| The subcarrier allocation in multiuser MIMO-OFDM system and interference suppression in cellular OFDMA systems become importante in wireless communication. The main work includes the following:This paper presents a new scheme for MIMO-OFDM resource allocation, which allocation of subcarriers and power to each user to maximize the sum of user data rates, subject to constraints on total power, bit error rate, and proportionality among user data rates. A linear non-iterative power allocation method with low complexity is deduced by relaxation of strict user rate proportionality constraints. Simulation results show that this new adaptive allocation scheme can achieve good tradeoff between capacity and fairness as well as provide much better capacity.The interference suppression in cellular methods in multi-cell OFDMA systems was presented. A new interference suppression algorithm based on semi-static interference coordination which can provide QoS of edge-user. This algorithm was simulated and analysed. Through the comparison with current algorithms which based on classic interference coordination strategies, we can get a conclusion that the algorithm in this paper has relatively good performance. |
