0))
C. |r<sub>xy</sub>(l)|≠√(r<sub>xx(0)</sub>.r<sub>yy</sub>(0))
D. |r<sub>xy</sub>(l)|≤√(r<sub>xx(0)</sub>.r<sub>yy</sub>(0))
Answer» E.


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