Department of Electronics and Communication Engineering;
Jaypee University of Information Technology;
Waknaghat-173215;
India;
Department of Electrical and Electronics Engineering Auckland Park Kingsway Campus;
University of Johannesburg;
PO Box 524;
Johannesburg-2006;
S Africa;
Space Application Centre;
Indian Space Research Organization;
Ahmedabad-380015;
India;
cognitive; radio; channel; state; information; non-orthogonal; multiple; access; power; division; multiple; access; superposition-coding; successive-interference-cancellation;