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The paper considers a scenario where a base station (BS), equipped with alarge-scale antenna array, execute, using the same frequency range, bothcommunication with mobile users and radar surveillance of the surroundingenvironment, relying on the ability of the massive MIMO array to synthesizemultiple narrow beams. Based on an OFDM signaling format for both communicationand surveillance tasks, a lower bound to the system achievable downlink rate isprovided, along with a GLRT detection rule that does not require any knowledgeabout the target parameters. Then, a power allocation strategy is proposed,aimed at maximizing the fairness across the mobile users, while guaranteeing aminimum signal to interference ratio threshold value for the radar system.Numerical results show that the system performs effectively, and that the powercontrol procedure helps in improving the system fairness.

Transmit Power Allocation for Joint Communication and Sensing through Massive MIMO Arrays