digital modulation schemes fall into of two classes with opposite behavior characteristic : orthogonal signaling and phase/amplitude signaling. Describe of each class.

please help me solve this question. i had search many book and website but found nothing. thanks for helping.

 

Please read these:

www.plextek.co.uk/papers/schmsv6.pdf -

www.educypedia.be/electronics/rfdigmod.htm

wireless.ictp.it/school_2001/lectures/fitton/digital_mod.pdf

nsayer.blogspot.com/2008/11/overview-of-different-digital.html

www.ece.osu.edu/~roblin/lsna/bayram14958.pdf

Google is your friend

 

is it related to orthogonal signaling and phase/amplitude signaling?i found this article before, but i think it did not answering the question. i need more specific answer. thanks for fast reply.