1 research outputs found
Energy- and Spectral-Efficiency Tradeoff in Full-Duplex Communications
This paper investigates the tradeoff between energyefficiency (EE) and
spectral-efficiency (SE) for full-duplex (FD) enabled cellular networks.We
assume that small cell base stations are working in the FD mode while user
devices still work in the conventional half-duplex (HD) mode. First, a
necessary condition for a FD transceiver to achieve better EE-SE tradeoff than
a HD one is derived. Then, we analyze the EE-SE relation of a FD transceiver in
the scenario of single pair of users and obtain a closed-form expression. Next,
we extend the result into the multiuser scenario and prove that EE is a
quasi-concave function of SE in general and develop an optimal algorithm to
achieve the maximum EE based on the Lagrange dual method. Our analysis is
finally verified by extensive numerical results.Comment: 6 pages, 4 figures, conferenc