Resource Allocation for CoMP With Multiuser MIMO-OFDMA

In this paper, we propose new resource allocation schemes with (or without) adaptive modulation for coordinated multipoint (CoMP) with multiuser multiple-input multiple-output orthogonal frequency-division multiple-access (MIMO-OFDMA). In the proposed schemes, a practical linear pre- and postprocessing technique is used to cancel interuser interference and decompose a single-user MIMO channel into parallel noninterfering spatial layers. The transmit power is allocated to spatial layers with (or without) adaptive modulation under the total base station (BS) power constraint and the per-BS power constraint. The set of users for each subcarrier is determined by the exhaustive search user allocation, the sum rate-based user allocation, and the random user allocation. Simulation results show that the proposed schemes enhance the sum rate.