Adaptive Interference Alignment for Femtocell Networks

In this paper, we propose a spectral efficient transmission scheme for femtocell networks, which includes an adaptive subband partition method and an adaptive interference alignment transceiver. By introducing random frequency hopping to achieve the subband partition, we do not need a central coordinator to control the interference among the femtocells, and we can adjust the number of the interference in each subband. By employing adaptive interference alignment transceiver, the interference led by the subband collision can be suppressed. Simulation results show that the transmission scheme improves the system throughput significantly.