Energy Efficiency Optimization for Radar-Communication Coexistence with Statistical CSIT

In this paper, we investigate maximizing the energy efficiency (EE) of a single-cell massive multiple-input multiple-output (MIMO) communication system coexisting with a surveillance radar with statistical channel state in-formation at the transmitter (CSIT). EE is maximized under the constraint of the received signal-to-disturbance ratio (SDR) on the radar side. Since the problem involves coupled variables, alternating optimization is adopted to decompose the original problem into communication and radar optimization. The communication optimization problem can be simplified via the proposed power allocation algorithms. For the radar optimization, there exists a closed-form solution for the radar transmit power. Simulation results verify the performance of the proposed algorithm.