Abstract
To compensate for the transmission efficiency in a cooperative non-orthogonal multiple access (NOMA) system, we enable in-band full-duplex (IBFD) and two-way cognitive transmission at the mobile relay, which assists the NOMA user in weak channel condition while transmitting and receiving its own data by means of spectral sharing. To strike a balance between spectral efficiency and energy conservation, we consider the power allocation problem to maximize the energy efficiency of the hybrid system while maintaining the bit rate requirements of NOMA users. To overcome the non-convexity of the original problem, we apply the successive inner approximation technique and propose an efficient iterative scheme to obtain a Karush–Kuhn–Tucker point in polynomial time. The gain of IBFD-enabled two-way cognitive transmission and the efficiency of the proposed power allocation scheme are validated via simulation results.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
