Network MIMO with decision tree classification in downlink OFDMA networks

A coordination strategy among a large cellular MIMO network is presented in this paper. With clustered linear precoding and dynamic frequency reservation techniques, JDFR-BDGMD (Joint Dynamic Frequency Reservation and Block Diagonalization precoding with Geometric Mean Decomposition precoding scheme) greatly mitigates intra-cluster interference as well as inter-cluster interference in the downlink OFDMA networks. Furthermore, the coordination is based on decision tree classification which categorizes users into coordinative users and non-coordinative users. It is noteworthy that we pick a capacity-based subchannel from system available resources for coordinative users. Finally, an equal power allocation algorithm is utilized to distribute power. Simulation results show that our proposed scheme can significantly improve the performance of multi-cell networks.