Title: Resource Allocation for a Full-Duplex Base Station Aided OFDMA System,
Abstract: Exploiting full-duplex (FD) technology on base stations (BSs) is a promising
solution to enhancing the system performance. Motivated by this, we revisit a
full-duplex base station (FD-BS) aided OFDMA system, which consists of one BS,
several uplink/downlink users and multiple subcarriers. A joint 3-dimensional
(3D) mapping scheme among subcarriers, down-link users (DUEs), uplink users
(UUEs) is considered as well as an associated power allocation optimization. In
detail, we first decompose the complex 3D mapping problem into three
2-dimensional sub ones and solve them by using the iterative Hungarian method,
respectively. Then based on the Lagrange dual method, we sequentially solve the
power allocation and 3- dimensional mapping problem by fixing a dual point.
Finally, the optimal solution can be obtained by utilizing the sub-gradient
method. Unlike existing work that only solves either 3D mapping or power
allocation problem but with a high computation complexity, we tackle both of
them and have successfully reduced computation complexity from exponential to
polynomial order. Numerical simulations are conducted to verify the proposed
scheme.