Abstract:

In this paper we consider interference-aware uplink transmission schemes for multicell multiple-input multiple-output (MIMO) system. Unlike conventional transmission schemes without considering the interference probably caused to other cell, we jointly optimize the transceiver beamforming vectors to maximize the desired signals while removing the intercell interference. Specifically, for a two-cell system where each transmitter is equipped with two antennas, we derive the closed-form expression for the transmit scheme called coordinated beamforming (CBF) via generalized-eigen analysis. Moreover, when asymmetric interference is considered, we give a balancing beamforming (BBF) scheme where the interfering transmitter is to strike a compromise between maximizing the desired signal and minimizing the generated interference. Simulation results show that both schemes perform better than conventional schemes under different scenarios

Key words:

interference-aware, MIMO system, coordinated beamforming, interference alignment