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المشاركة الأصلية كتبت بواسطة llillKERAllill

Thank you for your efforts
would you mind please explain Question 2 part 1 I don't have any idea of what i am suppose to do

what difference between (+) marked and blue color on the (+) marked
(+)marked represents the point of amplitude in the constellation diagram
blue color on the plus sign (the others around them.) represents noise
I think the reason

The reason is due to the presence of noise in the channel. Where signs represent + the exact locations of pairs of amplitude, while other marks represent sites of noisy data

This explanation is in the link
http://www.mathworks.com/help/comm/u...odulation.html