Beam Synthesis under Feasible Scenarios for Radar and Communications Combined Systems

Spectrum sharing for radar and communications can maximize the utilization of frequency resource. Though several studies have considered the coexistence and joint transmission to accomplish the missions of radar target detection and wireless communications simultaneously, none of the previous studies have considered feasible scenarios. In this paper, we consider a feasible scenario under which all the multiple antennas at the base station are used for joint transmission of radar beams and communications signals. With a careful consideration of the channel models, a beam synthesis algorithm is reviewed for the shared antenna utilization for both radar and communications. Numerical evaluation is provided to investigate the trade-off between the radar and communications performance.