Abstract
We introduce an opportunistic interference alignment (OIA) scheme for multiple cellular networks with multiple-input multiple-output interference multiple access channels (MIMO-IMAC). This OIA scheme does not need the global channel state information (CSI). It corresponds to an uplink scenario in a cellular network with multiple base stations consisting of M receive antennas per base station, and multiple users with N transmit antennas per user. In the OIA scheme, each base station (BS) opportunistically selects users who generate least interference to other BSs. In addition each admitted user should achieve a pre-defined target data rate, otherwise this user will not be selected by the corresponding BS. Simulation results show that the proposed scheme provides significant improvement in terms of interference mitigation while maintaining a predefined quality of service (QoS) for each admitted users.
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